Load Specifications
Load data in caliber 7 mm STW with .284 | 140gr | Swift A-Frame bullet and 72 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 Vihtavuori N560.
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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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% | 57,957 psi | 87% | 3018 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 58,378 psi | 88% | 3048 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 56,623 psi | 85% | 3110 fps | 98.2% |
| ADI AR 2209 | <<locked>> | 90% | 59,509 psi | 89% | 3114 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 92% | 57,580 psi | 86% | 3120 fps | 99.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 55,869 psi | 84% | 3077 fps | 99.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 50,256 psi | 75% | 3035 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 59,669 psi | 89% | 3110 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 86% | 59,306 psi | 89% | 3107 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 58,943 psi | 88% | 3097 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 92% | 57,827 psi | 87% | 3110 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 94% | 59,306 psi | 89% | 3077 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 59,248 psi | 89% | 3143 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 56,130 psi | 84% | 3110 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 58,537 psi | 88% | 3071 fps | 97.1% |
| Bofors RP15 | <<locked>> | 94% | 56,985 psi | 85% | 3097 fps | 99.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 59,248 psi | 89% | 3153 fps | 99.6% |
| Bofors RP5 | <<locked>> | 92% | 57,827 psi | 87% | 3110 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 59,770 psi | 90% | 3048 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 57,479 psi | 86% | 3107 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 84% | 60,002 psi | 90% | 3107 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 58,320 psi | 87% | 3061 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 90% | 57,072 psi | 86% | 3051 fps | 98.5% |
| Hodgdon H4831 SC | <<locked>> | 92% | 59,857 psi | 90% | 3094 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 59,640 psi | 89% | 3025 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 58,059 psi | 87% | 3222 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 56,869 psi | 85% | 3077 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,318 psi | 56% | 1969 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 58,218 psi | 87% | 3035 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 82% | 57,464 psi | 86% | 3015 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 58,581 psi | 88% | 3035 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 57,711 psi | 87% | 3031 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 94% | 59,698 psi | 89% | 3159 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 45,672 psi | 68% | 2933 fps | 97.3% |
| Lovex S065 | <<locked>> | 84% | 58,508 psi | 88% | 3015 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 56,942 psi | 85% | 3012 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 59,132 psi | 89% | 3035 fps | 100% |
| Norma 204 | <<locked>> | 86% | 59,814 psi | 90% | 3097 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 46,296 psi | 69% | 2963 fps | 99.2% |
| Norma MRP | <<locked>> | 90% | 58,015 psi | 87% | 3133 fps | 100% |
| Norma URP | <<locked>> | 86% | 60,307 psi | 90% | 3084 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 56,550 psi | 85% | 3114 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 59,466 psi | 89% | 3091 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 59,741 psi | 90% | 3110 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,116 psi | 57% | 2011 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 58,726 psi | 88% | 3071 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 57,116 psi | 86% | 3097 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 59,828 psi | 90% | 3225 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 59,103 psi | 89% | 3176 fps | 98.8% |
| Rottweil R 904 | <<locked>> | 90% | 60,162 psi | 90% | 3077 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 90% | 58,552 psi | 88% | 3087 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 84% | 59,770 psi | 90% | 3048 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 58,508 psi | 88% | 3015 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 56,942 psi | 85% | 3012 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 57,653 psi | 86% | 2966 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 58,146 psi | 87% | 3084 fps | 99.7% |
| Somchem S361 | <<locked>> | 88% | 58,117 psi | 87% | 3009 fps | 98.7% |
| Somchem S365 | <<locked>> | 86% | 57,638 psi | 86% | 3031 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 59,045 psi | 89% | 3058 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 58,523 psi | 88% | 2953 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 58,175 psi | 87% | 3022 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 58,769 psi | 88% | 3038 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 84% | 57,595 psi | 86% | 3025 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 57,580 psi | 86% | 3058 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 57,580 psi | 86% | 3130 fps | 98.8% |
| Vihtavuori N565 | <<locked>> | 96% | 58,015 psi | 87% | 3110 fps | 99% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 59,509 psi | 89% | 3176 fps | 98.4% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 56,173 psi | 84% | 3163 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 58,001 psi | 87% | 2969 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 60,234 psi | 90% | 3110 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 58,769 psi | 88% | 3166 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 59,132 psi | 89% | 3054 fps | 99.7% |
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% | 38,406 psi | 58% | 2671 fps | 98.3% |
| Accurate 4350 | <<locked>> | 80% | 50,995 psi | 76% | 2936 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 45,745 psi | 69% | 2913 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 42,308 psi | 63% | 2802 fps | 97% |
| ADI AR 2213 | <<locked>> | 82% | 40,582 psi | 61% | 2792 fps | 95% |
| ADI AR 2217 | <<locked>> | 90% | 39,595 psi | 59% | 2759 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 88% | 33,504 psi | 50% | 2651 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 42,801 psi | 64% | 2808 fps | 97.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 48,588 psi | 73% | 2940 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,409 psi | 64% | 2799 fps | 97% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,290 psi | 57% | 2736 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,956 psi | 55% | 2697 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,966 psi | 48% | 2602 fps | 96.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 41,321 psi | 62% | 2848 fps | 99.7% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 51,692 psi | 77% | 2949 fps | 95.5% |
| Bofors RP15 | <<locked>> | 82% | 38,130 psi | 57% | 2730 fps | 95.5% |
| Bofors RP30 | <<locked>> | 88% | 39,030 psi | 59% | 2772 fps | 95.2% |
| Bofors RP5 | <<locked>> | 80% | 38,290 psi | 57% | 2736 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 52,649 psi | 79% | 2936 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 86% | 37,623 psi | 56% | 2717 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 52,373 psi | 79% | 2986 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 80% | 54,621 psi | 82% | 3002 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 82% | 43,366 psi | 65% | 2802 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 82% | 42,525 psi | 64% | 2782 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,847 psi | 69% | 2815 fps | 100% |
| Hodgdon Retumbo | 70.9 gr | 84% | 35,781 psi | 54% | 2753 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 52,924 psi | 79% | 3015 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,891 psi | 42% | 1762 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 48,066 psi | 72% | 2864 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 54,056 psi | 81% | 2959 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 48,124 psi | 72% | 2874 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,829 psi | 63% | 2740 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 84% | 41,945 psi | 63% | 2831 fps | 95.6% |
| IMR 8133 Enduron | <<locked>> | 96% | 39,900 psi | 60% | 2808 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 51,590 psi | 77% | 2907 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,980 psi | 75% | 2897 fps | 99.6% |
| Lovex S071 | <<locked>> | 80% | 32,953 psi | 49% | 2539 fps | 96.5% |
| Norma 204 | <<locked>> | 80% | 48,675 psi | 73% | 2910 fps | 98.3% |
| Norma 217 | <<locked>> | 92% | 34,911 psi | 52% | 2707 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 40,422 psi | 61% | 2812 fps | 97.8% |
| Norma URP | <<locked>> | 80% | 49,487 psi | 74% | 2917 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 39,059 psi | 59% | 2776 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 48,646 psi | 73% | 2917 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 82% | 34,998 psi | 52% | 2648 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,660 psi | 43% | 1808 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 51,126 psi | 77% | 2956 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 49,487 psi | 74% | 2976 fps | 100% |
| ReloadSwiss RS 76 | 74.1 gr | 82% | 32,721 psi | 49% | 2654 fps | 95.1% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 43,207 psi | 65% | 2887 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 43,424 psi | 65% | 2782 fps | 96.2% |
| Rottweil R 905 | <<locked>> | 80% | 41,858 psi | 63% | 2785 fps | 97% |
| Rottweil R 907 | <<locked>> | 80% | 52,649 psi | 79% | 2936 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,590 psi | 77% | 2907 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,980 psi | 75% | 2897 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,517 psi | 76% | 2854 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,510 psi | 62% | 2779 fps | 96.9% |
| Somchem S361 | <<locked>> | 80% | 44,483 psi | 67% | 2769 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 46,963 psi | 70% | 2871 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,337 psi | 63% | 2766 fps | 97.9% |
| Vihtavuori N150 | <<locked>> | 80% | 54,810 psi | 82% | 2900 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 51,082 psi | 77% | 2913 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,825 psi | 55% | 2635 fps | 95.9% |
| Vihtavuori N550 | <<locked>> | 80% | 50,357 psi | 75% | 2910 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 41,394 psi | 62% | 2779 fps | 99.9% |
| Vihtavuori N560 | 71.9 gr | 82% | 43,424 psi | 65% | 2867 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 86% | 41,104 psi | 62% | 2792 fps | 95% |
| Vihtavuori N568 | <<locked>> | 94% | 47,790 psi | 72% | 2972 fps | 95.8% |
| Vihtavuori N570 | <<locked>> | 98% | 52,315 psi | 78% | 3094 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 50,473 psi | 76% | 2864 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 52,547 psi | 79% | 2989 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 33,895 psi | 51% | 2726 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,827 psi | 58% | 2684 fps | 96% |
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 72 powders for 7 mm STW loaded with the .284 | 140gr | Swift A-Frame. ReloadSwiss RS 76 delivers the highest muzzle velocity at 3,225 fps; across all powders the maximum-charge window runs from 1,969 fps to 3,225 fps. ADI AR 2217 gives the best case fill at 100 %, and 72 of the 72 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 140.0 gr projectile in 0.284" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Bofors RP30 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, Vihtavuori N560 rank at the top here: for 7 mm STW with the .284 | 140gr | Swift A-Frame 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.