Load Specifications
Load data in caliber 7 mm STW with .284 | 160gr | NorthFork Bonded Core 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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 90% | 56,884 psi | 85% | 2841 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 57,174 psi | 86% | 2858 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 59,654 psi | 89% | 2999 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 88% | 58,276 psi | 87% | 2927 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 56,304 psi | 84% | 2936 fps | 99.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 58,668 psi | 88% | 2966 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 51,169 psi | 77% | 2933 fps | 96.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 53,098 psi | 80% | 2927 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 58,378 psi | 88% | 2913 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 57,812 psi | 87% | 2917 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 90% | 56,695 psi | 85% | 2930 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 58,537 psi | 88% | 2894 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 58,363 psi | 87% | 2963 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 59,350 psi | 89% | 2986 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 56,492 psi | 85% | 2992 fps | 97.7% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 57,232 psi | 86% | 2897 fps | 97.9% |
| Bofors RP15 | <<locked>> | 94% | 59,654 psi | 89% | 2972 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 58,349 psi | 87% | 2976 fps | 99.9% |
| Bofors RP5 | <<locked>> | 90% | 56,695 psi | 85% | 2930 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 58,363 psi | 87% | 2858 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 56,304 psi | 84% | 2930 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 82% | 58,726 psi | 88% | 2913 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 59,625 psi | 89% | 2930 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 90% | 58,421 psi | 88% | 2913 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 58,479 psi | 88% | 2835 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 57,464 psi | 86% | 3048 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 59,756 psi | 90% | 2953 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,492 psi | 56% | 1837 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,014 psi | 85% | 2851 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 59,828 psi | 90% | 2877 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 57,522 psi | 86% | 2851 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 60,075 psi | 90% | 2907 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 92% | 58,610 psi | 88% | 2979 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 48,544 psi | 73% | 2838 fps | 98.9% |
| Lovex S065 | <<locked>> | 82% | 57,159 psi | 86% | 2825 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 59,190 psi | 89% | 2877 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 58,291 psi | 87% | 2858 fps | 100% |
| Norma 204 | <<locked>> | 84% | 58,189 psi | 87% | 2907 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 49,429 psi | 74% | 2867 fps | 99.9% |
| Norma MRP | <<locked>> | 88% | 56,826 psi | 85% | 2946 fps | 100% |
| Norma URP | <<locked>> | 84% | 59,103 psi | 89% | 2894 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 59,930 psi | 90% | 2999 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 84% | 58,030 psi | 87% | 2900 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 58,276 psi | 87% | 2927 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,377 psi | 58% | 1880 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 57,522 psi | 86% | 2884 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 60,060 psi | 90% | 2966 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 58,494 psi | 88% | 3038 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 57,856 psi | 87% | 2999 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 88% | 58,958 psi | 88% | 2897 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 88% | 57,406 psi | 86% | 2904 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 58,363 psi | 87% | 2858 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,159 psi | 86% | 2825 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 59,190 psi | 89% | 2877 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 59,901 psi | 90% | 2831 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 56,985 psi | 85% | 2904 fps | 99.9% |
| Somchem S361 | <<locked>> | 86% | 56,594 psi | 85% | 2828 fps | 99.1% |
| Somchem S365 | <<locked>> | 84% | 56,724 psi | 85% | 2844 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 57,769 psi | 87% | 2874 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 56,884 psi | 85% | 2831 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 57,754 psi | 87% | 2861 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 56,666 psi | 85% | 2871 fps | 96% |
| Vihtavuori N550 | <<locked>> | 84% | 60,002 psi | 90% | 2887 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 56,782 psi | 85% | 2874 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 56,333 psi | 84% | 2946 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 94% | 57,014 psi | 85% | 2936 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 98% | 58,378 psi | 88% | 2999 fps | 99% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 59,712 psi | 90% | 3064 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,376 psi | 85% | 2782 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 58,726 psi | 88% | 2913 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 58,233 psi | 87% | 2982 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 57,769 psi | 87% | 2874 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% | 40,451 psi | 61% | 2569 fps | 99.4% |
| Accurate 4350 | <<locked>> | 80% | 53,432 psi | 80% | 2805 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 41,829 psi | 63% | 2684 fps | 95.7% |
| ADI AR 2209 | <<locked>> | 80% | 44,512 psi | 67% | 2697 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 80% | 39,769 psi | 60% | 2628 fps | 96.2% |
| ADI AR 2217 | <<locked>> | 86% | 36,347 psi | 54% | 2546 fps | 95.3% |
| ADI AR 2218 | <<locked>> | 98% | 47,572 psi | 71% | 2858 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 84% | 30,951 psi | 46% | 2451 fps | 96.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,184 psi | 77% | 2812 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,382 psi | 67% | 2690 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,379 psi | 61% | 2638 fps | 97.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,131 psi | 59% | 2592 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,866 psi | 51% | 2520 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,918 psi | 66% | 2746 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 48,472 psi | 73% | 2854 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 47,297 psi | 71% | 2723 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 37,579 psi | 56% | 2575 fps | 96.7% |
| Bofors RP30 | <<locked>> | 84% | 35,984 psi | 54% | 2562 fps | 95.4% |
| Bofors RP5 | <<locked>> | 80% | 40,379 psi | 61% | 2638 fps | 97.7% |
| Bofors RP7 | <<locked>> | 80% | 54,984 psi | 82% | 2808 fps | 100% |
| Hodgdon H1000 | <<locked>> | 82% | 34,548 psi | 52% | 2507 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 54,824 psi | 82% | 2858 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 42,511 psi | 64% | 2638 fps | 96.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,611 psi | 62% | 2618 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,037 psi | 72% | 2687 fps | 100% |
| Hodgdon Retumbo | 64.5 gr | 80% | 33,054 psi | 50% | 2543 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 55,477 psi | 83% | 2894 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,123 psi | 42% | 1644 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,212 psi | 75% | 2743 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 56,188 psi | 84% | 2828 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 50,502 psi | 76% | 2749 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,700 psi | 66% | 2631 fps | 96.9% |
| IMR 7828 SSC | <<locked>> | 80% | 38,508 psi | 58% | 2612 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 92% | 36,985 psi | 55% | 2605 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 53,650 psi | 80% | 2772 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 52,112 psi | 78% | 2772 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 34,969 psi | 52% | 2451 fps | 98.3% |
| Norma 204 | <<locked>> | 80% | 50,792 psi | 76% | 2789 fps | 99.4% |
| Norma 217 | <<locked>> | 86% | 30,255 psi | 45% | 2448 fps | 95% |
| Norma MRP | <<locked>> | 80% | 42,757 psi | 64% | 2710 fps | 99.2% |
| Norma URP | <<locked>> | 80% | 51,851 psi | 78% | 2789 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 38,392 psi | 58% | 2621 fps | 96.2% |
| Ramshot Hunter | <<locked>> | 80% | 50,821 psi | 76% | 2792 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,432 psi | 52% | 2500 fps | 96.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,805 psi | 43% | 1683 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 53,650 psi | 80% | 2828 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 52,025 psi | 78% | 2851 fps | 100% |
| ReloadSwiss RS 76 | 69 gr | 80% | 32,169 psi | 48% | 2513 fps | 96.6% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 39,392 psi | 59% | 2664 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 45,411 psi | 68% | 2671 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 80% | 43,888 psi | 66% | 2677 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 80% | 54,984 psi | 82% | 2808 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,650 psi | 80% | 2772 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 52,112 psi | 78% | 2772 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,707 psi | 79% | 2730 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,555 psi | 65% | 2674 fps | 98.5% |
| Somchem S361 | <<locked>> | 80% | 46,369 psi | 70% | 2661 fps | 97.4% |
| Somchem S365 | <<locked>> | 80% | 49,559 psi | 74% | 2746 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,411 psi | 67% | 2657 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 80% | 53,301 psi | 80% | 2779 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,682 psi | 58% | 2533 fps | 97.8% |
| Vihtavuori N170 | <<locked>> | 94% | 52,910 psi | 79% | 2812 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 52,634 psi | 79% | 2785 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,685 psi | 65% | 2667 fps | 100% |
| Vihtavuori N560 | 66.9 gr | 80% | 42,598 psi | 64% | 2700 fps | 96.6% |
| Vihtavuori N565 | <<locked>> | 82% | 37,782 psi | 57% | 2579 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 90% | 43,830 psi | 66% | 2746 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 94% | 47,819 psi | 72% | 2861 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,678 psi | 79% | 2733 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 55,071 psi | 83% | 2864 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,550 psi | 55% | 2635 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,857 psi | 61% | 2589 fps | 97.8% |
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 | 160gr | NorthFork Bonded Core. Vihtavuori N570 delivers the highest muzzle velocity at 3,064 fps; across all powders the maximum-charge window runs from 1,837 fps to 3,064 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 160.0 gr projectile in 0.284" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2218, ADI AR 2225 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 | 160gr | NorthFork Bonded Core 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.