Load Specifications
Load data in caliber 7 mm STW with .284 | 160gr | Swift A-Frame bullet and 70 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% | 57,928 psi | 87% | 2854 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 58,465 psi | 88% | 2877 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 56,811 psi | 85% | 2956 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 88% | 59,321 psi | 89% | 2946 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 57,624 psi | 86% | 2956 fps | 99.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 60,089 psi | 90% | 2986 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 52,489 psi | 79% | 2963 fps | 96.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,476 psi | 82% | 2946 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 59,393 psi | 89% | 2930 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 58,827 psi | 88% | 2933 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 57,943 psi | 87% | 2949 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 59,640 psi | 89% | 2910 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 59,959 psi | 90% | 2982 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 56,565 psi | 85% | 2946 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 58,015 psi | 87% | 3018 fps | 98% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 58,218 psi | 87% | 2913 fps | 98.1% |
| Bofors RP15 | <<locked>> | 92% | 57,101 psi | 86% | 2936 fps | 99.9% |
| Bofors RP30 | <<locked>> | 98% | 59,843 psi | 90% | 2999 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 57,943 psi | 87% | 2949 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 59,219 psi | 89% | 2874 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 57,711 psi | 87% | 2953 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 59,640 psi | 89% | 2930 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 56,797 psi | 85% | 2890 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 90% | 59,625 psi | 89% | 2930 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 59,654 psi | 89% | 2851 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 58,856 psi | 88% | 3068 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,521 psi | 56% | 1844 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,841 psi | 87% | 2864 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 58,653 psi | 88% | 2867 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,334 psi | 86% | 2871 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 92% | 59,944 psi | 90% | 2999 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 49,922 psi | 75% | 2861 fps | 99.1% |
| Lovex S065 | <<locked>> | 82% | 58,030 psi | 87% | 2841 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 60,292 psi | 90% | 2894 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 59,611 psi | 89% | 2877 fps | 100% |
| Norma 204 | <<locked>> | 84% | 59,466 psi | 89% | 2927 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 50,705 psi | 76% | 2887 fps | 100% |
| Norma MRP | <<locked>> | 88% | 58,131 psi | 87% | 2969 fps | 100% |
| Norma URP | <<locked>> | 84% | 60,292 psi | 90% | 2910 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 57,159 psi | 86% | 2959 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 84% | 59,335 psi | 89% | 2920 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 59,756 psi | 90% | 2946 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,580 psi | 58% | 1890 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 58,668 psi | 88% | 2900 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 57,334 psi | 86% | 2930 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 60,307 psi | 90% | 3061 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 59,480 psi | 89% | 3022 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 88% | 59,959 psi | 90% | 2913 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 88% | 58,465 psi | 88% | 2923 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 59,219 psi | 89% | 2874 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 58,030 psi | 87% | 2841 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 60,292 psi | 90% | 2894 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 57,014 psi | 85% | 2795 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 58,088 psi | 87% | 2920 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 57,638 psi | 86% | 2848 fps | 99.3% |
| Somchem S365 | <<locked>> | 84% | 57,754 psi | 87% | 2861 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 59,016 psi | 88% | 2894 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 58,059 psi | 87% | 2848 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 58,929 psi | 88% | 2877 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 57,899 psi | 87% | 2894 fps | 96.4% |
| Vihtavuori N550 | <<locked>> | 82% | 57,188 psi | 86% | 2851 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 57,943 psi | 87% | 2890 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 57,595 psi | 86% | 2969 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 94% | 58,421 psi | 88% | 2956 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 98% | 60,017 psi | 90% | 3025 fps | 99.3% |
| Vihtavuori N570 | <<locked>> | 98% | 56,884 psi | 85% | 3022 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,609 psi | 86% | 2799 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 59,886 psi | 90% | 2933 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 59,857 psi | 90% | 3002 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 58,958 psi | 88% | 2890 fps | 100% |
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% | 41,452 psi | 62% | 2592 fps | 99.6% |
| Accurate 4350 | <<locked>> | 80% | 54,708 psi | 82% | 2828 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 42,844 psi | 64% | 2703 fps | 96.1% |
| ADI AR 2209 | <<locked>> | 80% | 45,382 psi | 68% | 2717 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 80% | 40,741 psi | 61% | 2651 fps | 96.6% |
| ADI AR 2217 | <<locked>> | 86% | 37,159 psi | 56% | 2569 fps | 95.8% |
| ADI AR 2218 | <<locked>> | 98% | 48,820 psi | 73% | 2887 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 82% | 29,573 psi | 44% | 2411 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 52,054 psi | 78% | 2825 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,411 psi | 68% | 2710 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,408 psi | 62% | 2661 fps | 98.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,030 psi | 60% | 2605 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,621 psi | 52% | 2539 fps | 99.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 45,266 psi | 68% | 2769 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 46,224 psi | 69% | 2812 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 45,092 psi | 68% | 2680 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 38,406 psi | 58% | 2595 fps | 97.1% |
| Bofors RP30 | <<locked>> | 84% | 36,956 psi | 55% | 2585 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 41,408 psi | 62% | 2661 fps | 98.1% |
| Bofors RP7 | <<locked>> | 80% | 55,637 psi | 83% | 2822 fps | 100% |
| Hodgdon H1000 | <<locked>> | 82% | 35,230 psi | 53% | 2523 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 55,999 psi | 84% | 2877 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 43,294 psi | 65% | 2654 fps | 96.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,583 psi | 64% | 2641 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 49,008 psi | 73% | 2703 fps | 100% |
| Hodgdon Retumbo | 65.7 gr | 80% | 33,779 psi | 51% | 2566 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,152 psi | 42% | 1650 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,039 psi | 77% | 2759 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 51,430 psi | 77% | 2766 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,454 psi | 67% | 2648 fps | 97.2% |
| IMR 7828 SSC | <<locked>> | 80% | 39,334 psi | 59% | 2631 fps | 96.2% |
| IMR 8133 Enduron | <<locked>> | 90% | 35,375 psi | 53% | 2562 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 54,534 psi | 82% | 2789 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 52,997 psi | 79% | 2789 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,650 psi | 53% | 2467 fps | 98.5% |
| Norma 204 | <<locked>> | 80% | 51,866 psi | 78% | 2812 fps | 99.5% |
| Norma 217 | <<locked>> | 86% | 31,096 psi | 47% | 2470 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 43,830 psi | 66% | 2730 fps | 99.4% |
| Norma URP | <<locked>> | 80% | 52,808 psi | 79% | 2805 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 39,233 psi | 59% | 2641 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 80% | 51,924 psi | 78% | 2808 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,317 psi | 53% | 2523 fps | 97.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,834 psi | 43% | 1690 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 54,810 psi | 82% | 2848 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 53,185 psi | 80% | 2867 fps | 100% |
| ReloadSwiss RS 76 | 70.3 gr | 80% | 32,953 psi | 49% | 2536 fps | 97.1% |
| ReloadSwiss RS 80 | 78 gr | 88% | 40,640 psi | 61% | 2690 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 46,238 psi | 69% | 2690 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 80% | 44,976 psi | 67% | 2700 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 80% | 55,637 psi | 83% | 2822 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 54,534 psi | 82% | 2789 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 52,997 psi | 79% | 2789 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,519 psi | 80% | 2746 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,628 psi | 67% | 2697 fps | 98.8% |
| Somchem S361 | <<locked>> | 80% | 47,239 psi | 71% | 2677 fps | 97.7% |
| Somchem S365 | <<locked>> | 80% | 50,589 psi | 76% | 2762 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,426 psi | 68% | 2677 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 54,447 psi | 82% | 2799 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 39,624 psi | 59% | 2552 fps | 98.1% |
| Vihtavuori N170 | <<locked>> | 94% | 54,099 psi | 81% | 2835 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 53,708 psi | 81% | 2802 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,657 psi | 67% | 2687 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,598 psi | 65% | 2723 fps | 97% |
| Vihtavuori N565 | <<locked>> | 82% | 38,711 psi | 58% | 2602 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 88% | 41,829 psi | 63% | 2707 fps | 95.4% |
| Vihtavuori N570 | <<locked>> | 94% | 49,197 psi | 74% | 2884 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,664 psi | 80% | 2746 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 55,999 psi | 84% | 2877 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 37,797 psi | 57% | 2657 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,611 psi | 62% | 2605 fps | 98.1% |
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 76 powders for 7 mm STW loaded with the .284 | 160gr | Swift A-Frame. Hodgdon Retumbo delivers the highest muzzle velocity at 3,068 fps; across all powders the maximum-charge window runs from 1,844 fps to 3,068 fps. Accurate 8700 gives the best case fill at 100 %, and 76 of the 76 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 160.0 gr projectile in 0.284" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, ADI AR 2217, ADI AR 2218 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 | 160gr | Swift A-Frame they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 8700, Lovex D100, Shooters World 50 BMG burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.