Load Specifications
Load data in caliber 7 mm STW with .284 | 160gr | Woodleigh PP SN 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% | 58,363 psi | 87% | 2861 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 58,682 psi | 88% | 2884 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 57,261 psi | 86% | 2966 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 88% | 59,770 psi | 90% | 2953 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 58,044 psi | 87% | 2963 fps | 99.7% |
| ADI AR 2217 | <<locked>> | 98% | 56,492 psi | 85% | 2933 fps | 99.8% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 52,982 psi | 79% | 2969 fps | 97.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 55,071 psi | 83% | 2956 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 59,915 psi | 90% | 2936 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 59,263 psi | 89% | 2940 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 58,407 psi | 88% | 2956 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 60,133 psi | 90% | 2917 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 56,507 psi | 85% | 2936 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 57,014 psi | 85% | 2949 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 58,668 psi | 88% | 3025 fps | 98.2% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 58,755 psi | 88% | 2923 fps | 98.2% |
| Bofors RP15 | <<locked>> | 92% | 57,566 psi | 86% | 2943 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 60,220 psi | 90% | 3005 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 58,407 psi | 88% | 2956 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 59,698 psi | 89% | 2881 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 58,131 psi | 87% | 2956 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 60,104 psi | 90% | 2936 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 57,203 psi | 86% | 2897 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 90% | 60,046 psi | 90% | 2940 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 59,915 psi | 90% | 2854 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 59,553 psi | 89% | 3077 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,565 psi | 56% | 1847 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 58,247 psi | 87% | 2871 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 58,900 psi | 88% | 2871 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,725 psi | 87% | 2877 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 90% | 56,231 psi | 84% | 2943 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 50,546 psi | 76% | 2871 fps | 99.2% |
| Lovex S065 | <<locked>> | 82% | 58,479 psi | 88% | 2848 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 56,869 psi | 85% | 2848 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 60,031 psi | 90% | 2884 fps | 100% |
| Norma 204 | <<locked>> | 84% | 59,669 psi | 89% | 2930 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 51,358 psi | 77% | 2894 fps | 100% |
| Norma MRP | <<locked>> | 88% | 58,595 psi | 88% | 2972 fps | 100% |
| Norma URP | <<locked>> | 82% | 56,826 psi | 85% | 2864 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 57,609 psi | 86% | 2966 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 84% | 59,538 psi | 89% | 2923 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 56,130 psi | 84% | 2897 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,624 psi | 58% | 1893 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 59,132 psi | 89% | 2907 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 57,566 psi | 86% | 2930 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 56,405 psi | 85% | 3009 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 60,118 psi | 90% | 3031 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 86% | 56,478 psi | 85% | 2864 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 88% | 58,929 psi | 88% | 2930 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 59,698 psi | 89% | 2881 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 58,479 psi | 88% | 2848 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 56,869 psi | 85% | 2848 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 57,435 psi | 86% | 2802 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 58,523 psi | 88% | 2927 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 58,001 psi | 87% | 2854 fps | 99.4% |
| Somchem S365 | <<locked>> | 84% | 58,262 psi | 87% | 2864 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 59,437 psi | 89% | 2900 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 58,262 psi | 87% | 2851 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 59,306 psi | 89% | 2884 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 58,421 psi | 88% | 2900 fps | 96.5% |
| Vihtavuori N550 | <<locked>> | 82% | 57,609 psi | 86% | 2858 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 58,436 psi | 88% | 2897 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 58,015 psi | 87% | 2976 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 94% | 58,827 psi | 88% | 2966 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 96% | 56,275 psi | 84% | 2969 fps | 98.8% |
| Vihtavuori N570 | <<locked>> | 98% | 57,493 psi | 86% | 3028 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 58,015 psi | 87% | 2802 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 60,350 psi | 90% | 2940 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 60,365 psi | 90% | 3005 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 59,335 psi | 89% | 2897 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% | 41,698 psi | 63% | 2595 fps | 99.6% |
| Accurate 4350 | <<locked>> | 80% | 54,955 psi | 82% | 2828 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 43,062 psi | 65% | 2710 fps | 96.2% |
| ADI AR 2209 | <<locked>> | 80% | 45,600 psi | 68% | 2720 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 80% | 40,959 psi | 61% | 2657 fps | 96.7% |
| ADI AR 2217 | <<locked>> | 86% | 37,478 psi | 56% | 2579 fps | 96% |
| ADI AR 2218 | <<locked>> | 98% | 49,313 psi | 74% | 2897 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 82% | 29,878 psi | 45% | 2421 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 52,547 psi | 79% | 2835 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,629 psi | 68% | 2713 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,640 psi | 62% | 2664 fps | 98.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,466 psi | 61% | 2615 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,824 psi | 52% | 2543 fps | 99.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 45,542 psi | 68% | 2772 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 46,775 psi | 70% | 2822 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 45,382 psi | 68% | 2687 fps | 95.1% |
| Bofors RP15 | <<locked>> | 80% | 38,798 psi | 58% | 2602 fps | 97.2% |
| Bofors RP30 | <<locked>> | 82% | 34,751 psi | 52% | 2530 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 41,640 psi | 62% | 2664 fps | 98.1% |
| Bofors RP7 | <<locked>> | 80% | 56,072 psi | 84% | 2828 fps | 100% |
| Hodgdon H1000 | <<locked>> | 82% | 35,578 psi | 53% | 2533 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 56,202 psi | 84% | 2881 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 43,526 psi | 65% | 2657 fps | 96.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,815 psi | 64% | 2644 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 49,487 psi | 74% | 2713 fps | 100% |
| Hodgdon Retumbo | 66.2 gr | 80% | 34,142 psi | 51% | 2575 fps | 96.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,253 psi | 42% | 1657 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,256 psi | 77% | 2762 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 51,880 psi | 78% | 2772 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,657 psi | 67% | 2654 fps | 97.3% |
| IMR 7828 SSC | <<locked>> | 80% | 39,711 psi | 60% | 2638 fps | 96.4% |
| IMR 8133 Enduron | <<locked>> | 90% | 35,752 psi | 54% | 2572 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 54,998 psi | 82% | 2799 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 53,476 psi | 80% | 2795 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,882 psi | 54% | 2474 fps | 98.6% |
| Norma 204 | <<locked>> | 80% | 52,098 psi | 78% | 2812 fps | 99.6% |
| Norma 217 | <<locked>> | 86% | 31,430 psi | 47% | 2480 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 44,266 psi | 66% | 2736 fps | 99.5% |
| Norma URP | <<locked>> | 80% | 53,316 psi | 80% | 2812 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 39,639 psi | 59% | 2648 fps | 96.8% |
| Ramshot Hunter | <<locked>> | 80% | 52,156 psi | 78% | 2815 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,549 psi | 53% | 2526 fps | 97.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,935 psi | 43% | 1693 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 55,056 psi | 83% | 2851 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 53,679 psi | 80% | 2877 fps | 100% |
| ReloadSwiss RS 76 | 70.8 gr | 80% | 33,301 psi | 50% | 2546 fps | 97.3% |
| ReloadSwiss RS 80 | 78.5 gr | 88% | 41,031 psi | 62% | 2700 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 46,644 psi | 70% | 2697 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 80% | 45,194 psi | 68% | 2703 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 80% | 56,072 psi | 84% | 2828 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 54,998 psi | 82% | 2799 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 53,476 psi | 80% | 2795 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,722 psi | 81% | 2749 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,860 psi | 67% | 2700 fps | 98.8% |
| Somchem S361 | <<locked>> | 80% | 47,572 psi | 71% | 2687 fps | 97.8% |
| Somchem S365 | <<locked>> | 80% | 50,894 psi | 76% | 2766 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,614 psi | 68% | 2680 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 54,679 psi | 82% | 2802 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 39,856 psi | 60% | 2559 fps | 98.2% |
| Vihtavuori N170 | <<locked>> | 94% | 54,621 psi | 82% | 2841 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 53,954 psi | 81% | 2805 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,918 psi | 67% | 2690 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 44,019 psi | 66% | 2730 fps | 97.1% |
| Vihtavuori N565 | <<locked>> | 82% | 39,102 psi | 59% | 2608 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 88% | 42,206 psi | 63% | 2713 fps | 95.5% |
| Vihtavuori N570 | <<locked>> | 94% | 49,777 psi | 75% | 2897 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 54,070 psi | 81% | 2753 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 56,449 psi | 85% | 2884 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 38,116 psi | 57% | 2661 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,018 psi | 63% | 2612 fps | 98.2% |
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 70 powders for 7 mm STW loaded with the .284 | 160gr | Woodleigh PP SN. Hodgdon Retumbo delivers the highest muzzle velocity at 3,077 fps; across all powders the maximum-charge window runs from 1,847 fps to 3,077 fps. ADI AR 2218 gives the best case fill at 100 %, and 70 of the 70 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 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2218, 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, ReloadSwiss RS 80 rank at the top here: for 7 mm STW with the .284 | 160gr | Woodleigh PP SN 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.