Load Specifications
Load data in caliber 7 mm STW with .284 | 145gr | Fox Classic Hunter 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, Winchester StaBALL HD and ReloadSwiss RS 76.
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% | 58,972 psi | 88% | 2992 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 59,712 psi | 90% | 3025 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 57,928 psi | 87% | 3094 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 82% | 59,959 psi | 90% | 2982 fps | 100% |
| ADI AR 2209 | <<locked>> | 90% | 57,188 psi | 86% | 3035 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 94% | 59,103 psi | 89% | 3097 fps | 99.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,098 psi | 80% | 2992 fps | 98.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 47,558 psi | 71% | 2949 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 57,392 psi | 86% | 3031 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 57,029 psi | 85% | 3028 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 58,189 psi | 87% | 3038 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 56,666 psi | 85% | 3022 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 59,146 psi | 89% | 3091 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 56,536 psi | 85% | 2999 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 56,507 psi | 85% | 3068 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 57,450 psi | 86% | 3091 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 60,321 psi | 90% | 3054 fps | 97.5% |
| Bofors RP15 | <<locked>> | 96% | 57,972 psi | 87% | 3071 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 56,086 psi | 84% | 3064 fps | 99.3% |
| Bofors RP5 | <<locked>> | 94% | 59,146 psi | 89% | 3091 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 57,841 psi | 87% | 2976 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 58,958 psi | 88% | 3087 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 84% | 57,653 psi | 86% | 3028 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 60,205 psi | 90% | 3045 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 92% | 58,769 psi | 88% | 3035 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 92% | 57,522 psi | 86% | 3018 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,159 psi | 86% | 2949 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 59,190 psi | 89% | 3202 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 58,813 psi | 88% | 3064 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,057 psi | 56% | 1919 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 59,988 psi | 90% | 3015 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 84% | 59,292 psi | 89% | 2999 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 60,133 psi | 90% | 3015 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 59,306 psi | 89% | 3015 fps | 99% |
| IMR 7828 SSC | <<locked>> | 94% | 56,985 psi | 85% | 3074 fps | 99.1% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,033 psi | 65% | 2844 fps | 96.7% |
| Lovex S065 | <<locked>> | 86% | 59,944 psi | 90% | 2992 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 58,320 psi | 87% | 2989 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 60,002 psi | 90% | 3009 fps | 100% |
| Norma 204 | <<locked>> | 86% | 57,464 psi | 86% | 3018 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 43,308 psi | 65% | 2871 fps | 98.8% |
| Norma MRP | <<locked>> | 92% | 59,306 psi | 89% | 3110 fps | 100% |
| Norma URP | <<locked>> | 86% | 58,044 psi | 87% | 3009 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 58,088 psi | 87% | 3097 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 86% | 57,058 psi | 86% | 3012 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 56,652 psi | 85% | 3028 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,029 psi | 57% | 1965 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 60,089 psi | 90% | 3048 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 59,045 psi | 89% | 3084 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 56,362 psi | 84% | 3133 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 55,506 psi | 83% | 3084 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 82% | 59,292 psi | 89% | 2969 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 57,928 psi | 87% | 2999 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 92% | 60,002 psi | 90% | 3068 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 84% | 57,841 psi | 87% | 2976 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 59,944 psi | 90% | 2992 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 58,320 psi | 87% | 2989 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 58,552 psi | 88% | 2835 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 59,393 psi | 89% | 2946 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 59,567 psi | 89% | 3064 fps | 99.8% |
| Somchem S355 | <<locked>> | 82% | 58,784 psi | 88% | 2963 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 59,901 psi | 90% | 2992 fps | 98.9% |
| Somchem S365 | <<locked>> | 88% | 59,117 psi | 89% | 3009 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 56,376 psi | 85% | 2976 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 84% | 60,220 psi | 90% | 2933 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 59,770 psi | 90% | 2999 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 60,292 psi | 90% | 3015 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 58,914 psi | 88% | 3002 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 58,494 psi | 88% | 3028 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 58,943 psi | 88% | 3110 fps | 99% |
| Vihtavuori N565 | <<locked>> | 98% | 58,929 psi | 88% | 3084 fps | 99.2% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 56,130 psi | 84% | 3084 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 59,756 psi | 90% | 2953 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 57,899 psi | 87% | 3031 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 59,814 psi | 90% | 3140 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 56,724 psi | 85% | 2976 fps | 99.6% |
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% | 36,042 psi | 54% | 2585 fps | 97.7% |
| Accurate 4350 | <<locked>> | 80% | 48,457 psi | 73% | 2854 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 46,630 psi | 70% | 2894 fps | 96% |
| ADI AR 2208 | <<locked>> | 80% | 56,231 psi | 84% | 2930 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 40,509 psi | 61% | 2730 fps | 96.6% |
| ADI AR 2213 | <<locked>> | 84% | 41,568 psi | 62% | 2779 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 92% | 40,248 psi | 60% | 2740 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 90% | 33,823 psi | 51% | 2628 fps | 96.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,843 psi | 61% | 2726 fps | 96.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,528 psi | 70% | 2861 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 54,346 psi | 81% | 2986 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,451 psi | 61% | 2720 fps | 96.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,245 psi | 54% | 2654 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,882 psi | 52% | 2618 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,211 psi | 45% | 2520 fps | 96.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,740 psi | 58% | 2759 fps | 99.4% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 49,792 psi | 75% | 2874 fps | 95% |
| Bofors RP15 | <<locked>> | 84% | 38,725 psi | 58% | 2710 fps | 95.9% |
| Bofors RP30 | <<locked>> | 90% | 39,465 psi | 59% | 2749 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 36,245 psi | 54% | 2654 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 50,763 psi | 76% | 2861 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 88% | 38,247 psi | 57% | 2697 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 50,299 psi | 75% | 2910 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 80% | 52,692 psi | 79% | 2927 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 84% | 44,353 psi | 66% | 2785 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 84% | 43,598 psi | 65% | 2769 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,758 psi | 66% | 2740 fps | 100% |
| Hodgdon Retumbo | 69.6 gr | 86% | 36,216 psi | 54% | 2733 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 50,488 psi | 76% | 2936 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,746 psi | 42% | 1719 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,340 psi | 69% | 2792 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,170 psi | 78% | 2887 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 46,050 psi | 69% | 2799 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 42,931 psi | 64% | 2723 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 84% | 39,914 psi | 60% | 2749 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 98% | 40,059 psi | 60% | 2782 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 49,632 psi | 74% | 2831 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 47,979 psi | 72% | 2822 fps | 99.5% |
| Lovex S071 | <<locked>> | 80% | 30,850 psi | 46% | 2454 fps | 95.8% |
| Norma 204 | <<locked>> | 80% | 46,586 psi | 70% | 2831 fps | 98% |
| Norma 217 | <<locked>> | 94% | 34,853 psi | 52% | 2677 fps | 96% |
| Norma MRP | <<locked>> | 80% | 38,159 psi | 57% | 2723 fps | 97.3% |
| Norma URP | <<locked>> | 80% | 47,471 psi | 71% | 2841 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 39,769 psi | 60% | 2759 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 46,441 psi | 70% | 2838 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 84% | 35,476 psi | 53% | 2628 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,340 psi | 42% | 1759 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,718 psi | 73% | 2877 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,079 psi | 71% | 2897 fps | 100% |
| ReloadSwiss RS 76 | 72.8 gr | 84% | 33,069 psi | 50% | 2638 fps | 95.6% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 43,700 psi | 66% | 2864 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 55,463 psi | 83% | 2917 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 41,684 psi | 62% | 2707 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 80% | 39,726 psi | 60% | 2703 fps | 96.5% |
| Rottweil R 907 | <<locked>> | 80% | 50,763 psi | 76% | 2861 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,632 psi | 74% | 2831 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 47,979 psi | 72% | 2822 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 55,071 psi | 83% | 2789 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,501 psi | 73% | 2779 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,407 psi | 59% | 2697 fps | 96.4% |
| Somchem S355 | <<locked>> | 80% | 55,085 psi | 83% | 2910 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 42,496 psi | 64% | 2690 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 44,773 psi | 67% | 2795 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,263 psi | 60% | 2684 fps | 97.5% |
| Vihtavuori N150 | <<locked>> | 80% | 52,837 psi | 79% | 2831 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,936 psi | 73% | 2835 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,896 psi | 52% | 2552 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 48,283 psi | 72% | 2838 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 38,943 psi | 58% | 2694 fps | 99.7% |
| Vihtavuori N560 | <<locked>> | 84% | 44,309 psi | 66% | 2851 fps | 96% |
| Vihtavuori N565 | <<locked>> | 88% | 41,568 psi | 62% | 2772 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 94% | 45,005 psi | 67% | 2884 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,356 psi | 72% | 2792 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,517 psi | 76% | 2910 fps | 99.7% |
| Winchester StaBALL HD | 66.5 gr | 80% | 31,343 psi | 47% | 2635 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,941 psi | 55% | 2608 fps | 95.4% |
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 76 powders for 7 mm STW loaded with the .284 | 145gr | Fox Classic Hunter. Hodgdon Retumbo delivers the highest muzzle velocity at 3,202 fps; across all powders the maximum-charge window runs from 1,919 fps to 3,202 fps. ADI AR 2217 gives the best case fill at 100 %, and 76 of the 76 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 1:10.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Bofors RP30 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, Winchester StaBALL HD, ReloadSwiss RS 76 rank at the top here: for 7 mm STW with the .284 | 145gr | Fox Classic Hunter 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.