Load Specifications
Load data in caliber 7 mm STW with .284 | 166gr | Peregrine VRG-2 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>> | 90% | 57,957 psi | 87% | 2815 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 58,479 psi | 88% | 2835 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 57,159 psi | 86% | 2923 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 88% | 59,785 psi | 90% | 2910 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 58,102 psi | 87% | 2923 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 98% | 56,594 psi | 85% | 2897 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 52,852 psi | 79% | 2936 fps | 97.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 55,013 psi | 82% | 2913 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 59,901 psi | 90% | 2904 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 59,901 psi | 90% | 2904 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 59,843 psi | 90% | 2890 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 59,219 psi | 89% | 2897 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 58,320 psi | 87% | 2917 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 60,031 psi | 90% | 2871 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 56,579 psi | 85% | 2894 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 56,913 psi | 85% | 2907 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 58,595 psi | 88% | 2986 fps | 98.4% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 58,914 psi | 88% | 2884 fps | 98.5% |
| Bofors RP15 | <<locked>> | 92% | 57,711 psi | 87% | 2904 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 60,263 psi | 90% | 2963 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 58,320 psi | 87% | 2917 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 59,654 psi | 89% | 2841 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 58,305 psi | 87% | 2920 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 59,959 psi | 90% | 2890 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 57,159 psi | 86% | 2854 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 90% | 60,075 psi | 90% | 2900 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 59,988 psi | 90% | 2812 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 59,799 psi | 90% | 3038 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,478 psi | 56% | 1814 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 58,349 psi | 87% | 2831 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 58,842 psi | 88% | 2828 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,638 psi | 86% | 2838 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 90% | 56,507 psi | 85% | 2907 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 50,212 psi | 75% | 2828 fps | 99.4% |
| Lovex S065 | <<locked>> | 82% | 58,146 psi | 87% | 2802 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 56,768 psi | 85% | 2805 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 59,640 psi | 89% | 2838 fps | 100% |
| Norma 204 | <<locked>> | 84% | 59,843 psi | 90% | 2890 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 51,256 psi | 77% | 2854 fps | 100% |
| Norma MRP | <<locked>> | 88% | 58,523 psi | 88% | 2930 fps | 100% |
| Norma URP | <<locked>> | 82% | 56,782 psi | 85% | 2818 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 57,696 psi | 86% | 2927 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 84% | 59,698 psi | 89% | 2881 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 55,927 psi | 84% | 2854 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,508 psi | 58% | 1860 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 58,871 psi | 88% | 2861 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 57,769 psi | 87% | 2890 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 56,362 psi | 84% | 2963 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 60,307 psi | 90% | 2995 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 88% | 60,336 psi | 90% | 2881 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 88% | 59,059 psi | 89% | 2890 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 59,654 psi | 89% | 2841 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 58,146 psi | 87% | 2802 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 56,768 psi | 85% | 2805 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 57,101 psi | 86% | 2759 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 58,653 psi | 88% | 2887 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 57,914 psi | 87% | 2815 fps | 99.5% |
| Somchem S365 | <<locked>> | 84% | 58,262 psi | 87% | 2822 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 59,219 psi | 89% | 2858 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 58,305 psi | 87% | 2812 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 59,263 psi | 89% | 2841 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 58,102 psi | 87% | 2861 fps | 96.8% |
| Vihtavuori N550 | <<locked>> | 82% | 57,566 psi | 86% | 2815 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 58,088 psi | 87% | 2848 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 58,015 psi | 87% | 2936 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 94% | 58,653 psi | 88% | 2920 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 96% | 56,347 psi | 84% | 2930 fps | 99.1% |
| Vihtavuori N570 | <<locked>> | 98% | 57,638 psi | 86% | 2992 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,943 psi | 87% | 2762 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 60,205 psi | 90% | 2897 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 55,999 psi | 84% | 2907 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 59,321 psi | 89% | 2854 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% | 41,191 psi | 62% | 2549 fps | 99.7% |
| Accurate 4350 | <<locked>> | 80% | 54,650 psi | 82% | 2785 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 42,873 psi | 64% | 2671 fps | 96.5% |
| ADI AR 2209 | <<locked>> | 80% | 45,542 psi | 68% | 2680 fps | 99% |
| ADI AR 2213 | <<locked>> | 80% | 40,843 psi | 61% | 2618 fps | 97.1% |
| ADI AR 2217 | <<locked>> | 84% | 34,679 psi | 52% | 2477 fps | 95.2% |
| ADI AR 2218 | <<locked>> | 96% | 45,672 psi | 68% | 2789 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 82% | 29,486 psi | 44% | 2379 fps | 96% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 45,963 psi | 69% | 2684 fps | 99.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 45,963 psi | 69% | 2684 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 52,576 psi | 79% | 2789 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,527 psi | 68% | 2677 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,423 psi | 62% | 2625 fps | 98.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,030 psi | 60% | 2569 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,548 psi | 52% | 2500 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 45,397 psi | 68% | 2730 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 46,514 psi | 70% | 2782 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 45,411 psi | 68% | 2657 fps | 95.6% |
| Bofors RP15 | <<locked>> | 80% | 38,537 psi | 58% | 2562 fps | 97.5% |
| Bofors RP30 | <<locked>> | 82% | 34,389 psi | 52% | 2487 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 41,423 psi | 62% | 2625 fps | 98.4% |
| Bofors RP7 | <<locked>> | 80% | 55,985 psi | 84% | 2785 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 32,822 psi | 49% | 2431 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 56,246 psi | 84% | 2841 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 43,395 psi | 65% | 2621 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,656 psi | 64% | 2605 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 49,124 psi | 74% | 2667 fps | 100% |
| Hodgdon Retumbo | 65.7 gr | 80% | 33,692 psi | 51% | 2530 fps | 96.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,079 psi | 42% | 1624 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,213 psi | 77% | 2723 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 51,503 psi | 77% | 2723 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,556 psi | 67% | 2618 fps | 97.6% |
| IMR 7828 SSC | <<locked>> | 80% | 39,392 psi | 59% | 2595 fps | 96.7% |
| IMR 8133 Enduron | <<locked>> | 90% | 35,317 psi | 53% | 2526 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 54,607 psi | 82% | 2753 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 53,272 psi | 80% | 2753 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,259 psi | 53% | 2425 fps | 98.7% |
| Norma 204 | <<locked>> | 80% | 52,083 psi | 78% | 2772 fps | 99.7% |
| Norma 217 | <<locked>> | 86% | 30,864 psi | 46% | 2431 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 43,932 psi | 66% | 2694 fps | 99.6% |
| Norma URP | <<locked>> | 80% | 53,200 psi | 80% | 2769 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 39,305 psi | 59% | 2605 fps | 97.1% |
| Ramshot Hunter | <<locked>> | 80% | 52,112 psi | 78% | 2772 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,259 psi | 53% | 2487 fps | 97.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,906 psi | 43% | 1667 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 54,955 psi | 82% | 2808 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 53,563 psi | 80% | 2831 fps | 100% |
| ReloadSwiss RS 76 | 70.3 gr | 80% | 32,837 psi | 49% | 2500 fps | 97.5% |
| ReloadSwiss RS 80 | 78 gr | 88% | 40,741 psi | 61% | 2657 fps | 96.1% |
| Rottweil R 904 | <<locked>> | 80% | 46,369 psi | 70% | 2657 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 80% | 45,020 psi | 67% | 2664 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 80% | 55,985 psi | 84% | 2785 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 54,607 psi | 82% | 2753 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 53,272 psi | 80% | 2753 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,592 psi | 80% | 2707 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,686 psi | 67% | 2661 fps | 99% |
| Somchem S361 | <<locked>> | 80% | 47,297 psi | 71% | 2644 fps | 98.1% |
| Somchem S365 | <<locked>> | 80% | 50,705 psi | 76% | 2720 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,368 psi | 68% | 2641 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 54,650 psi | 82% | 2759 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 39,581 psi | 59% | 2520 fps | 98.4% |
| Vihtavuori N170 | <<locked>> | 92% | 50,662 psi | 76% | 2743 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 53,824 psi | 81% | 2762 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,541 psi | 67% | 2644 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,700 psi | 66% | 2687 fps | 97.4% |
| Vihtavuori N565 | <<locked>> | 80% | 35,882 psi | 54% | 2500 fps | 95% |
| Vihtavuori N568 | <<locked>> | 88% | 41,930 psi | 63% | 2674 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 92% | 46,021 psi | 69% | 2789 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,925 psi | 81% | 2710 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 56,246 psi | 84% | 2841 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 37,913 psi | 57% | 2615 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,814 psi | 63% | 2572 fps | 98.4% |
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 | 166gr | Peregrine VRG-2. Hodgdon Retumbo delivers the highest muzzle velocity at 3,038 fps; across all powders the maximum-charge window runs from 1,814 fps to 3,038 fps. ADI AR 2218 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 166.0 gr projectile in 0.284" calls for a 1:11.0 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 | 166gr | Peregrine VRG-2 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.