Load Specifications
Load data in caliber 7 mm STW with .284 | 157gr | CutEdge MTAC bullet and 73 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.
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% | 57,566 psi | 86% | 2877 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 58,189 psi | 87% | 2904 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 56,637 psi | 85% | 2979 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 90% | 59,582 psi | 89% | 2972 fps | 100% |
| ADI AR 2213 | <<locked>> | 92% | 57,740 psi | 87% | 2982 fps | 99.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 55,883 psi | 84% | 2949 fps | 99.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 50,053 psi | 75% | 2904 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 86% | 59,524 psi | 89% | 2959 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 58,987 psi | 88% | 2959 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 57,856 psi | 87% | 2976 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 59,219 psi | 89% | 2933 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 59,335 psi | 89% | 3005 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 55,999 psi | 84% | 2969 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 52,866 psi | 79% | 2959 fps | 96.6% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 58,581 psi | 88% | 2940 fps | 97.9% |
| Bofors RP15 | <<locked>> | 94% | 56,768 psi | 85% | 2959 fps | 99.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 58,958 psi | 88% | 3012 fps | 99.8% |
| Bofors RP5 | <<locked>> | 92% | 57,856 psi | 87% | 2976 fps | 99.9% |
| Bofors RP7 | <<locked>> | 84% | 59,857 psi | 90% | 2904 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 57,508 psi | 86% | 2972 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 84% | 60,104 psi | 90% | 2963 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 58,349 psi | 87% | 2917 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 57,000 psi | 85% | 2917 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 92% | 60,002 psi | 90% | 2959 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 59,611 psi | 89% | 2877 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 58,363 psi | 87% | 3087 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 56,942 psi | 85% | 2940 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,246 psi | 56% | 1847 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 58,218 psi | 87% | 2894 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 57,711 psi | 87% | 2874 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 58,697 psi | 88% | 2894 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 57,682 psi | 86% | 2897 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 94% | 59,814 psi | 90% | 3022 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 45,527 psi | 68% | 2808 fps | 98.1% |
| Lovex S065 | <<locked>> | 84% | 58,465 psi | 88% | 2871 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 56,724 psi | 85% | 2867 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 58,842 psi | 88% | 2894 fps | 100% |
| Norma 204 | <<locked>> | 86% | 59,712 psi | 90% | 2953 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 46,006 psi | 69% | 2835 fps | 99.6% |
| Norma MRP | <<locked>> | 90% | 57,943 psi | 87% | 2992 fps | 100% |
| Norma URP | <<locked>> | 84% | 56,565 psi | 85% | 2887 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 56,753 psi | 85% | 2979 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 86% | 59,350 psi | 89% | 2946 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 59,698 psi | 89% | 2972 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,072 psi | 57% | 1890 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 58,624 psi | 88% | 2927 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 57,392 psi | 86% | 2959 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 59,495 psi | 89% | 3081 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 58,697 psi | 88% | 3041 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 90% | 60,321 psi | 90% | 2940 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 90% | 58,465 psi | 88% | 2946 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 84% | 59,857 psi | 90% | 2904 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 58,465 psi | 88% | 2871 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 56,724 psi | 85% | 2867 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 57,624 psi | 86% | 2828 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 58,044 psi | 87% | 2943 fps | 99.9% |
| Somchem S361 | <<locked>> | 88% | 57,972 psi | 87% | 2874 fps | 99.2% |
| Somchem S365 | <<locked>> | 86% | 57,551 psi | 86% | 2887 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 58,972 psi | 88% | 2920 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 58,450 psi | 88% | 2805 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 58,233 psi | 87% | 2877 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 58,885 psi | 88% | 2900 fps | 100% |
| Vihtavuori N170 | <<locked>> | 98% | 57,711 psi | 87% | 2910 fps | 95.9% |
| Vihtavuori N550 | <<locked>> | 84% | 57,508 psi | 86% | 2884 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 57,392 psi | 86% | 2910 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 57,522 psi | 86% | 2992 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 96% | 57,725 psi | 87% | 2972 fps | 99.4% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 59,321 psi | 89% | 3041 fps | 99% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 56,202 psi | 84% | 3035 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 58,001 psi | 87% | 2828 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 60,104 psi | 90% | 2963 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 58,871 psi | 88% | 3022 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 59,001 psi | 88% | 2917 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% | 37,971 psi | 57% | 2546 fps | 98.9% |
| Accurate 4350 | <<locked>> | 80% | 50,792 psi | 76% | 2795 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 42,221 psi | 63% | 2717 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 80% | 42,279 psi | 63% | 2677 fps | 97.8% |
| ADI AR 2213 | <<locked>> | 80% | 37,652 psi | 56% | 2605 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 88% | 36,637 psi | 55% | 2575 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 86% | 30,995 psi | 46% | 2477 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 48,747 psi | 73% | 2802 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,366 psi | 64% | 2674 fps | 97.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,029 psi | 57% | 2612 fps | 96.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,825 psi | 55% | 2572 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,691 psi | 48% | 2487 fps | 97.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 41,104 psi | 62% | 2720 fps | 99.9% |
| Alliant Reloder-33 | <<locked>> | 98% | 48,921 psi | 73% | 2887 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 48,428 psi | 73% | 2766 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 35,447 psi | 53% | 2549 fps | 95.6% |
| Bofors RP30 | <<locked>> | 86% | 36,071 psi | 54% | 2589 fps | 95.2% |
| Bofors RP5 | <<locked>> | 80% | 38,029 psi | 57% | 2612 fps | 96.7% |
| Bofors RP7 | <<locked>> | 80% | 52,692 psi | 79% | 2799 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 34,896 psi | 52% | 2536 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 52,417 psi | 79% | 2848 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 54,650 psi | 82% | 2861 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 80% | 40,335 psi | 60% | 2618 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 39,465 psi | 59% | 2598 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,818 psi | 69% | 2680 fps | 100% |
| Hodgdon Retumbo | 65.4 gr | 82% | 33,156 psi | 50% | 2569 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 52,736 psi | 79% | 2877 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,934 psi | 42% | 1657 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 48,051 psi | 72% | 2733 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 54,114 psi | 81% | 2822 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 47,979 psi | 72% | 2736 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,727 psi | 63% | 2615 fps | 96.1% |
| IMR 7828 SSC | <<locked>> | 82% | 38,986 psi | 58% | 2648 fps | 95.7% |
| IMR 8133 Enduron | <<locked>> | 94% | 36,782 psi | 55% | 2621 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 51,547 psi | 77% | 2769 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,966 psi | 75% | 2766 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 32,474 psi | 49% | 2418 fps | 97.3% |
| Norma 204 | <<locked>> | 80% | 48,544 psi | 73% | 2776 fps | 98.9% |
| Norma 217 | <<locked>> | 90% | 32,111 psi | 48% | 2526 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 40,219 psi | 60% | 2684 fps | 98.6% |
| Norma URP | <<locked>> | 80% | 49,617 psi | 74% | 2782 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 38,812 psi | 58% | 2654 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 80% | 48,472 psi | 73% | 2779 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 32,140 psi | 48% | 2467 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,572 psi | 43% | 1693 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,981 psi | 76% | 2815 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 49,472 psi | 74% | 2838 fps | 100% |
| ReloadSwiss RS 76 | 70 gr | 82% | 32,329 psi | 48% | 2543 fps | 96.4% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 42,960 psi | 64% | 2766 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 43,497 psi | 65% | 2657 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 80% | 41,713 psi | 63% | 2661 fps | 97.9% |
| Rottweil R 907 | <<locked>> | 80% | 52,692 psi | 79% | 2799 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,547 psi | 77% | 2769 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,966 psi | 75% | 2766 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,473 psi | 76% | 2720 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,379 psi | 62% | 2654 fps | 97.8% |
| Somchem S361 | <<locked>> | 80% | 44,251 psi | 66% | 2644 fps | 96.6% |
| Somchem S365 | <<locked>> | 80% | 46,862 psi | 70% | 2733 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,018 psi | 63% | 2638 fps | 98.6% |
| Vihtavuori N150 | <<locked>> | 80% | 54,911 psi | 82% | 2759 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 51,126 psi | 77% | 2776 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,651 psi | 55% | 2513 fps | 96.9% |
| Vihtavuori N170 | <<locked>> | 96% | 53,925 psi | 81% | 2851 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 50,241 psi | 75% | 2776 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 41,002 psi | 61% | 2644 fps | 100% |
| Vihtavuori N560 | 66.2 gr | 80% | 40,205 psi | 60% | 2674 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 84% | 37,869 psi | 57% | 2605 fps | 95% |
| Vihtavuori N568 | <<locked>> | 92% | 44,077 psi | 66% | 2779 fps | 95.7% |
| Vihtavuori N570 | <<locked>> | 98% | 52,083 psi | 78% | 2963 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 50,444 psi | 76% | 2726 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 52,605 psi | 79% | 2851 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 33,663 psi | 50% | 2602 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,624 psi | 58% | 2562 fps | 96.9% |
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 73 powders for 7 mm STW loaded with the .284 | 157gr | CutEdge MTAC. Hodgdon Retumbo delivers the highest muzzle velocity at 3,087 fps; across all powders the maximum-charge window runs from 1,847 fps to 3,087 fps. ADI AR 2217 gives the best case fill at 100 %, and 73 of the 73 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 157.0 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 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, Vihtavuori N560 rank at the top here: for 7 mm STW with the .284 | 157gr | CutEdge MTAC 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.