Load Specifications
Load data in caliber 7 mm STW with .284 | 153gr | 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 Hodgdon Retumbo, ReloadSwiss RS 76 and IMR 7828 SSC.
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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 59,234 psi | 89% | 2930 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 60,278 psi | 90% | 2963 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 58,421 psi | 88% | 3038 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 82% | 60,321 psi | 90% | 2917 fps | 100% |
| ADI AR 2209 | <<locked>> | 90% | 57,435 psi | 86% | 2972 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 94% | 59,408 psi | 89% | 3038 fps | 99.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,592 psi | 80% | 2940 fps | 99.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 47,848 psi | 72% | 2894 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 86% | 57,479 psi | 86% | 2966 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 58,755 psi | 88% | 2976 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 56,942 psi | 85% | 2956 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 94% | 59,451 psi | 89% | 3028 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 56,942 psi | 85% | 2936 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 56,710 psi | 85% | 3002 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 57,899 psi | 87% | 3028 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 56,768 psi | 85% | 2936 fps | 97.2% |
| Bofors RP15 | <<locked>> | 96% | 58,523 psi | 88% | 3015 fps | 99.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 56,434 psi | 85% | 3005 fps | 99.6% |
| Bofors RP5 | <<locked>> | 94% | 59,451 psi | 89% | 3028 fps | 99.9% |
| Bofors RP7 | <<locked>> | 84% | 58,117 psi | 87% | 2910 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 59,335 psi | 89% | 3028 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 84% | 57,986 psi | 87% | 2963 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 56,565 psi | 85% | 2920 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 92% | 58,987 psi | 88% | 2972 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 92% | 57,711 psi | 87% | 2953 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,682 psi | 86% | 2884 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 59,640 psi | 89% | 3140 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 59,001 psi | 88% | 3002 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,130 psi | 56% | 1864 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 60,336 psi | 90% | 2949 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 84% | 59,611 psi | 89% | 2933 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 56,536 psi | 85% | 2897 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 59,625 psi | 89% | 2953 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 94% | 57,261 psi | 86% | 3015 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,265 psi | 65% | 2795 fps | 97.2% |
| Lovex S065 | <<locked>> | 86% | 60,336 psi | 90% | 2927 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 58,508 psi | 88% | 2923 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 56,652 psi | 85% | 2897 fps | 100% |
| Norma 204 | <<locked>> | 86% | 57,885 psi | 87% | 2956 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 43,569 psi | 65% | 2818 fps | 99.1% |
| Norma MRP | <<locked>> | 92% | 59,698 psi | 89% | 3051 fps | 100% |
| Norma URP | <<locked>> | 86% | 58,305 psi | 87% | 2943 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 58,595 psi | 88% | 3038 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 86% | 57,522 psi | 86% | 2953 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 56,782 psi | 85% | 2963 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,942 psi | 57% | 1906 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,405 psi | 85% | 2927 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 59,437 psi | 89% | 3018 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 56,782 psi | 85% | 3077 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 55,840 psi | 84% | 3028 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 82% | 59,785 psi | 90% | 2904 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 58,320 psi | 87% | 2940 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 92% | 60,365 psi | 90% | 3005 fps | 100% |
| Rottweil R 907 | <<locked>> | 84% | 58,117 psi | 87% | 2910 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 86% | 60,336 psi | 90% | 2927 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 58,508 psi | 88% | 2923 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 59,074 psi | 89% | 2769 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 59,596 psi | 89% | 2884 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 59,930 psi | 90% | 2999 fps | 99.9% |
| Somchem S355 | <<locked>> | 82% | 59,219 psi | 89% | 2897 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 60,205 psi | 90% | 2930 fps | 99.2% |
| Somchem S365 | <<locked>> | 88% | 59,538 psi | 89% | 2943 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 56,927 psi | 85% | 2920 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 56,913 psi | 85% | 2818 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 60,292 psi | 90% | 2933 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 56,637 psi | 85% | 2900 fps | 99.9% |
| Vihtavuori N170ᴾ | <<locked>> | 100% | 59,538 psi | 89% | 2963 fps | 95.9% |
| Vihtavuori N550 | <<locked>> | 86% | 59,263 psi | 89% | 2936 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 59,103 psi | 89% | 2966 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 59,321 psi | 89% | 3051 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 98% | 59,292 psi | 89% | 3028 fps | 99.4% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 56,492 psi | 85% | 3028 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 60,162 psi | 90% | 2887 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 58,189 psi | 87% | 2966 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 60,176 psi | 90% | 3077 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 56,971 psi | 85% | 2913 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% | 36,419 psi | 55% | 2539 fps | 98.2% |
| Accurate 4350 | <<locked>> | 80% | 48,892 psi | 73% | 2795 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 43,555 psi | 65% | 2776 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 56,710 psi | 85% | 2867 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 40,654 psi | 61% | 2674 fps | 97.1% |
| ADI AR 2213 | <<locked>> | 82% | 38,870 psi | 58% | 2661 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 90% | 37,710 psi | 57% | 2625 fps | 95% |
| ADI AR 2225 | <<locked>> | 88% | 31,778 psi | 48% | 2520 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,065 psi | 71% | 2805 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 54,549 psi | 82% | 2917 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,814 psi | 61% | 2667 fps | 97.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,622 psi | 55% | 2608 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,186 psi | 53% | 2566 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,356 psi | 46% | 2474 fps | 96.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,233 psi | 59% | 2713 fps | 99.7% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 49,980 psi | 75% | 2818 fps | 95.5% |
| Bofors RP15 | <<locked>> | 82% | 36,492 psi | 55% | 2602 fps | 95.6% |
| Bofors RP30 | <<locked>> | 88% | 36,912 psi | 55% | 2638 fps | 95.1% |
| Bofors RP5 | <<locked>> | 80% | 36,622 psi | 55% | 2608 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 51,053 psi | 77% | 2799 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 86% | 35,926 psi | 54% | 2585 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 50,618 psi | 76% | 2848 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 80% | 53,127 psi | 80% | 2867 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 82% | 41,698 psi | 63% | 2671 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 82% | 40,799 psi | 61% | 2651 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,063 psi | 66% | 2680 fps | 100% |
| Hodgdon Retumbo | 66 gr | 84% | 34,142 psi | 51% | 2621 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 50,894 psi | 76% | 2877 fps | 99.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,876 psi | 42% | 1670 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,485 psi | 70% | 2733 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,489 psi | 79% | 2825 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 46,427 psi | 70% | 2740 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,321 psi | 60% | 2612 fps | 95.2% |
| IMR 7828 SSC | 65.9 gr | 84% | 40,277 psi | 60% | 2703 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 96% | 37,681 psi | 56% | 2671 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 49,922 psi | 75% | 2769 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,312 psi | 72% | 2762 fps | 99.7% |
| Lovex S071 | <<locked>> | 80% | 31,154 psi | 47% | 2411 fps | 96.4% |
| Norma 204 | <<locked>> | 80% | 46,876 psi | 70% | 2776 fps | 98.4% |
| Norma 217 | <<locked>> | 92% | 32,822 psi | 49% | 2569 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 38,522 psi | 58% | 2677 fps | 97.9% |
| Norma URP | <<locked>> | 80% | 47,834 psi | 72% | 2782 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 37,202 psi | 56% | 2641 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 46,775 psi | 70% | 2779 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 82% | 33,127 psi | 50% | 2516 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,500 psi | 43% | 1709 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,139 psi | 74% | 2815 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,558 psi | 71% | 2838 fps | 100% |
| ReloadSwiss RS 76 | 68.9 gr | 82% | 30,879 psi | 46% | 2520 fps | 95% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 43,932 psi | 66% | 2815 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 55,825 psi | 84% | 2851 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 41,974 psi | 63% | 2654 fps | 96.4% |
| Rottweil R 905 | <<locked>> | 80% | 40,089 psi | 60% | 2651 fps | 97.1% |
| Rottweil R 907 | <<locked>> | 80% | 51,053 psi | 77% | 2799 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,922 psi | 75% | 2769 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,312 psi | 72% | 2762 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 55,448 psi | 83% | 2723 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,878 psi | 73% | 2720 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,755 psi | 60% | 2648 fps | 97% |
| Somchem S355 | <<locked>> | 80% | 55,390 psi | 83% | 2844 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 42,844 psi | 64% | 2641 fps | 95.9% |
| Somchem S365 | <<locked>> | 80% | 44,962 psi | 67% | 2733 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,654 psi | 61% | 2635 fps | 98% |
| Vihtavuori N150 | <<locked>> | 80% | 53,185 psi | 80% | 2766 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,356 psi | 74% | 2776 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,201 psi | 53% | 2507 fps | 96% |
| Vihtavuori N170 | <<locked>> | 98% | 55,579 psi | 83% | 2904 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 48,544 psi | 73% | 2776 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,421 psi | 59% | 2644 fps | 99.9% |
| Vihtavuori N560 | <<locked>> | 82% | 41,437 psi | 62% | 2730 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 86% | 38,957 psi | 58% | 2657 fps | 95% |
| Vihtavuori N568 | <<locked>> | 94% | 45,266 psi | 68% | 2831 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,602 psi | 73% | 2730 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,807 psi | 76% | 2851 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 31,691 psi | 48% | 2589 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,159 psi | 56% | 2556 fps | 96% |
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 | 153gr | Peregrine Glider GRM. Hodgdon Retumbo delivers the highest muzzle velocity at 3,140 fps; across all powders the maximum-charge window runs from 1,864 fps to 3,140 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 153.0 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, IMR 7828 SSC rank at the top here: for 7 mm STW with the .284 | 153gr | 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.