Load Specifications
Load data in caliber 7 mm STW with .284 | 160gr | Peregrine Glider GRM bullet and 75 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>> | 92% | 56,855 psi | 85% | 2844 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 57,711 psi | 87% | 2871 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 60,075 psi | 90% | 3009 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 90% | 58,784 psi | 88% | 2933 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 56,782 psi | 85% | 2943 fps | 99.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 54,897 psi | 82% | 2907 fps | 99.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,400 psi | 74% | 2871 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 86% | 59,001 psi | 88% | 2927 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 60,147 psi | 90% | 2933 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 58,247 psi | 87% | 2923 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,942 psi | 85% | 2936 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 58,465 psi | 88% | 2900 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 58,479 psi | 88% | 2969 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 59,480 psi | 89% | 2992 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 51,880 psi | 78% | 2920 fps | 96.5% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 58,030 psi | 87% | 2907 fps | 97.8% |
| Bofors RP15 | <<locked>> | 96% | 60,089 psi | 90% | 2979 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 58,233 psi | 87% | 2979 fps | 99.8% |
| Bofors RP5 | <<locked>> | 92% | 56,942 psi | 85% | 2936 fps | 99.9% |
| Bofors RP7 | <<locked>> | 84% | 59,379 psi | 89% | 2871 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 56,782 psi | 85% | 2936 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 84% | 59,451 psi | 89% | 2927 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 57,856 psi | 87% | 2884 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 90% | 56,318 psi | 84% | 2877 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 92% | 59,117 psi | 89% | 2920 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 58,914 psi | 88% | 2841 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 57,276 psi | 86% | 3048 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 56,231 psi | 84% | 2907 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,260 psi | 56% | 1824 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,885 psi | 87% | 2861 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 57,217 psi | 86% | 2841 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 58,015 psi | 87% | 2861 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 57,000 psi | 85% | 2861 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 94% | 58,885 psi | 88% | 2982 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 44,802 psi | 67% | 2776 fps | 98% |
| Lovex S065 | <<locked>> | 84% | 58,001 psi | 87% | 2838 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 59,901 psi | 90% | 2887 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 58,131 psi | 87% | 2861 fps | 100% |
| Norma 204 | <<locked>> | 86% | 59,190 psi | 89% | 2920 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 45,223 psi | 68% | 2799 fps | 99.6% |
| Norma MRP | <<locked>> | 90% | 56,971 psi | 85% | 2953 fps | 100% |
| Norma URP | <<locked>> | 86% | 59,785 psi | 90% | 2904 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 60,220 psi | 90% | 3005 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 86% | 58,798 psi | 88% | 2913 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 58,682 psi | 88% | 2936 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,101 psi | 57% | 1867 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,986 psi | 87% | 2894 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 56,565 psi | 85% | 2920 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 58,566 psi | 88% | 3045 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 57,667 psi | 86% | 3002 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 90% | 59,567 psi | 89% | 2904 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 90% | 57,899 psi | 87% | 2913 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 84% | 59,379 psi | 89% | 2871 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 58,001 psi | 87% | 2838 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 59,901 psi | 90% | 2887 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 60,162 psi | 90% | 2723 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,985 psi | 85% | 2792 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 57,464 psi | 86% | 2910 fps | 99.9% |
| Somchem S355 | <<locked>> | 82% | 60,234 psi | 90% | 2851 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 57,435 psi | 86% | 2841 fps | 99.1% |
| Somchem S365 | <<locked>> | 86% | 57,087 psi | 86% | 2854 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 58,305 psi | 87% | 2884 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 57,914 psi | 87% | 2776 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 57,754 psi | 87% | 2844 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 58,059 psi | 87% | 2864 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 56,884 psi | 85% | 2848 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 56,811 psi | 85% | 2877 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 56,623 psi | 85% | 2956 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 96% | 57,000 psi | 85% | 2940 fps | 99.4% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 58,465 psi | 88% | 3005 fps | 98.9% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 55,085 psi | 83% | 2995 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 57,305 psi | 86% | 2795 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 59,451 psi | 89% | 2927 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 57,827 psi | 87% | 2986 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 58,407 psi | 88% | 2881 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% | 37,492 psi | 56% | 2513 fps | 98.8% |
| Accurate 4350 | <<locked>> | 80% | 50,212 psi | 75% | 2759 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 41,698 psi | 63% | 2684 fps | 95.4% |
| ADI AR 2209 | <<locked>> | 80% | 41,756 psi | 63% | 2644 fps | 97.8% |
| ADI AR 2213 | <<locked>> | 80% | 37,202 psi | 56% | 2572 fps | 95% |
| ADI AR 2217 | <<locked>> | 88% | 36,172 psi | 54% | 2546 fps | 95% |
| ADI AR 2225 | <<locked>> | 86% | 30,589 psi | 46% | 2444 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 48,312 psi | 72% | 2769 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 56,072 psi | 84% | 2881 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,858 psi | 63% | 2641 fps | 97.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,550 psi | 56% | 2582 fps | 96.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,289 psi | 54% | 2539 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,256 psi | 47% | 2454 fps | 97.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,495 psi | 61% | 2687 fps | 99.9% |
| Alliant Reloder-33 | <<locked>> | 98% | 48,196 psi | 72% | 2854 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 47,979 psi | 72% | 2733 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 34,954 psi | 52% | 2516 fps | 95.5% |
| Bofors RP30 | <<locked>> | 86% | 35,520 psi | 53% | 2556 fps | 95.1% |
| Bofors RP5 | <<locked>> | 80% | 37,550 psi | 56% | 2582 fps | 96.7% |
| Bofors RP7 | <<locked>> | 80% | 52,127 psi | 78% | 2762 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 86% | 36,999 psi | 55% | 2569 fps | 96.1% |
| Hodgdon H414 | <<locked>> | 80% | 51,895 psi | 78% | 2815 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 54,128 psi | 81% | 2825 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 80% | 39,740 psi | 60% | 2582 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 39,015 psi | 58% | 2566 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,397 psi | 68% | 2651 fps | 100% |
| Hodgdon Retumbo | 63.9 gr | 82% | 32,779 psi | 49% | 2539 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 52,199 psi | 78% | 2844 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,920 psi | 42% | 1634 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,558 psi | 71% | 2697 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,563 psi | 80% | 2785 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 47,630 psi | 71% | 2707 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,278 psi | 62% | 2582 fps | 96% |
| IMR 7828 SSC | <<locked>> | 82% | 38,566 psi | 58% | 2615 fps | 95.7% |
| IMR 8133 Enduron | <<locked>> | 94% | 36,201 psi | 54% | 2589 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 50,995 psi | 76% | 2733 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,414 psi | 74% | 2730 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 32,082 psi | 48% | 2388 fps | 97.3% |
| Norma 204 | <<locked>> | 80% | 48,066 psi | 72% | 2743 fps | 98.9% |
| Norma 217 | <<locked>> | 90% | 31,676 psi | 47% | 2497 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 39,755 psi | 60% | 2651 fps | 98.6% |
| Norma URP | <<locked>> | 80% | 49,037 psi | 74% | 2746 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 38,232 psi | 57% | 2621 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 47,993 psi | 72% | 2749 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 31,633 psi | 47% | 2434 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,558 psi | 43% | 1673 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,285 psi | 75% | 2779 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,791 psi | 73% | 2805 fps | 100% |
| ReloadSwiss RS 76 | 68.4 gr | 82% | 31,923 psi | 48% | 2513 fps | 96.3% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 42,061 psi | 63% | 2730 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 42,989 psi | 64% | 2625 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 80% | 41,191 psi | 62% | 2628 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 80% | 52,127 psi | 78% | 2762 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,995 psi | 76% | 2733 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,414 psi | 74% | 2730 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 56,463 psi | 85% | 2680 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,951 psi | 75% | 2687 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,857 psi | 61% | 2621 fps | 97.7% |
| Somchem S355 | <<locked>> | 80% | 56,579 psi | 85% | 2802 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 43,772 psi | 66% | 2612 fps | 96.6% |
| Somchem S365 | <<locked>> | 80% | 46,267 psi | 69% | 2697 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,553 psi | 62% | 2605 fps | 98.5% |
| Vihtavuori N150 | <<locked>> | 80% | 54,346 psi | 81% | 2726 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 50,560 psi | 76% | 2743 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,201 psi | 54% | 2484 fps | 96.8% |
| Vihtavuori N550 | <<locked>> | 80% | 49,734 psi | 75% | 2743 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,596 psi | 61% | 2615 fps | 100% |
| Vihtavuori N560 | 64.7 gr | 80% | 39,755 psi | 60% | 2644 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 86% | 40,089 psi | 60% | 2635 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 92% | 43,526 psi | 65% | 2746 fps | 95.7% |
| Vihtavuori N570 | <<locked>> | 98% | 51,184 psi | 77% | 2930 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,879 psi | 75% | 2694 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 52,127 psi | 78% | 2818 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 33,127 psi | 50% | 2569 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,218 psi | 57% | 2536 fps | 96.9% |
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 81 powders for 7 mm STW loaded with the .284 | 160gr | Peregrine Glider GRM. Hodgdon Retumbo delivers the highest muzzle velocity at 3,048 fps; across all powders the maximum-charge window runs from 1,824 fps to 3,048 fps. ADI AR 2217 gives the best case fill at 100 %, and 81 of the 81 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 1:8.0 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 | Peregrine Glider GRM they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2218, 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.