Load Specifications
Load data in caliber 7 mm STW with .284 | 170gr | CutEdge MTH 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 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>> | 92% | 60,307 psi | 90% | 2812 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,985 psi | 85% | 2782 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 59,596 psi | 89% | 2927 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 88% | 58,218 psi | 87% | 2851 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 56,405 psi | 85% | 2867 fps | 99.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 58,682 psi | 88% | 2894 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 51,111 psi | 77% | 2871 fps | 97% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 53,069 psi | 80% | 2858 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 58,334 psi | 87% | 2838 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 57,740 psi | 87% | 2841 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 56,666 psi | 85% | 2858 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 58,218 psi | 87% | 2818 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 58,421 psi | 88% | 2887 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 59,219 psi | 89% | 2907 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 56,260 psi | 84% | 2920 fps | 98.1% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 57,217 psi | 86% | 2828 fps | 98.3% |
| Bofors RP15 | <<locked>> | 94% | 59,741 psi | 90% | 2900 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 58,102 psi | 87% | 2904 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 56,666 psi | 85% | 2858 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 58,320 psi | 87% | 2782 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 56,405 psi | 85% | 2861 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 58,436 psi | 88% | 2838 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 59,727 psi | 90% | 2861 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 90% | 58,494 psi | 88% | 2841 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 58,378 psi | 88% | 2759 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 57,334 psi | 86% | 2972 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 59,596 psi | 89% | 2877 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,521 psi | 56% | 1781 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 56,971 psi | 85% | 2776 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 59,712 psi | 90% | 2802 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 57,290 psi | 86% | 2776 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 59,843 psi | 90% | 2835 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 92% | 58,552 psi | 88% | 2904 fps | 99.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 48,428 psi | 73% | 2769 fps | 99.2% |
| Lovex S065 | <<locked>> | 82% | 57,029 psi | 85% | 2749 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 58,943 psi | 88% | 2802 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 57,696 psi | 86% | 2779 fps | 100% |
| Norma 204 | <<locked>> | 84% | 58,320 psi | 87% | 2835 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 49,124 psi | 74% | 2792 fps | 100% |
| Norma MRP | <<locked>> | 88% | 56,811 psi | 85% | 2877 fps | 100% |
| Norma URP | <<locked>> | 84% | 58,958 psi | 88% | 2815 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 60,060 psi | 90% | 2927 fps | 100% |
| Ramshot Hunter | <<locked>> | 84% | 58,117 psi | 87% | 2828 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 58,175 psi | 87% | 2854 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,392 psi | 58% | 1821 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 57,159 psi | 86% | 2805 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 60,118 psi | 90% | 2887 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 58,436 psi | 88% | 2963 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 57,740 psi | 87% | 2930 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 88% | 58,842 psi | 88% | 2822 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 88% | 57,203 psi | 86% | 2828 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 58,320 psi | 87% | 2782 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,029 psi | 85% | 2749 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 58,943 psi | 88% | 2802 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 59,756 psi | 90% | 2759 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 56,797 psi | 85% | 2828 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 56,579 psi | 85% | 2759 fps | 99.4% |
| Somchem S365 | <<locked>> | 86% | 60,350 psi | 90% | 2815 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 57,566 psi | 86% | 2802 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 56,942 psi | 85% | 2759 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 57,551 psi | 86% | 2789 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 56,449 psi | 85% | 2802 fps | 96.5% |
| Vihtavuori N550 | <<locked>> | 84% | 59,944 psi | 90% | 2812 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 60,292 psi | 90% | 2844 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 60,365 psi | 90% | 2936 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 94% | 56,826 psi | 85% | 2864 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 98% | 58,175 psi | 87% | 2930 fps | 99.3% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 59,611 psi | 89% | 2992 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 60,350 psi | 90% | 2759 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 58,682 psi | 88% | 2841 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 57,943 psi | 87% | 2904 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 57,537 psi | 86% | 2799 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% | 39,885 psi | 60% | 2497 fps | 99.6% |
| Accurate 4350 | <<locked>> | 80% | 53,113 psi | 80% | 2730 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 41,568 psi | 62% | 2615 fps | 96.2% |
| ADI AR 2209 | <<locked>> | 80% | 44,396 psi | 67% | 2628 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 80% | 39,624 psi | 59% | 2566 fps | 96.8% |
| ADI AR 2217 | <<locked>> | 86% | 36,056 psi | 54% | 2484 fps | 95.9% |
| ADI AR 2218 | <<locked>> | 98% | 47,340 psi | 71% | 2795 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 82% | 28,485 psi | 43% | 2326 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,169 psi | 77% | 2740 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,251 psi | 66% | 2621 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,147 psi | 60% | 2572 fps | 98.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,783 psi | 58% | 2516 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,504 psi | 50% | 2451 fps | 99.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,685 psi | 65% | 2674 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 44,628 psi | 67% | 2720 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 44,237 psi | 66% | 2602 fps | 95.2% |
| Bofors RP15 | <<locked>> | 80% | 37,260 psi | 56% | 2507 fps | 97.2% |
| Bofors RP30 | <<locked>> | 84% | 35,592 psi | 53% | 2493 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 40,147 psi | 60% | 2572 fps | 98.1% |
| Bofors RP7 | <<locked>> | 80% | 54,549 psi | 82% | 2730 fps | 100% |
| Hodgdon H1000 | <<locked>> | 82% | 34,171 psi | 51% | 2441 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 54,650 psi | 82% | 2782 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 42,221 psi | 63% | 2569 fps | 96.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,466 psi | 62% | 2552 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,993 psi | 72% | 2618 fps | 100% |
| Hodgdon Retumbo | 62.9 gr | 80% | 32,576 psi | 49% | 2474 fps | 96.3% |
| Hodgdon Superformance | <<locked>> | 80% | 55,405 psi | 83% | 2818 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,065 psi | 42% | 1591 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,125 psi | 75% | 2671 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 56,173 psi | 84% | 2753 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 50,241 psi | 75% | 2674 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,555 psi | 65% | 2566 fps | 97.4% |
| IMR 7828 SSC | <<locked>> | 80% | 38,319 psi | 57% | 2546 fps | 96.4% |
| IMR 8133 Enduron | <<locked>> | 90% | 34,026 psi | 51% | 2474 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 53,403 psi | 80% | 2700 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,895 psi | 78% | 2697 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 34,243 psi | 51% | 2379 fps | 98.6% |
| Norma 204 | <<locked>> | 80% | 50,647 psi | 76% | 2720 fps | 99.6% |
| Norma 217 | <<locked>> | 86% | 29,733 psi | 45% | 2382 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 42,453 psi | 64% | 2638 fps | 99.5% |
| Norma URP | <<locked>> | 80% | 51,692 psi | 77% | 2713 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 38,116 psi | 57% | 2552 fps | 96.8% |
| Ramshot Hunter | <<locked>> | 80% | 50,618 psi | 76% | 2720 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,040 psi | 51% | 2434 fps | 97.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,747 psi | 43% | 1631 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 53,403 psi | 80% | 2753 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 52,054 psi | 78% | 2779 fps | 100% |
| ReloadSwiss RS 76 | 67.4 gr | 80% | 31,763 psi | 48% | 2451 fps | 97.2% |
| ReloadSwiss RS 80 | 74.7 gr | 88% | 39,044 psi | 59% | 2598 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 45,252 psi | 68% | 2602 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 80% | 43,656 psi | 65% | 2608 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 80% | 54,549 psi | 82% | 2730 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,403 psi | 80% | 2700 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,895 psi | 78% | 2697 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,286 psi | 78% | 2654 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,323 psi | 65% | 2602 fps | 98.8% |
| Somchem S361 | <<locked>> | 80% | 46,166 psi | 69% | 2592 fps | 97.9% |
| Somchem S365 | <<locked>> | 80% | 49,371 psi | 74% | 2671 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,121 psi | 66% | 2589 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 53,214 psi | 80% | 2707 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,406 psi | 58% | 2467 fps | 98.1% |
| Vihtavuori N170 | <<locked>> | 94% | 52,736 psi | 79% | 2743 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 52,547 psi | 79% | 2713 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,250 psi | 65% | 2595 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 42,322 psi | 63% | 2631 fps | 97.1% |
| Vihtavuori N565 | <<locked>> | 82% | 37,318 psi | 56% | 2510 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 88% | 40,350 psi | 60% | 2615 fps | 95.4% |
| Vihtavuori N570 | <<locked>> | 94% | 47,776 psi | 72% | 2799 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,692 psi | 79% | 2661 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 54,897 psi | 82% | 2789 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,216 psi | 54% | 2559 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,480 psi | 61% | 2516 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 78 powders for 7 mm STW loaded with the .284 | 170gr | CutEdge MTH. Vihtavuori N570 delivers the highest muzzle velocity at 2,992 fps; across all powders the maximum-charge window runs from 1,781 fps to 2,992 fps. Accurate 8700 gives the best case fill at 100 %, and 78 of the 78 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 170.0 gr projectile in 0.284" calls for a 1:9.0 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 | 170gr | CutEdge MTH 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.