Load Specifications
Load data in caliber 7 mm STW with .284 | 145gr | Peregrine Glider GRM bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Norma MRP and Accurate MAGPRO.
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>> | 94% | 57,464 psi | 86% | 2972 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 58,479 psi | 88% | 3009 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 56,492 psi | 85% | 3071 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 82% | 59,045 psi | 89% | 2969 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 59,930 psi | 90% | 3074 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 94% | 57,638 psi | 86% | 3074 fps | 99.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 51,808 psi | 78% | 2972 fps | 98.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,369 psi | 70% | 2927 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 88% | 59,785 psi | 90% | 3068 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 56,956 psi | 85% | 3022 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 59,292 psi | 89% | 3061 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 57,638 psi | 86% | 3068 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 96% | 59,161 psi | 89% | 3038 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 58,784 psi | 88% | 3097 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 60,307 psi | 90% | 3130 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 59,103 psi | 89% | 3035 fps | 97.1% |
| Bofors RP15 | <<locked>> | 96% | 56,782 psi | 85% | 3054 fps | 99.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 54,665 psi | 82% | 3041 fps | 99.1% |
| Bofors RP5 | <<locked>> | 94% | 57,638 psi | 86% | 3068 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 56,739 psi | 85% | 2956 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 57,334 psi | 86% | 3061 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 84% | 56,550 psi | 85% | 3009 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 59,117 psi | 89% | 3025 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 92% | 57,363 psi | 86% | 3012 fps | 98.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 60,133 psi | 90% | 3054 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 60,002 psi | 90% | 2986 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 57,667 psi | 86% | 3179 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 57,537 psi | 86% | 3048 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,028 psi | 56% | 1913 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 58,784 psi | 88% | 2999 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 84% | 58,233 psi | 87% | 2979 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 58,798 psi | 88% | 2999 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 58,218 psi | 87% | 2999 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 96% | 59,567 psi | 89% | 3114 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 41,771 psi | 63% | 2822 fps | 96.2% |
| Lovex S065 | <<locked>> | 86% | 58,871 psi | 88% | 2976 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 57,261 psi | 86% | 2972 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 58,726 psi | 88% | 2989 fps | 100% |
| Norma 204 | <<locked>> | 86% | 56,217 psi | 84% | 2995 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 41,989 psi | 63% | 2848 fps | 98.4% |
| Norma MRP | <<locked>> | 92% | 57,798 psi | 87% | 3091 fps | 100% |
| Norma URP | <<locked>> | 86% | 56,898 psi | 85% | 2992 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 56,492 psi | 85% | 3074 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 88% | 59,901 psi | 90% | 3054 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 59,538 psi | 89% | 3068 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,811 psi | 57% | 1955 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 58,972 psi | 88% | 3031 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 57,421 psi | 86% | 3061 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 59,190 psi | 89% | 3179 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 53,896 psi | 81% | 3058 fps | 98% |
| Rottweil R 903 | <<locked>> | 82% | 58,276 psi | 87% | 2956 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 56,956 psi | 85% | 2986 fps | 99% |
| Rottweil R 905 | <<locked>> | 92% | 58,711 psi | 88% | 3048 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 84% | 56,739 psi | 85% | 2956 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 58,871 psi | 88% | 2976 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 57,261 psi | 86% | 2972 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 60,176 psi | 90% | 3015 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,624 psi | 86% | 2822 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 58,363 psi | 87% | 2930 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 58,276 psi | 87% | 3045 fps | 99.7% |
| Somchem S355 | <<locked>> | 82% | 57,841 psi | 87% | 2949 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 58,653 psi | 88% | 2972 fps | 98.7% |
| Somchem S365 | <<locked>> | 88% | 57,624 psi | 86% | 2992 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 59,045 psi | 89% | 3015 fps | 100% |
| Vihtavuori N150 | <<locked>> | 84% | 59,132 psi | 89% | 2917 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 58,668 psi | 88% | 2982 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 58,914 psi | 88% | 2995 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 57,870 psi | 87% | 2986 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 57,145 psi | 86% | 3009 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 57,479 psi | 86% | 3087 fps | 98.8% |
| Vihtavuori N565 | <<locked>> | 98% | 57,551 psi | 86% | 3064 fps | 99% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 54,549 psi | 82% | 3061 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 58,610 psi | 88% | 2936 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 56,550 psi | 85% | 3009 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 58,015 psi | 87% | 3123 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 59,393 psi | 89% | 3015 fps | 99.7% |
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% | 35,244 psi | 53% | 2569 fps | 97.4% |
| Accurate 4350 | <<locked>> | 80% | 47,471 psi | 71% | 2838 fps | 100% |
| Accurate MAGPRO | 72.2 gr | 86% | 45,455 psi | 68% | 2871 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 55,303 psi | 83% | 2913 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 39,508 psi | 59% | 2707 fps | 96.1% |
| ADI AR 2213 | <<locked>> | 84% | 40,654 psi | 61% | 2756 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 92% | 39,291 psi | 59% | 2717 fps | 95% |
| ADI AR 2225 | <<locked>> | 90% | 32,982 psi | 49% | 2608 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,513 psi | 68% | 2844 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 53,113 psi | 80% | 2966 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,668 psi | 59% | 2703 fps | 96.3% |
| Alliant Reloder-22 | <<locked>> | 82% | 38,058 psi | 57% | 2700 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,997 psi | 51% | 2598 fps | 99.6% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,399 psi | 44% | 2497 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 37,666 psi | 56% | 2743 fps | 99.2% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 52,112 psi | 78% | 2913 fps | 95.5% |
| Bofors RP15 | <<locked>> | 84% | 37,739 psi | 57% | 2690 fps | 95.5% |
| Bofors RP30 | <<locked>> | 90% | 38,319 psi | 57% | 2726 fps | 95% |
| Bofors RP5 | <<locked>> | 82% | 38,058 psi | 57% | 2700 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 49,893 psi | 75% | 2844 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 88% | 37,463 psi | 56% | 2677 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 49,211 psi | 74% | 2890 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 51,808 psi | 78% | 2910 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 84% | 43,424 psi | 65% | 2766 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 84% | 42,670 psi | 64% | 2749 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,830 psi | 64% | 2723 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 35,375 psi | 53% | 2710 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 49,226 psi | 74% | 2913 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,717 psi | 42% | 1713 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,339 psi | 68% | 2772 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,343 psi | 77% | 2871 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 45,150 psi | 68% | 2782 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 42,047 psi | 63% | 2707 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 86% | 41,858 psi | 63% | 2795 fps | 95.7% |
| IMR 8133 Enduron | <<locked>> | 98% | 38,856 psi | 58% | 2753 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 48,762 psi | 73% | 2815 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 47,123 psi | 71% | 2805 fps | 99.3% |
| Lovex S071 | <<locked>> | 80% | 30,066 psi | 45% | 2434 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 45,571 psi | 68% | 2812 fps | 97.7% |
| Norma 217 | <<locked>> | 94% | 33,837 psi | 51% | 2654 fps | 95.5% |
| Norma MRP | 65.9 gr | 80% | 37,130 psi | 56% | 2703 fps | 96.9% |
| Norma URP | <<locked>> | 80% | 46,557 psi | 70% | 2825 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 41,785 psi | 63% | 2805 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 80% | 45,411 psi | 68% | 2818 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 84% | 34,490 psi | 52% | 2605 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,297 psi | 42% | 1755 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,645 psi | 71% | 2858 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,992 psi | 69% | 2877 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 32,198 psi | 48% | 2612 fps | 95% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 45,745 psi | 69% | 2910 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 54,462 psi | 82% | 2900 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 40,901 psi | 61% | 2690 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 80% | 38,899 psi | 58% | 2687 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 80% | 49,893 psi | 75% | 2844 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,762 psi | 73% | 2815 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 47,123 psi | 71% | 2805 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 56,086 psi | 84% | 2959 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 54,128 psi | 81% | 2776 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,703 psi | 72% | 2762 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,566 psi | 58% | 2680 fps | 96% |
| Somchem S355 | <<locked>> | 80% | 54,128 psi | 81% | 2897 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 44,672 psi | 67% | 2733 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 43,555 psi | 65% | 2776 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,465 psi | 59% | 2667 fps | 97.2% |
| Vihtavuori N150 | <<locked>> | 80% | 51,938 psi | 78% | 2818 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,051 psi | 72% | 2822 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 36,637 psi | 55% | 2595 fps | 96% |
| Vihtavuori N550 | <<locked>> | 80% | 47,442 psi | 71% | 2822 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 38,014 psi | 57% | 2677 fps | 99.6% |
| Vihtavuori N560 | 69.2 gr | 84% | 43,149 psi | 65% | 2825 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 90% | 43,381 psi | 65% | 2812 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 96% | 46,992 psi | 70% | 2927 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,398 psi | 71% | 2779 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,429 psi | 74% | 2894 fps | 99.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,168 psi | 45% | 2608 fps | 99.8% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,013 psi | 54% | 2585 fps | 95% |
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 80 powders for 7 mm STW loaded with the .284 | 145gr | Peregrine Glider GRM. Hodgdon Retumbo delivers the highest muzzle velocity at 3,179 fps; across all powders the maximum-charge window runs from 1,913 fps to 3,179 fps. ADI AR 2217 gives the best case fill at 100 %, and 80 of the 80 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 145.0 gr projectile in 0.284" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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. Vihtavuori N560, Norma MRP, Accurate MAGPRO rank at the top here: for 7 mm STW with the .284 | 145gr | Peregrine Glider GRM they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-33, IMR 7977 Enduron, Vihtavuori N170 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.