Load Specifications
Load data in caliber 7 mm STW with .284 | 160gr | Peregrine VRG-3 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% | 56,333 psi | 84% | 2841 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,913 psi | 85% | 2864 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 59,741 psi | 90% | 3005 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 88% | 58,218 psi | 87% | 2933 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 56,420 psi | 85% | 2943 fps | 99.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 58,827 psi | 88% | 2972 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 51,140 psi | 77% | 2940 fps | 96.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 53,127 psi | 80% | 2930 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 58,262 psi | 87% | 2920 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 57,711 psi | 87% | 2920 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 56,666 psi | 85% | 2933 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 58,291 psi | 87% | 2897 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 58,610 psi | 88% | 2966 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 59,480 psi | 89% | 2989 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 56,478 psi | 85% | 2995 fps | 97.7% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 57,450 psi | 86% | 2907 fps | 98% |
| Bofors RP15 | <<locked>> | 94% | 59,843 psi | 90% | 2979 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 58,363 psi | 87% | 2982 fps | 99.9% |
| Bofors RP5 | <<locked>> | 90% | 56,666 psi | 85% | 2933 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 58,349 psi | 87% | 2864 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 56,463 psi | 85% | 2936 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 82% | 58,450 psi | 88% | 2917 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 59,712 psi | 90% | 2936 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 90% | 58,508 psi | 88% | 2917 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 58,465 psi | 88% | 2841 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 57,711 psi | 87% | 3054 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 59,872 psi | 90% | 2959 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,376 psi | 56% | 1844 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,000 psi | 85% | 2854 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 59,727 psi | 90% | 2887 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 57,363 psi | 86% | 2854 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 59,944 psi | 90% | 2913 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 92% | 58,711 psi | 88% | 2982 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 48,428 psi | 73% | 2838 fps | 98.9% |
| Lovex S065 | <<locked>> | 82% | 56,855 psi | 85% | 2828 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 59,059 psi | 89% | 2884 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 57,972 psi | 87% | 2861 fps | 100% |
| Norma 204 | <<locked>> | 84% | 58,349 psi | 87% | 2913 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 49,327 psi | 74% | 2867 fps | 100% |
| Norma MRP | <<locked>> | 88% | 56,768 psi | 85% | 2953 fps | 100% |
| Norma URP | <<locked>> | 84% | 59,088 psi | 89% | 2900 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 60,205 psi | 90% | 3009 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 84% | 58,189 psi | 87% | 2910 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 58,581 psi | 88% | 2933 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,392 psi | 58% | 1890 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 57,276 psi | 86% | 2887 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 60,249 psi | 90% | 2969 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 58,798 psi | 88% | 3045 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 58,146 psi | 87% | 3005 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 88% | 58,885 psi | 88% | 2904 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 88% | 57,479 psi | 86% | 2913 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 58,349 psi | 87% | 2864 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,855 psi | 85% | 2828 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 59,059 psi | 89% | 2884 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 59,814 psi | 90% | 2838 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 57,072 psi | 86% | 2910 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 56,521 psi | 85% | 2835 fps | 99.2% |
| Somchem S365 | <<locked>> | 84% | 56,637 psi | 85% | 2848 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 57,682 psi | 86% | 2881 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 56,884 psi | 85% | 2838 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 57,682 psi | 86% | 2864 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 56,478 psi | 85% | 2877 fps | 96.1% |
| Vihtavuori N550 | <<locked>> | 84% | 59,814 psi | 90% | 2890 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 60,278 psi | 90% | 2927 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 56,333 psi | 84% | 2953 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 94% | 56,884 psi | 85% | 2940 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 98% | 58,537 psi | 88% | 3009 fps | 99.1% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 59,886 psi | 90% | 3071 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,507 psi | 85% | 2789 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 58,697 psi | 88% | 2920 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 58,218 psi | 87% | 2982 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 57,740 psi | 87% | 2877 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% | 39,972 psi | 60% | 2566 fps | 99.4% |
| Accurate 4350 | <<locked>> | 80% | 53,171 psi | 80% | 2808 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 41,524 psi | 62% | 2684 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 44,295 psi | 66% | 2697 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 80% | 39,639 psi | 59% | 2635 fps | 96.3% |
| ADI AR 2217 | <<locked>> | 86% | 36,027 psi | 54% | 2546 fps | 95.3% |
| ADI AR 2218 | <<locked>> | 98% | 47,543 psi | 71% | 2867 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 84% | 30,516 psi | 46% | 2444 fps | 96% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,140 psi | 77% | 2815 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,309 psi | 66% | 2694 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,176 psi | 60% | 2638 fps | 97.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,769 psi | 58% | 2585 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,431 psi | 50% | 2513 fps | 98.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,816 psi | 66% | 2746 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 48,457 psi | 73% | 2858 fps | 95.8% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 47,268 psi | 71% | 2730 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 37,362 psi | 56% | 2575 fps | 96.7% |
| Bofors RP30 | <<locked>> | 84% | 35,621 psi | 53% | 2556 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 40,176 psi | 60% | 2638 fps | 97.7% |
| Bofors RP7 | <<locked>> | 80% | 54,752 psi | 82% | 2812 fps | 100% |
| Hodgdon H1000 | <<locked>> | 82% | 34,258 psi | 51% | 2503 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 54,824 psi | 82% | 2864 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 42,206 psi | 63% | 2638 fps | 96.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,481 psi | 62% | 2625 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,819 psi | 72% | 2690 fps | 100% |
| Hodgdon Retumbo | 65.7 gr | 80% | 32,605 psi | 49% | 2536 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 55,564 psi | 83% | 2897 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,992 psi | 42% | 1650 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,009 psi | 75% | 2746 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 56,115 psi | 84% | 2835 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 50,154 psi | 75% | 2749 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,468 psi | 65% | 2635 fps | 97% |
| IMR 7828 SSC | <<locked>> | 80% | 38,189 psi | 57% | 2608 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 92% | 36,521 psi | 55% | 2595 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 53,388 psi | 80% | 2779 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 52,025 psi | 78% | 2776 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 34,185 psi | 51% | 2438 fps | 98.1% |
| Norma 204 | <<locked>> | 80% | 50,749 psi | 76% | 2795 fps | 99.4% |
| Norma 217 | <<locked>> | 88% | 31,908 psi | 48% | 2497 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 42,525 psi | 64% | 2710 fps | 99.2% |
| Norma URP | <<locked>> | 80% | 51,837 psi | 78% | 2795 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 37,985 psi | 57% | 2615 fps | 96.2% |
| Ramshot Hunter | <<locked>> | 80% | 50,749 psi | 76% | 2799 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,040 psi | 51% | 2493 fps | 96.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,805 psi | 43% | 1693 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 53,447 psi | 80% | 2831 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 51,996 psi | 78% | 2854 fps | 100% |
| ReloadSwiss RS 76 | 70.3 gr | 80% | 31,720 psi | 48% | 2507 fps | 96.5% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 39,160 psi | 59% | 2664 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 45,208 psi | 68% | 2674 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 80% | 43,758 psi | 66% | 2680 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 80% | 54,752 psi | 82% | 2812 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,388 psi | 80% | 2779 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 52,025 psi | 78% | 2776 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,373 psi | 79% | 2733 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,424 psi | 65% | 2677 fps | 98.5% |
| Somchem S361 | <<locked>> | 80% | 46,122 psi | 69% | 2661 fps | 97.5% |
| Somchem S365 | <<locked>> | 80% | 49,240 psi | 74% | 2743 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,150 psi | 66% | 2657 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 80% | 53,301 psi | 80% | 2785 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,464 psi | 58% | 2536 fps | 97.8% |
| Vihtavuori N170 | <<locked>> | 94% | 52,750 psi | 79% | 2815 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 52,489 psi | 79% | 2789 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,207 psi | 65% | 2664 fps | 100% |
| Vihtavuori N560 | 68.2 gr | 80% | 42,366 psi | 64% | 2700 fps | 96.6% |
| Vihtavuori N565 | <<locked>> | 82% | 37,333 psi | 56% | 2572 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 90% | 43,555 psi | 65% | 2746 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 94% | 47,761 psi | 72% | 2861 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,576 psi | 79% | 2736 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 54,824 psi | 82% | 2864 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,318 psi | 54% | 2628 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,625 psi | 61% | 2585 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 78 powders for 7 mm STW loaded with the .284 | 160gr | Peregrine VRG-3. Vihtavuori N570 delivers the highest muzzle velocity at 3,071 fps; across all powders the maximum-charge window runs from 1,844 fps to 3,071 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 160.0 gr projectile in 0.284" calls for a 1:11.0 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, Vihtavuori N560 rank at the top here: for 7 mm STW with the .284 | 160gr | Peregrine VRG-3 they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 8700, Alliant Reloder-50, IMR 7977 Enduron 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.