Load Specifications
Load data in caliber 7 mm STW with .284 | 155gr | Frontier PH HPFB bullet and 74 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 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>> | 92% | 58,653 psi | 88% | 2904 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 59,538 psi | 89% | 2933 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 57,725 psi | 87% | 3005 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 90% | 60,205 psi | 90% | 2992 fps | 100% |
| ADI AR 2213 | <<locked>> | 92% | 58,392 psi | 88% | 3005 fps | 99.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 56,550 psi | 85% | 2969 fps | 99.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 51,053 psi | 77% | 2930 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 56,550 psi | 85% | 2933 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 84% | 56,521 psi | 85% | 2930 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 59,654 psi | 89% | 2982 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 58,668 psi | 88% | 2999 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 60,278 psi | 90% | 2959 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 60,350 psi | 90% | 3028 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 57,203 psi | 86% | 2995 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 53,925 psi | 81% | 2986 fps | 96.7% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 59,306 psi | 89% | 2963 fps | 97.9% |
| Bofors RP15 | <<locked>> | 94% | 57,812 psi | 87% | 2986 fps | 99.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 60,075 psi | 90% | 3038 fps | 99.9% |
| Bofors RP5 | <<locked>> | 92% | 58,668 psi | 88% | 2999 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 57,043 psi | 86% | 2877 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 58,421 psi | 88% | 2999 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 82% | 57,043 psi | 86% | 2930 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 59,219 psi | 89% | 2943 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 57,928 psi | 87% | 2940 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 90% | 56,710 psi | 85% | 2923 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 56,724 psi | 85% | 2854 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 59,088 psi | 89% | 3110 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 57,943 psi | 87% | 2966 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,376 psi | 56% | 1860 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 59,103 psi | 89% | 2917 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 58,320 psi | 87% | 2897 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 59,567 psi | 89% | 2917 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 58,262 psi | 87% | 2917 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 92% | 56,434 psi | 85% | 2982 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 46,673 psi | 70% | 2838 fps | 98.2% |
| Lovex S065 | <<locked>> | 84% | 59,292 psi | 89% | 2894 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 57,580 psi | 86% | 2890 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 60,205 psi | 90% | 2923 fps | 100% |
| Norma 204 | <<locked>> | 84% | 56,521 psi | 85% | 2917 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 47,210 psi | 71% | 2867 fps | 99.7% |
| Norma MRP | <<locked>> | 90% | 59,001 psi | 88% | 3022 fps | 100% |
| Norma URP | <<locked>> | 84% | 57,406 psi | 86% | 2910 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 57,740 psi | 87% | 3009 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 86% | 60,350 psi | 90% | 2972 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 56,246 psi | 84% | 2936 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,232 psi | 57% | 1903 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 59,741 psi | 90% | 2953 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 58,117 psi | 87% | 2979 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 56,028 psi | 84% | 3045 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 59,872 psi | 90% | 3068 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 88% | 57,348 psi | 86% | 2907 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 90% | 59,480 psi | 89% | 2976 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 57,043 psi | 86% | 2877 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 59,292 psi | 89% | 2894 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 57,580 psi | 86% | 2890 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 58,436 psi | 88% | 2848 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 59,045 psi | 89% | 2969 fps | 99.9% |
| Somchem S361 | <<locked>> | 88% | 58,871 psi | 88% | 2897 fps | 99.2% |
| Somchem S365 | <<locked>> | 86% | 58,711 psi | 88% | 2913 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 59,828 psi | 90% | 2940 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 59,480 psi | 89% | 2831 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 59,234 psi | 89% | 2904 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 59,654 psi | 89% | 2923 fps | 100% |
| Vihtavuori N170 | <<locked>> | 98% | 58,769 psi | 88% | 2936 fps | 96% |
| Vihtavuori N550 | <<locked>> | 84% | 58,334 psi | 87% | 2904 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 58,479 psi | 88% | 2936 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 58,523 psi | 88% | 3022 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 96% | 58,943 psi | 88% | 3002 fps | 99.5% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 60,365 psi | 90% | 3068 fps | 99% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 57,290 psi | 86% | 3064 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 58,682 psi | 88% | 2848 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 57,043 psi | 86% | 2930 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 60,060 psi | 90% | 3051 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 59,973 psi | 90% | 2940 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% | 39,160 psi | 59% | 2575 fps | 99% |
| Accurate 4350 | <<locked>> | 80% | 51,924 psi | 78% | 2822 fps | 100% |
| Accurate MAGPRO | 69.4 gr | 82% | 43,337 psi | 65% | 2749 fps | 95.7% |
| ADI AR 2209 | <<locked>> | 80% | 43,047 psi | 65% | 2703 fps | 97.9% |
| ADI AR 2213 | <<locked>> | 80% | 38,595 psi | 58% | 2635 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 88% | 37,608 psi | 56% | 2608 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 86% | 31,908 psi | 48% | 2510 fps | 96.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 43,555 psi | 65% | 2707 fps | 98% |
| Alliant Reloder-16 | <<locked>> | 80% | 49,516 psi | 74% | 2825 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,163 psi | 65% | 2700 fps | 98% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,102 psi | 59% | 2644 fps | 97% |
| Alliant Reloder-23 | <<locked>> | 80% | 37,797 psi | 57% | 2602 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,590 psi | 49% | 2520 fps | 98.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 42,337 psi | 63% | 2756 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 50,009 psi | 75% | 2920 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 49,153 psi | 74% | 2789 fps | 95.6% |
| Bofors RP15 | <<locked>> | 80% | 36,361 psi | 55% | 2579 fps | 95.8% |
| Bofors RP30 | <<locked>> | 86% | 37,217 psi | 56% | 2625 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 39,102 psi | 59% | 2644 fps | 97% |
| Bofors RP7 | <<locked>> | 80% | 53,490 psi | 80% | 2822 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 35,752 psi | 54% | 2566 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 53,200 psi | 80% | 2871 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 55,535 psi | 83% | 2887 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 80% | 41,133 psi | 62% | 2641 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 40,422 psi | 61% | 2625 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 46,644 psi | 70% | 2703 fps | 100% |
| Hodgdon Retumbo | 65.6 gr | 82% | 34,069 psi | 51% | 2602 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 53,722 psi | 81% | 2904 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,123 psi | 42% | 1667 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 48,762 psi | 73% | 2756 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 54,737 psi | 82% | 2841 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 49,124 psi | 74% | 2766 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,438 psi | 64% | 2638 fps | 96.2% |
| IMR 7828 SSC | <<locked>> | 82% | 39,972 psi | 60% | 2677 fps | 95.9% |
| IMR 8133 Enduron | <<locked>> | 94% | 37,942 psi | 57% | 2657 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 52,388 psi | 79% | 2792 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 50,865 psi | 76% | 2789 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 33,678 psi | 50% | 2454 fps | 97.6% |
| Norma 204 | <<locked>> | 80% | 49,516 psi | 74% | 2805 fps | 99% |
| Norma 217 | <<locked>> | 90% | 33,185 psi | 50% | 2562 fps | 96.1% |
| Norma MRP | <<locked>> | 80% | 41,147 psi | 62% | 2713 fps | 98.7% |
| Norma URP | <<locked>> | 80% | 50,488 psi | 76% | 2805 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 36,956 psi | 55% | 2618 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 49,458 psi | 74% | 2805 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 33,083 psi | 50% | 2500 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,790 psi | 43% | 1706 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 51,909 psi | 78% | 2841 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 50,256 psi | 75% | 2861 fps | 100% |
| ReloadSwiss RS 76 | 68.5 gr | 80% | 30,966 psi | 46% | 2510 fps | 95.4% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 40,741 psi | 61% | 2730 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 80% | 44,266 psi | 66% | 2684 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 80% | 42,598 psi | 64% | 2687 fps | 98% |
| Rottweil R 907 | <<locked>> | 80% | 53,490 psi | 80% | 2822 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,388 psi | 79% | 2792 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 50,865 psi | 76% | 2789 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 51,256 psi | 77% | 2743 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,250 psi | 63% | 2680 fps | 97.9% |
| Somchem S361 | <<locked>> | 80% | 45,049 psi | 68% | 2667 fps | 96.7% |
| Somchem S365 | <<locked>> | 80% | 47,819 psi | 72% | 2759 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,163 psi | 65% | 2667 fps | 98.7% |
| Vihtavuori N150 | <<locked>> | 80% | 55,724 psi | 84% | 2782 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 51,924 psi | 78% | 2799 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,521 psi | 56% | 2543 fps | 97.1% |
| Vihtavuori N170 | <<locked>> | 96% | 54,810 psi | 82% | 2874 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 51,300 psi | 77% | 2802 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,134 psi | 63% | 2677 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 41,060 psi | 62% | 2703 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 84% | 39,073 psi | 59% | 2641 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 92% | 45,179 psi | 68% | 2808 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 96% | 49,298 psi | 74% | 2927 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 51,140 psi | 77% | 2749 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 53,388 psi | 80% | 2874 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 34,896 psi | 52% | 2638 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,494 psi | 59% | 2592 fps | 97% |
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 74 powders for 7 mm STW loaded with the .284 | 155gr | Frontier PH HPFB. Hodgdon Retumbo delivers the highest muzzle velocity at 3,110 fps; across all powders the maximum-charge window runs from 1,860 fps to 3,110 fps. ADI AR 2217 gives the best case fill at 100 %, and 74 of the 74 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 155.0 gr projectile in 0.284" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, 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, Accurate MAGPRO rank at the top here: for 7 mm STW with the .284 | 155gr | Frontier PH HPFB 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.