Load Specifications
Load data in caliber 7 mm STW with .284 | 150gr | Barnes X BT bullet and 68 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 ReloadSwiss RS 80.
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.
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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 90% | 59,292 psi | 89% | 2940 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 59,582 psi | 89% | 2963 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 57,276 psi | 86% | 3031 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 88% | 59,263 psi | 89% | 3012 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 90% | 57,493 psi | 86% | 3025 fps | 99.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 59,988 psi | 90% | 3051 fps | 99.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,708 psi | 82% | 3022 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 59,480 psi | 89% | 3005 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 58,943 psi | 88% | 3002 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 90% | 58,276 psi | 87% | 3025 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 60,118 psi | 90% | 2989 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 59,886 psi | 90% | 3058 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 57,072 psi | 86% | 3028 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 58,334 psi | 87% | 3087 fps | 97.5% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 58,015 psi | 87% | 2972 fps | 97.5% |
| Bofors RP15 | <<locked>> | 92% | 57,696 psi | 86% | 3012 fps | 99.8% |
| Bofors RP30 | <<locked>> | 98% | 59,959 psi | 90% | 3071 fps | 99.8% |
| Bofors RP5 | <<locked>> | 90% | 58,276 psi | 87% | 3025 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 59,814 psi | 90% | 2949 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 57,682 psi | 86% | 3018 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 82% | 60,089 psi | 90% | 3005 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 57,159 psi | 86% | 2959 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 90% | 59,654 psi | 89% | 2999 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 59,872 psi | 90% | 2927 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 58,668 psi | 88% | 3140 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,855 psi | 57% | 1900 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 58,175 psi | 87% | 2933 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 59,234 psi | 89% | 2946 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,450 psi | 86% | 2936 fps | 99% |
| IMR 7828 SSC | <<locked>> | 92% | 59,843 psi | 90% | 3064 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 50,560 psi | 76% | 2940 fps | 98.8% |
| Lovex S065 | <<locked>> | 82% | 58,740 psi | 88% | 2917 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 57,246 psi | 86% | 2917 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 57,246 psi | 86% | 2913 fps | 100% |
| Norma 204 | <<locked>> | 84% | 59,524 psi | 89% | 2992 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 51,372 psi | 77% | 2966 fps | 99.9% |
| Norma MRP | <<locked>> | 88% | 58,465 psi | 88% | 3045 fps | 100% |
| Norma URP | <<locked>> | 82% | 56,956 psi | 85% | 2936 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 57,130 psi | 86% | 3028 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 59,567 psi | 89% | 2995 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 59,973 psi | 90% | 3018 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,783 psi | 58% | 1942 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 59,205 psi | 89% | 2976 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 57,334 psi | 86% | 3002 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 60,234 psi | 90% | 3136 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 59,857 psi | 90% | 3100 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 88% | 60,017 psi | 90% | 2982 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 88% | 58,958 psi | 88% | 2999 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 59,814 psi | 90% | 2949 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 58,740 psi | 88% | 2917 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 57,246 psi | 86% | 2917 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 57,754 psi | 87% | 2871 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 58,537 psi | 88% | 2992 fps | 99.9% |
| Somchem S361 | <<locked>> | 86% | 58,247 psi | 87% | 2920 fps | 99% |
| Somchem S365 | <<locked>> | 84% | 58,407 psi | 88% | 2940 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 59,611 psi | 89% | 2969 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 58,566 psi | 88% | 2927 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 59,234 psi | 89% | 2949 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 57,928 psi | 87% | 2930 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 58,769 psi | 88% | 2969 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 57,783 psi | 87% | 3041 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 94% | 59,074 psi | 89% | 3035 fps | 99.4% |
| Vihtavuori N568 | <<locked>> | 98% | 60,017 psi | 90% | 3094 fps | 98.9% |
| Vihtavuori N570 | <<locked>> | 98% | 57,087 psi | 86% | 3091 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,783 psi | 87% | 2871 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 60,278 psi | 90% | 3009 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 59,872 psi | 90% | 3081 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 59,234 psi | 89% | 2959 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% | 43,091 psi | 65% | 2677 fps | 99.5% |
| Accurate 4350 | <<locked>> | 80% | 55,724 psi | 84% | 2907 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 43,729 psi | 66% | 2782 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 45,977 psi | 69% | 2789 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 80% | 41,379 psi | 62% | 2723 fps | 96.1% |
| ADI AR 2217 | <<locked>> | 86% | 38,072 psi | 57% | 2641 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 82% | 31,082 psi | 47% | 2503 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 52,359 psi | 78% | 2904 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,963 psi | 69% | 2782 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,293 psi | 63% | 2740 fps | 97.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 41,118 psi | 62% | 2690 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,824 psi | 54% | 2625 fps | 98.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 46,180 psi | 69% | 2854 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 50,299 psi | 75% | 2949 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 48,501 psi | 73% | 2805 fps | 95.2% |
| Bofors RP15 | <<locked>> | 80% | 39,508 psi | 59% | 2677 fps | 96.8% |
| Bofors RP30 | <<locked>> | 84% | 38,261 psi | 57% | 2671 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 42,293 psi | 63% | 2740 fps | 97.7% |
| Bofors RP7 | <<locked>> | 80% | 56,289 psi | 84% | 2897 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 82% | 36,376 psi | 55% | 2602 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 56,304 psi | 84% | 2949 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 44,063 psi | 66% | 2726 fps | 96.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,236 psi | 65% | 2710 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 49,748 psi | 75% | 2782 fps | 100% |
| Hodgdon Retumbo | 65.3 gr | 80% | 35,012 psi | 52% | 2651 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,471 psi | 43% | 1703 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,576 psi | 77% | 2831 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 52,402 psi | 79% | 2848 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,179 psi | 68% | 2720 fps | 96.8% |
| IMR 7828 SSC | <<locked>> | 80% | 40,219 psi | 60% | 2707 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 92% | 39,218 psi | 59% | 2713 fps | 95.9% |
| Lovex S065 | <<locked>> | 80% | 55,347 psi | 83% | 2867 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 53,940 psi | 81% | 2867 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 37,579 psi | 56% | 2562 fps | 98.6% |
| Norma 204 | <<locked>> | 80% | 52,402 psi | 79% | 2884 fps | 99.3% |
| Norma 217 | <<locked>> | 86% | 32,619 psi | 49% | 2566 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 44,817 psi | 67% | 2815 fps | 99.2% |
| Norma URP | <<locked>> | 80% | 53,548 psi | 80% | 2884 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 40,248 psi | 60% | 2720 fps | 96.2% |
| Ramshot Hunter | <<locked>> | 80% | 52,518 psi | 79% | 2887 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,477 psi | 55% | 2602 fps | 96.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,182 psi | 44% | 1742 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 55,448 psi | 83% | 2923 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 53,592 psi | 80% | 2946 fps | 100% |
| ReloadSwiss RS 76 | 69.9 gr | 80% | 34,432 psi | 52% | 2628 fps | 97% |
| ReloadSwiss RS 80 | 77.5 gr | 88% | 41,742 psi | 63% | 2776 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 46,905 psi | 70% | 2762 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 80% | 45,672 psi | 68% | 2772 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 80% | 56,289 psi | 84% | 2897 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 55,347 psi | 83% | 2867 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 53,940 psi | 81% | 2867 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 54,360 psi | 81% | 2818 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 45,324 psi | 68% | 2769 fps | 98.4% |
| Somchem S361 | <<locked>> | 80% | 48,095 psi | 72% | 2753 fps | 97.3% |
| Somchem S365 | <<locked>> | 80% | 51,459 psi | 77% | 2841 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,398 psi | 70% | 2753 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 80% | 54,868 psi | 82% | 2874 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 40,538 psi | 61% | 2628 fps | 97.7% |
| Vihtavuori N550 | <<locked>> | 80% | 54,360 psi | 81% | 2877 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 46,093 psi | 69% | 2772 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 44,454 psi | 67% | 2799 fps | 96.5% |
| Vihtavuori N565 | <<locked>> | 82% | 40,190 psi | 60% | 2690 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 90% | 45,701 psi | 69% | 2848 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 96% | 53,258 psi | 80% | 3025 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 54,143 psi | 81% | 2822 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 56,521 psi | 85% | 2953 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 38,798 psi | 58% | 2749 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,656 psi | 64% | 2680 fps | 97.7% |
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 68 powders for 7 mm STW loaded with the .284 | 150gr | Barnes X BT. Hodgdon Retumbo delivers the highest muzzle velocity at 3,140 fps; across all powders the maximum-charge window runs from 1,900 fps to 3,140 fps. ADI AR 2217 gives the best case fill at 100 %, and 68 of the 68 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (460 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.284" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-33 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, ReloadSwiss RS 80 rank at the top here: for 7 mm STW with the .284 | 150gr | Barnes X 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.