Load Specifications
Bullet Manufacturer:Barnes
Bullet Weight:150 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:1:11.5
Load data in caliber 7 mm STW with .284 | 150gr | Barnes TTSX BT bullet and 150 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 Winchester StaBALL HD.
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>> | 94% | 59,625 psi | 89% | 2959 fps | 100% |
| Accurate 3100 | <<locked>> | 92% | 57,783 psi | 87% | 2936 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,391 psi | 85% | 2936 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 58,349 psi | 87% | 2963 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 60,017 psi | 90% | 3100 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 92% | 58,726 psi | 88% | 3068 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 90% | 56,884 psi | 85% | 3038 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 90% | 57,740 psi | 87% | 3002 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 59,640 psi | 89% | 3031 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 94% | 59,814 psi | 90% | 3068 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 92% | 57,885 psi | 87% | 3041 fps | 99.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,824 psi | 81% | 2966 fps | 99.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 56,144 psi | 84% | 3009 fps | 99.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,283 psi | 72% | 2923 fps | 100% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 50,430 psi | 76% | 2963 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 57,899 psi | 87% | 2995 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 59,727 psi | 90% | 3028 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 57,943 psi | 87% | 2995 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 86% | 59,712 psi | 90% | 3022 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 58,943 psi | 88% | 3005 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,203 psi | 86% | 2989 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 90% | 59,016 psi | 88% | 3018 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 94% | 59,857 psi | 90% | 3061 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 58,001 psi | 87% | 3035 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,421 psi | 86% | 2969 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 94% | 59,669 psi | 89% | 2999 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,305 psi | 86% | 3035 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 59,770 psi | 90% | 3064 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 58,305 psi | 87% | 3061 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 56,333 psi | 84% | 3031 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 53,359 psi | 80% | 3015 fps | 96.4% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 57,188 psi | 86% | 2966 fps | 97.2% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 58,842 psi | 88% | 2999 fps | 97.7% |
| Bofors RP15 | <<locked>> | 96% | 58,914 psi | 88% | 3045 fps | 99.9% |
| Bofors RP15 | <<locked>> | 94% | 57,159 psi | 86% | 3018 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 56,956 psi | 85% | 3038 fps | 99.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 59,451 psi | 89% | 3074 fps | 99.8% |
| Bofors RP5 | <<locked>> | 94% | 59,857 psi | 90% | 3061 fps | 99.9% |
| Bofors RP5 | <<locked>> | 92% | 58,001 psi | 87% | 3035 fps | 99.9% |
| Bofors RP7 | <<locked>> | 84% | 58,334 psi | 87% | 2940 fps | 100% |
| Bofors RP7 | <<locked>> | 84% | 60,089 psi | 90% | 2969 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 59,828 psi | 90% | 3058 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 98% | 57,783 psi | 87% | 3031 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 84% | 58,334 psi | 87% | 2995 fps | 100% |
| Hodgdon H414 | <<locked>> | 84% | 60,147 psi | 90% | 3025 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 57,000 psi | 85% | 2953 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 82% | 58,523 psi | 88% | 2982 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 92% | 59,364 psi | 89% | 3005 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 90% | 57,188 psi | 86% | 2976 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 92% | 58,146 psi | 87% | 2986 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 92% | 60,118 psi | 90% | 3018 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,827 psi | 87% | 2913 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 59,959 psi | 90% | 2943 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 60,147 psi | 90% | 3173 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 58,697 psi | 88% | 3153 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 59,466 psi | 89% | 3035 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 57,188 psi | 86% | 3002 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,144 psi | 56% | 1886 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,188 psi | 56% | 1896 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,898 psi | 85% | 2927 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 58,508 psi | 88% | 2956 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 84% | 59,785 psi | 90% | 2963 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 57,783 psi | 87% | 2936 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 56,942 psi | 85% | 2930 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 58,755 psi | 88% | 2956 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 59,828 psi | 90% | 2982 fps | 99.2% |
| IMR 4955 Enduron | <<locked>> | 90% | 57,740 psi | 87% | 2956 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 94% | 57,696 psi | 86% | 3045 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 94% | 60,133 psi | 90% | 3084 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,584 psi | 65% | 2822 fps | 97.2% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 45,847 psi | 69% | 2864 fps | 97.9% |
| Lovex S065 | <<locked>> | 84% | 56,971 psi | 85% | 2907 fps | 100% |
| Lovex S065 | <<locked>> | 84% | 58,465 psi | 88% | 2930 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 58,914 psi | 88% | 2956 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 56,927 psi | 85% | 2930 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 56,869 psi | 85% | 2923 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 59,001 psi | 88% | 2953 fps | 100% |
| Norma 204 | <<locked>> | 86% | 58,175 psi | 87% | 2986 fps | 99.7% |
| Norma 204 | <<locked>> | 86% | 60,046 psi | 90% | 3015 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 44,106 psi | 66% | 2851 fps | 99.1% |
| Norma 217ᴾ | <<locked>> | 100% | 46,325 psi | 69% | 2890 fps | 99.5% |
| Norma MRP | <<locked>> | 92% | 60,089 psi | 90% | 3081 fps | 100% |
| Norma MRP | <<locked>> | 90% | 58,262 psi | 87% | 3054 fps | 100% |
| Norma URP | <<locked>> | 86% | 58,726 psi | 88% | 2972 fps | 100% |
| Norma URP | <<locked>> | 84% | 56,739 psi | 85% | 2949 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 58,987 psi | 88% | 3068 fps | 99.7% |
| Ramshot Grand | <<locked>> | 92% | 57,014 psi | 85% | 3041 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 86% | 57,812 psi | 87% | 2982 fps | 100% |
| Ramshot Hunter | <<locked>> | 86% | 59,712 psi | 90% | 3012 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 57,290 psi | 86% | 2995 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 59,828 psi | 90% | 3031 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,942 psi | 57% | 1929 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,159 psi | 57% | 1942 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,753 psi | 85% | 2956 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 58,784 psi | 88% | 2989 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 59,683 psi | 89% | 3045 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 57,493 psi | 86% | 3018 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 57,159 psi | 86% | 3107 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 59,944 psi | 90% | 3143 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 56,391 psi | 85% | 3058 fps | 98.7% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 59,234 psi | 89% | 3100 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 82% | 59,828 psi | 90% | 2933 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 58,639 psi | 88% | 2969 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 88% | 56,652 psi | 85% | 2946 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 90% | 56,840 psi | 85% | 2979 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 90% | 58,769 psi | 88% | 3012 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 84% | 58,334 psi | 87% | 2940 fps | 100% |
| Rottweil R 907 | <<locked>> | 84% | 60,089 psi | 90% | 2969 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,971 psi | 85% | 2907 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 58,465 psi | 88% | 2930 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 58,914 psi | 88% | 2956 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 56,927 psi | 85% | 2930 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 59,176 psi | 89% | 2799 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 59,988 psi | 90% | 2913 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 57,740 psi | 87% | 2887 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,420 psi | 85% | 2972 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 58,349 psi | 87% | 3005 fps | 99.9% |
| Somchem S355 | <<locked>> | 82% | 59,277 psi | 89% | 2923 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 56,550 psi | 85% | 2904 fps | 98.7% |
| Somchem S361 | <<locked>> | 88% | 58,262 psi | 87% | 2933 fps | 99% |
| Somchem S365 | <<locked>> | 88% | 59,654 psi | 89% | 2972 fps | 100% |
| Somchem S365 | <<locked>> | 86% | 57,885 psi | 87% | 2949 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,174 psi | 86% | 2946 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 59,205 psi | 89% | 2979 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 56,927 psi | 85% | 2844 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 58,755 psi | 88% | 2871 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,550 psi | 85% | 2910 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 58,378 psi | 88% | 2940 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,000 psi | 85% | 2927 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 94% | 58,958 psi | 88% | 2959 fps | 100% |
| Vihtavuori N170ᴾ | <<locked>> | 100% | 59,901 psi | 90% | 2992 fps | 95.9% |
| Vihtavuori N550 | <<locked>> | 86% | 59,582 psi | 89% | 2966 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 57,537 psi | 86% | 2943 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 59,364 psi | 89% | 2995 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 57,595 psi | 86% | 2972 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 59,683 psi | 89% | 3081 fps | 99.3% |
| Vihtavuori N560 | <<locked>> | 90% | 57,841 psi | 87% | 3054 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 98% | 59,814 psi | 90% | 3058 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 96% | 58,044 psi | 87% | 3031 fps | 99.3% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 57,130 psi | 86% | 3061 fps | 98.4% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 59,770 psi | 90% | 3104 fps | 98.9% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 56,478 psi | 85% | 3091 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 60,350 psi | 90% | 2913 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 58,276 psi | 87% | 2890 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 58,581 psi | 88% | 2999 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 56,376 psi | 85% | 2969 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,202 psi | 84% | 3048 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 59,045 psi | 89% | 3084 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,377 psi | 86% | 2946 fps | 99.7% |
| Winchester Supreme 780 | <<locked>> | 92% | 59,335 psi | 89% | 2976 fps | 99.9% |
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% | 36,680 psi | 55% | 2562 fps | 98.2% |
| Accurate 3100 | <<locked>> | 80% | 37,927 psi | 57% | 2592 fps | 98.6% |
| Accurate 4350 | <<locked>> | 80% | 49,182 psi | 74% | 2825 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 50,734 psi | 76% | 2851 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 41,785 psi | 63% | 2769 fps | 96.3% |
| Accurate MAGPRO | <<locked>> | 84% | 44,019 psi | 66% | 2802 fps | 95.5% |
| Accurate MAGPRO | <<locked>> | 82% | 42,424 psi | 64% | 2772 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 40,944 psi | 61% | 2700 fps | 97% |
| ADI AR 2209 | <<locked>> | 80% | 42,424 psi | 64% | 2733 fps | 97.6% |
| ADI AR 2213 | <<locked>> | 82% | 39,233 psi | 59% | 2687 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 82% | 40,567 psi | 61% | 2720 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 90% | 37,942 psi | 57% | 2651 fps | 95% |
| ADI AR 2217 | <<locked>> | 90% | 39,378 psi | 59% | 2690 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 88% | 31,995 psi | 48% | 2546 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 86% | 31,125 psi | 47% | 2520 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,423 psi | 62% | 2703 fps | 97.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 42,714 psi | 64% | 2733 fps | 97.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,224 psi | 71% | 2831 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 48,762 psi | 73% | 2861 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 54,998 psi | 82% | 2949 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,046 psi | 62% | 2697 fps | 97.1% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,279 psi | 63% | 2723 fps | 97.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,869 psi | 55% | 2635 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,290 psi | 57% | 2667 fps | 96.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,462 psi | 53% | 2592 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,854 psi | 55% | 2621 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,574 psi | 46% | 2500 fps | 96.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,792 psi | 48% | 2533 fps | 97.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,407 psi | 59% | 2736 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 41,379 psi | 62% | 2772 fps | 99.9% |
| Alliant Reloder-33 | <<locked>> | 98% | 49,269 psi | 74% | 2943 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 50,256 psi | 75% | 2848 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 48,515 psi | 73% | 2818 fps | 95.2% |
| Bofors RP15 | <<locked>> | 82% | 36,564 psi | 55% | 2625 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 35,418 psi | 53% | 2595 fps | 95.2% |
| Bofors RP30 | <<locked>> | 88% | 37,202 psi | 56% | 2661 fps | 95% |
| Bofors RP30 | <<locked>> | 88% | 38,914 psi | 58% | 2700 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 36,869 psi | 55% | 2635 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 38,290 psi | 57% | 2667 fps | 96.5% |
| Bofors RP7 | <<locked>> | 80% | 51,358 psi | 77% | 2831 fps | 99.6% |
| Bofors RP7 | <<locked>> | 80% | 52,678 psi | 79% | 2858 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 88% | 38,812 psi | 58% | 2677 fps | 96.1% |
| Hodgdon H1000 | <<locked>> | 86% | 37,623 psi | 56% | 2651 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 50,850 psi | 76% | 2877 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 52,634 psi | 79% | 2910 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 80% | 53,388 psi | 80% | 2897 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 54,940 psi | 82% | 2923 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 82% | 41,901 psi | 63% | 2697 fps | 95.4% |
| Hodgdon H4831 | <<locked>> | 80% | 40,408 psi | 61% | 2667 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 82% | 41,176 psi | 62% | 2680 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 82% | 42,511 psi | 64% | 2713 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,396 psi | 67% | 2710 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,847 psi | 69% | 2736 fps | 100% |
| Hodgdon Retumbo | 69.3 gr | 84% | 34,287 psi | 51% | 2644 fps | 95.3% |
| Hodgdon Retumbo | 69.3 gr | 84% | 35,679 psi | 53% | 2687 fps | 96.2% |
| Hodgdon Superformance | <<locked>> | 80% | 51,227 psi | 77% | 2907 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 80% | 53,069 psi | 80% | 2940 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,891 psi | 42% | 1693 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,862 psi | 42% | 1699 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,760 psi | 70% | 2759 fps | 99.1% |
| IMR 4350 | <<locked>> | 80% | 48,196 psi | 72% | 2789 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,779 psi | 79% | 2854 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 54,288 psi | 81% | 2884 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 46,528 psi | 70% | 2766 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 48,109 psi | 72% | 2795 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,567 psi | 61% | 2638 fps | 95.1% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,858 psi | 63% | 2667 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 84% | 40,437 psi | 61% | 2726 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 82% | 39,189 psi | 59% | 2700 fps | 95.3% |
| IMR 8133 Enduron | <<locked>> | 96% | 37,884 psi | 57% | 2697 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 96% | 39,813 psi | 60% | 2736 fps | 96.1% |
| Lovex S065 | <<locked>> | 80% | 50,212 psi | 75% | 2802 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 51,547 psi | 77% | 2825 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,602 psi | 73% | 2795 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 49,937 psi | 75% | 2818 fps | 99.8% |
| Lovex S071 | <<locked>> | 80% | 31,328 psi | 47% | 2434 fps | 96.4% |
| Lovex S071 | <<locked>> | 80% | 32,576 psi | 49% | 2464 fps | 97% |
| Norma 204 | <<locked>> | 80% | 47,094 psi | 71% | 2802 fps | 98.4% |
| Norma 204 | <<locked>> | 80% | 48,733 psi | 73% | 2835 fps | 98.8% |
| Norma 217 | <<locked>> | 92% | 33,054 psi | 50% | 2595 fps | 95.5% |
| Norma 217 | <<locked>> | 90% | 32,213 psi | 48% | 2569 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 38,696 psi | 58% | 2700 fps | 97.8% |
| Norma MRP | <<locked>> | 80% | 40,379 psi | 61% | 2736 fps | 98.3% |
| Norma URP | <<locked>> | 80% | 48,138 psi | 72% | 2812 fps | 100% |
| Norma URP | <<locked>> | 80% | 49,574 psi | 74% | 2838 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 40,364 psi | 61% | 2736 fps | 96.1% |
| Ramshot Grand | <<locked>> | 82% | 38,899 psi | 58% | 2703 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 46,978 psi | 70% | 2808 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 80% | 48,660 psi | 73% | 2841 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 82% | 33,388 psi | 50% | 2543 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 80% | 32,227 psi | 48% | 2513 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,485 psi | 43% | 1732 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,471 psi | 43% | 1739 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,356 psi | 74% | 2844 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 51,140 psi | 77% | 2877 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,732 psi | 72% | 2864 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 49,559 psi | 74% | 2897 fps | 100% |
| ReloadSwiss RS 76 | 74.2 gr | 84% | 33,489 psi | 50% | 2618 fps | 96.3% |
| ReloadSwiss RS 76 | 72.4 gr | 82% | 32,430 psi | 49% | 2585 fps | 95.9% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 44,338 psi | 66% | 2844 fps | 96% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 43,178 psi | 65% | 2818 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 56,202 psi | 84% | 2881 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 42,250 psi | 63% | 2680 fps | 96.3% |
| Rottweil R 904 | <<locked>> | 80% | 43,453 psi | 65% | 2710 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 80% | 40,350 psi | 60% | 2680 fps | 97% |
| Rottweil R 905 | <<locked>> | 80% | 41,655 psi | 62% | 2710 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 80% | 51,358 psi | 77% | 2831 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 80% | 52,678 psi | 79% | 2858 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,212 psi | 75% | 2802 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,547 psi | 77% | 2825 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,602 psi | 73% | 2795 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 49,937 psi | 75% | 2818 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 55,622 psi | 83% | 2753 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,139 psi | 74% | 2749 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,531 psi | 76% | 2776 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,016 psi | 60% | 2677 fps | 96.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,321 psi | 62% | 2703 fps | 97.4% |
| Somchem S355 | <<locked>> | 80% | 55,753 psi | 84% | 2877 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 42,989 psi | 64% | 2667 fps | 95.8% |
| Somchem S361 | <<locked>> | 80% | 44,324 psi | 66% | 2697 fps | 96.3% |
| Somchem S365 | <<locked>> | 80% | 45,295 psi | 68% | 2762 fps | 100% |
| Somchem S365 | <<locked>> | 80% | 47,036 psi | 71% | 2792 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,872 psi | 61% | 2664 fps | 98% |
| Somchem S385 | <<locked>> | 80% | 42,264 psi | 63% | 2694 fps | 98.4% |
| Vihtavuori N150 | <<locked>> | 80% | 53,476 psi | 80% | 2799 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 54,868 psi | 82% | 2822 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,632 psi | 74% | 2808 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 51,024 psi | 76% | 2831 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,447 psi | 53% | 2533 fps | 95.9% |
| Vihtavuori N165 | <<locked>> | 80% | 36,579 psi | 55% | 2559 fps | 96.5% |
| Vihtavuori N170 | <<locked>> | 98% | 55,956 psi | 84% | 2930 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 48,776 psi | 73% | 2805 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 50,473 psi | 76% | 2835 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,566 psi | 59% | 2671 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 41,176 psi | 62% | 2700 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 41,756 psi | 63% | 2759 fps | 95.5% |
| Vihtavuori N560 | <<locked>> | 80% | 40,335 psi | 60% | 2726 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 88% | 42,061 psi | 63% | 2746 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 86% | 40,915 psi | 61% | 2720 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 94% | 45,759 psi | 69% | 2861 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 92% | 44,425 psi | 67% | 2835 fps | 95.5% |
| Vihtavuori N570 | <<locked>> | 98% | 52,446 psi | 79% | 3022 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,936 psi | 73% | 2759 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 50,459 psi | 76% | 2782 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,053 psi | 77% | 2881 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 52,634 psi | 79% | 2910 fps | 99.9% |
| Winchester StaBALL HD | 67.8 gr | 80% | 31,981 psi | 48% | 2615 fps | 100% |
| Winchester StaBALL HD | 67.8 gr | 80% | 33,866 psi | 51% | 2651 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,362 psi | 56% | 2582 fps | 96% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,682 psi | 58% | 2615 fps | 96.6% |
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 150 powders for 7 mm STW loaded with the .284 | 150gr | Barnes TTSX BT. Hodgdon Retumbo delivers the highest muzzle velocity at 3,173 fps; across all powders the maximum-charge window runs from 1,886 fps to 3,173 fps. ADI AR 2217 gives the best case fill at 100 %, and 150 of the 150 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 150.0 gr projectile in 0.284" calls for a 1:11.5 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, Winchester StaBALL HD rank at the top here: for 7 mm STW with the .284 | 150gr | Barnes TTSX 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.