Load Specifications
Bullet:.284 | 152gr | Barnes LRX BT
Bullet Manufacturer:Barnes
Bullet Weight:152 gr
Bullet Diameter:0.284"
Bullet Length:<<locked>>
Caliber:7 mm STW load data
Case Length (l3):2.85"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:97 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:66,717 psi
Recommended Twist Rate:1:9.0
Load data in caliber 7 mm STW with .284 | 152gr | Barnes LRX BT bullet and 153 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and IMR 7828 SSC.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 92% | 56,869 psi | 85% | 2907 fps | 100% |
| Accurate 3100 | <<locked>> | 94% | 59,915 psi | 90% | 2946 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 57,696 psi | 86% | 2940 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,797 psi | 85% | 2923 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 59,146 psi | 89% | 3071 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 92% | 60,220 psi | 90% | 3074 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 92% | 59,059 psi | 89% | 3054 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 90% | 58,943 psi | 88% | 3005 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 90% | 57,943 psi | 87% | 2986 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 92% | 57,000 psi | 85% | 3012 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 94% | 60,118 psi | 90% | 3054 fps | 99.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 55,230 psi | 83% | 2976 fps | 99.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 54,143 psi | 81% | 2959 fps | 99.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,603 psi | 74% | 2933 fps | 100% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,602 psi | 73% | 2917 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 59,088 psi | 89% | 2999 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 59,016 psi | 88% | 2995 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 86% | 58,102 psi | 87% | 2982 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 60,307 psi | 90% | 3002 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 59,379 psi | 89% | 2992 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 58,363 psi | 87% | 2989 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,406 psi | 86% | 2976 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 92% | 57,130 psi | 86% | 3005 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 94% | 60,104 psi | 90% | 3048 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 94% | 58,726 psi | 88% | 2969 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,682 psi | 86% | 2956 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 58,668 psi | 88% | 3035 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,392 psi | 86% | 3018 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 59,741 psi | 90% | 3061 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 58,653 psi | 88% | 3045 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 52,373 psi | 79% | 2986 fps | 96.2% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 58,073 psi | 87% | 2969 fps | 97.5% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 57,232 psi | 86% | 2953 fps | 97.3% |
| Bofors RP15 | <<locked>> | 96% | 60,176 psi | 90% | 3048 fps | 99.9% |
| Bofors RP15 | <<locked>> | 96% | 58,943 psi | 88% | 3028 fps | 99.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 58,218 psi | 87% | 3041 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 57,043 psi | 86% | 3025 fps | 99.6% |
| Bofors RP5 | <<locked>> | 92% | 57,130 psi | 86% | 3005 fps | 99.9% |
| Bofors RP5 | <<locked>> | 94% | 60,104 psi | 90% | 3048 fps | 100% |
| Bofors RP7 | <<locked>> | 84% | 59,248 psi | 89% | 2940 fps | 100% |
| Bofors RP7 | <<locked>> | 84% | 58,450 psi | 88% | 2923 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 56,826 psi | 85% | 3002 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 59,930 psi | 90% | 3045 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 84% | 59,321 psi | 89% | 2992 fps | 100% |
| Hodgdon H414 | <<locked>> | 84% | 58,494 psi | 88% | 2982 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 57,943 psi | 87% | 2953 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 82% | 57,130 psi | 86% | 2936 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 90% | 56,608 psi | 85% | 2946 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 92% | 59,640 psi | 89% | 2992 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 92% | 59,292 psi | 89% | 2989 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 92% | 58,392 psi | 88% | 2972 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 59,117 psi | 89% | 2913 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 58,233 psi | 87% | 2900 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 57,609 psi | 86% | 3117 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 56,405 psi | 85% | 3100 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 56,304 psi | 84% | 2969 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 59,727 psi | 90% | 3022 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,289 psi | 56% | 1880 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,246 psi | 56% | 1877 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,769 psi | 87% | 2927 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,029 psi | 85% | 2913 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 57,174 psi | 86% | 2907 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 84% | 60,133 psi | 90% | 2949 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 57,957 psi | 87% | 2927 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 57,116 psi | 86% | 2913 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 57,145 psi | 86% | 2927 fps | 99% |
| IMR 4955 Enduron | <<locked>> | 92% | 60,031 psi | 90% | 2969 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 94% | 58,972 psi | 88% | 3051 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 94% | 57,986 psi | 87% | 3031 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 44,918 psi | 67% | 2831 fps | 97.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,845 psi | 66% | 2812 fps | 97.3% |
| Lovex S065 | <<locked>> | 84% | 57,856 psi | 87% | 2904 fps | 100% |
| Lovex S065 | <<locked>> | 84% | 57,087 psi | 86% | 2890 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 59,828 psi | 90% | 2953 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 59,045 psi | 89% | 2943 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 58,334 psi | 87% | 2927 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 57,130 psi | 86% | 2910 fps | 100% |
| Norma 204 | <<locked>> | 86% | 59,117 psi | 89% | 2986 fps | 99.8% |
| Norma 204 | <<locked>> | 86% | 58,407 psi | 88% | 2972 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 45,339 psi | 68% | 2858 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 44,164 psi | 66% | 2838 fps | 99.2% |
| Norma MRP | <<locked>> | 90% | 57,377 psi | 86% | 3025 fps | 100% |
| Norma MRP | <<locked>> | 90% | 56,101 psi | 84% | 3005 fps | 100% |
| Norma URP | <<locked>> | 86% | 59,727 psi | 90% | 2972 fps | 100% |
| Norma URP | <<locked>> | 86% | 58,856 psi | 88% | 2959 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 56,072 psi | 84% | 3012 fps | 99.5% |
| Ramshot Grand | <<locked>> | 94% | 59,321 psi | 89% | 3058 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 86% | 58,784 psi | 88% | 2979 fps | 100% |
| Ramshot Hunter | <<locked>> | 86% | 58,001 psi | 87% | 2969 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 58,900 psi | 88% | 3002 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 57,696 psi | 86% | 2982 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,101 psi | 57% | 1923 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,058 psi | 57% | 1919 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 58,015 psi | 87% | 2959 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,174 psi | 86% | 2946 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 56,753 psi | 85% | 2989 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 59,944 psi | 90% | 3035 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 58,769 psi | 88% | 3110 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 57,580 psi | 86% | 3094 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 58,233 psi | 87% | 3071 fps | 99.1% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 56,579 psi | 85% | 3045 fps | 98.8% |
| Rottweil R 903 | <<locked>> | 82% | 60,176 psi | 90% | 2917 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 59,756 psi | 90% | 2972 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 90% | 58,813 psi | 88% | 2956 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 90% | 58,088 psi | 87% | 2982 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 90% | 57,043 psi | 86% | 2966 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 84% | 59,248 psi | 89% | 2940 fps | 100% |
| Rottweil R 907 | <<locked>> | 84% | 58,450 psi | 88% | 2923 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,856 psi | 87% | 2904 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,087 psi | 86% | 2890 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 59,828 psi | 90% | 2953 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 59,045 psi | 89% | 2943 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 60,075 psi | 90% | 2792 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 59,466 psi | 89% | 2782 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,985 psi | 85% | 2858 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 60,104 psi | 90% | 2897 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 57,653 psi | 86% | 2979 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,623 psi | 85% | 2963 fps | 99.8% |
| Somchem S355 | <<locked>> | 82% | 60,234 psi | 90% | 2920 fps | 100% |
| Somchem S355 | <<locked>> | 82% | 59,611 psi | 89% | 2910 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 57,566 psi | 86% | 2907 fps | 99% |
| Somchem S361 | <<locked>> | 88% | 56,739 psi | 85% | 2890 fps | 98.8% |
| Somchem S365 | <<locked>> | 86% | 57,014 psi | 85% | 2920 fps | 100% |
| Somchem S365 | <<locked>> | 88% | 60,133 psi | 90% | 2959 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 58,349 psi | 87% | 2949 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,392 psi | 86% | 2936 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 58,102 psi | 87% | 2844 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 57,246 psi | 86% | 2831 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 57,783 psi | 87% | 2910 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,913 psi | 85% | 2897 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 58,175 psi | 87% | 2933 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,261 psi | 86% | 2917 fps | 99.9% |
| Vihtavuori N170ᴾ | <<locked>> | 100% | 60,249 psi | 90% | 2982 fps | 96.1% |
| Vihtavuori N550 | <<locked>> | 84% | 57,000 psi | 85% | 2917 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 59,799 psi | 90% | 2953 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 56,811 psi | 85% | 2943 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 59,611 psi | 89% | 2982 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 57,000 psi | 85% | 3025 fps | 99.1% |
| Vihtavuori N560 | <<locked>> | 92% | 60,002 psi | 90% | 3068 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 96% | 57,087 psi | 86% | 3002 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 98% | 60,162 psi | 90% | 3048 fps | 99.5% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 58,668 psi | 88% | 3071 fps | 98.7% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 57,319 psi | 86% | 3048 fps | 98.5% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 55,347 psi | 83% | 3058 fps | 96.5% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 54,215 psi | 81% | 3038 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 57,421 psi | 86% | 2861 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,492 psi | 85% | 2851 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 59,582 psi | 89% | 2995 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 58,740 psi | 88% | 2986 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 58,102 psi | 87% | 3054 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,565 psi | 85% | 3038 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 58,523 psi | 88% | 2949 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,653 psi | 86% | 2933 fps | 99.8% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 37,507 psi | 56% | 2569 fps | 98.5% |
| Accurate 3100 | <<locked>> | 80% | 36,738 psi | 55% | 2552 fps | 98.3% |
| Accurate 4350 | <<locked>> | 80% | 50,227 psi | 75% | 2825 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 49,298 psi | 74% | 2812 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 41,205 psi | 62% | 2743 fps | 96.2% |
| Accurate MAGPRO | <<locked>> | 82% | 41,742 psi | 63% | 2743 fps | 95% |
| Accurate MAGPRO | <<locked>> | 84% | 44,208 psi | 66% | 2792 fps | 95.7% |
| ADI AR 2209 | <<locked>> | 80% | 41,785 psi | 63% | 2703 fps | 97.5% |
| ADI AR 2209 | <<locked>> | 80% | 41,191 psi | 62% | 2690 fps | 97.2% |
| ADI AR 2213 | <<locked>> | 82% | 40,045 psi | 60% | 2694 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 82% | 39,349 psi | 59% | 2677 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 90% | 38,841 psi | 58% | 2664 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 90% | 38,087 psi | 57% | 2644 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 86% | 30,647 psi | 46% | 2493 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 88% | 32,111 psi | 48% | 2539 fps | 96% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 42,293 psi | 63% | 2707 fps | 97.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 48,211 psi | 72% | 2831 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,500 psi | 71% | 2822 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 56,086 psi | 84% | 2946 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 55,172 psi | 83% | 2933 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,872 psi | 63% | 2700 fps | 97.5% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,133 psi | 62% | 2684 fps | 97.2% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,695 psi | 56% | 2638 fps | 96.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,970 psi | 55% | 2621 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,361 psi | 55% | 2598 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,563 psi | 53% | 2582 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,270 psi | 47% | 2507 fps | 97.4% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,777 psi | 46% | 2490 fps | 97% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,596 psi | 61% | 2746 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,784 psi | 60% | 2730 fps | 99.8% |
| Alliant Reloder-33 | <<locked>> | 98% | 48,341 psi | 72% | 2913 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 47,921 psi | 72% | 2789 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 50,459 psi | 76% | 2835 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 34,998 psi | 52% | 2572 fps | 95.1% |
| Bofors RP15 | <<locked>> | 82% | 36,825 psi | 55% | 2615 fps | 95.7% |
| Bofors RP30 | <<locked>> | 88% | 38,261 psi | 57% | 2674 fps | 95.7% |
| Bofors RP30 | <<locked>> | 88% | 37,362 psi | 56% | 2651 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 37,695 psi | 56% | 2638 fps | 96.3% |
| Bofors RP5 | <<locked>> | 80% | 36,970 psi | 55% | 2621 fps | 96% |
| Bofors RP7 | <<locked>> | 80% | 52,214 psi | 78% | 2831 fps | 99.7% |
| Bofors RP7 | <<locked>> | 80% | 51,416 psi | 77% | 2815 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 86% | 37,057 psi | 56% | 2621 fps | 95.6% |
| Hodgdon H1000 | <<locked>> | 86% | 36,318 psi | 54% | 2602 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 51,793 psi | 78% | 2877 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 51,169 psi | 77% | 2867 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 80% | 54,302 psi | 81% | 2897 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 80% | 53,505 psi | 80% | 2881 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 82% | 42,699 psi | 64% | 2700 fps | 95.9% |
| Hodgdon H4831 | <<locked>> | 82% | 42,003 psi | 63% | 2684 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 82% | 41,989 psi | 63% | 2684 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 82% | 41,292 psi | 62% | 2667 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,339 psi | 68% | 2710 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,454 psi | 67% | 2697 fps | 100% |
| Hodgdon Retumbo | 66.8 gr | 84% | 35,201 psi | 53% | 2661 fps | 96.1% |
| Hodgdon Retumbo | 66.8 gr | 84% | 34,403 psi | 52% | 2638 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 52,373 psi | 79% | 2910 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 80% | 51,401 psi | 77% | 2894 fps | 99.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,934 psi | 42% | 1686 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,775 psi | 42% | 1677 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,587 psi | 71% | 2762 fps | 99.3% |
| IMR 4350 | <<locked>> | 80% | 47,021 psi | 70% | 2749 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,621 psi | 80% | 2854 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,055 psi | 80% | 2844 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 47,630 psi | 71% | 2769 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 46,804 psi | 70% | 2753 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,307 psi | 62% | 2641 fps | 95.6% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,799 psi | 61% | 2631 fps | 95.4% |
| IMR 7828 SSC | 65.2 gr | 82% | 38,653 psi | 58% | 2674 fps | 95.2% |
| IMR 7828 SSC | 66.8 gr | 84% | 40,741 psi | 61% | 2720 fps | 95.9% |
| IMR 8133 Enduron | <<locked>> | 96% | 39,059 psi | 59% | 2710 fps | 95.9% |
| IMR 8133 Enduron | <<locked>> | 96% | 38,072 psi | 57% | 2687 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 51,082 psi | 77% | 2802 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 50,285 psi | 75% | 2785 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,472 psi | 74% | 2795 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 48,704 psi | 73% | 2779 fps | 99.7% |
| Lovex S071 | <<locked>> | 80% | 32,097 psi | 48% | 2441 fps | 96.8% |
| Lovex S071 | <<locked>> | 80% | 31,517 psi | 47% | 2425 fps | 96.5% |
| Norma 204 | <<locked>> | 80% | 48,167 psi | 72% | 2808 fps | 98.7% |
| Norma 204 | <<locked>> | 80% | 47,398 psi | 71% | 2792 fps | 98.5% |
| Norma 217 | <<locked>> | 90% | 31,662 psi | 47% | 2543 fps | 95% |
| Norma 217 | <<locked>> | 92% | 33,214 psi | 50% | 2585 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 39,798 psi | 60% | 2710 fps | 98.2% |
| Norma MRP | <<locked>> | 80% | 39,015 psi | 58% | 2694 fps | 98% |
| Norma URP | <<locked>> | 80% | 49,081 psi | 74% | 2812 fps | 100% |
| Norma URP | <<locked>> | 80% | 48,225 psi | 72% | 2795 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 38,363 psi | 57% | 2677 fps | 95.6% |
| Ramshot Grand | <<locked>> | 82% | 37,521 psi | 56% | 2657 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 48,066 psi | 72% | 2812 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 80% | 47,297 psi | 71% | 2799 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 82% | 34,142 psi | 51% | 2549 fps | 96% |
| Ramshot Magnum | <<locked>> | 82% | 33,504 psi | 50% | 2533 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,543 psi | 43% | 1726 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,384 psi | 43% | 1716 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,314 psi | 75% | 2844 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,472 psi | 74% | 2831 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,950 psi | 73% | 2871 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,906 psi | 72% | 2851 fps | 100% |
| ReloadSwiss RS 76 | 69.8 gr | 82% | 31,923 psi | 48% | 2559 fps | 95.7% |
| ReloadSwiss RS 76 | 69.8 gr | 82% | 31,212 psi | 47% | 2539 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 42,308 psi | 63% | 2785 fps | 95.5% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 41,307 psi | 62% | 2766 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 56,260 psi | 84% | 2864 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 43,047 psi | 65% | 2687 fps | 96.7% |
| Rottweil R 904 | <<locked>> | 80% | 42,308 psi | 63% | 2671 fps | 96.4% |
| Rottweil R 905 | <<locked>> | 80% | 41,205 psi | 62% | 2684 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 80% | 40,422 psi | 61% | 2667 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 80% | 52,214 psi | 78% | 2831 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 80% | 51,416 psi | 77% | 2815 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,082 psi | 77% | 2802 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,285 psi | 75% | 2785 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,472 psi | 74% | 2795 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 48,704 psi | 73% | 2779 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 56,492 psi | 85% | 2749 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 55,854 psi | 84% | 2740 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,980 psi | 75% | 2749 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,211 psi | 74% | 2733 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,872 psi | 61% | 2680 fps | 97.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,118 psi | 60% | 2664 fps | 97.1% |
| Somchem S355 | <<locked>> | 80% | 56,710 psi | 85% | 2874 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 55,796 psi | 84% | 2861 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 43,874 psi | 66% | 2671 fps | 96.3% |
| Somchem S361 | <<locked>> | 80% | 43,091 psi | 65% | 2654 fps | 95.9% |
| Somchem S365 | <<locked>> | 80% | 46,311 psi | 69% | 2762 fps | 100% |
| Somchem S365 | <<locked>> | 80% | 45,600 psi | 68% | 2749 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,698 psi | 63% | 2667 fps | 98.3% |
| Somchem S385 | <<locked>> | 80% | 40,973 psi | 61% | 2648 fps | 98.1% |
| Vihtavuori N150 | <<locked>> | 80% | 54,389 psi | 82% | 2795 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 53,548 psi | 80% | 2782 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 50,560 psi | 76% | 2805 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,719 psi | 75% | 2792 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,201 psi | 54% | 2539 fps | 96.4% |
| Vihtavuori N165 | <<locked>> | 80% | 35,520 psi | 53% | 2520 fps | 96.1% |
| Vihtavuori N170 | <<locked>> | 98% | 56,057 psi | 84% | 2920 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 49,864 psi | 75% | 2808 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 49,066 psi | 74% | 2795 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,495 psi | 61% | 2671 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,827 psi | 60% | 2657 fps | 99.9% |
| Vihtavuori N560 | <<locked>> | 80% | 39,784 psi | 60% | 2700 fps | 95% |
| Vihtavuori N560 | <<locked>> | 82% | 41,901 psi | 63% | 2746 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 86% | 40,248 psi | 60% | 2694 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 86% | 39,392 psi | 59% | 2674 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 92% | 43,540 psi | 65% | 2802 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 94% | 45,847 psi | 69% | 2851 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 98% | 51,547 psi | 77% | 2992 fps | 95.5% |
| Vihtavuori N570 | <<locked>> | 98% | 50,198 psi | 75% | 2966 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 50,009 psi | 75% | 2759 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,066 psi | 74% | 2746 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 52,011 psi | 78% | 2881 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 51,169 psi | 77% | 2867 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 33,214 psi | 50% | 2625 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,300 psi | 48% | 2608 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,145 psi | 57% | 2589 fps | 96.4% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,623 psi | 56% | 2575 fps | 96.2% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 153 powders for 7 mm STW loaded with the .284 | 152gr | Barnes LRX BT. Hodgdon Retumbo delivers the highest muzzle velocity at 3,117 fps; across all powders the maximum-charge window runs from 1,877 fps to 3,117 fps. ADI AR 2217 gives the best case fill at 100 %, and 153 of the 153 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (460 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 152.0 gr projectile in 0.284" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2217, ADI AR 2225 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Hodgdon Retumbo, ReloadSwiss RS 76, IMR 7828 SSC rank at the top here: for 7 mm STW with the .284 | 152gr | Barnes LRX BT they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.