Load Specifications
Load data in caliber 7 mm STW with .283 | 140gr | Frontier PH HPBT 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% | 59,727 psi | 90% | 3045 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,666 psi | 85% | 3025 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 58,552 psi | 88% | 3143 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 82% | 60,336 psi | 90% | 3031 fps | 100% |
| ADI AR 2209 | <<locked>> | 90% | 57,609 psi | 86% | 3084 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 94% | 59,640 psi | 89% | 3150 fps | 99.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,635 psi | 80% | 3041 fps | 98.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,341 psi | 72% | 3002 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 57,812 psi | 87% | 3077 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 57,580 psi | 86% | 3081 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 58,755 psi | 88% | 3091 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,145 psi | 86% | 3071 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 94% | 59,814 psi | 90% | 3143 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,290 psi | 86% | 3054 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,087 psi | 86% | 3117 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 58,175 psi | 87% | 3143 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 56,971 psi | 85% | 3038 fps | 96.5% |
| Bofors RP15 | <<locked>> | 96% | 58,668 psi | 88% | 3123 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 56,739 psi | 85% | 3114 fps | 99.3% |
| Bofors RP5 | <<locked>> | 94% | 59,814 psi | 90% | 3143 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 58,305 psi | 87% | 3025 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 59,393 psi | 89% | 3133 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 84% | 58,247 psi | 87% | 3077 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 56,782 psi | 85% | 3035 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 92% | 59,117 psi | 89% | 3084 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 57,943 psi | 87% | 3061 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,783 psi | 87% | 3002 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 59,915 psi | 90% | 3255 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 59,234 psi | 89% | 3114 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,275 psi | 56% | 1959 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 60,220 psi | 90% | 3061 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 84% | 59,785 psi | 90% | 3048 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 56,782 psi | 85% | 3012 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 59,683 psi | 89% | 3061 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 94% | 57,537 psi | 86% | 3127 fps | 99% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,627 psi | 65% | 2897 fps | 96.6% |
| Lovex S065 | <<locked>> | 84% | 56,985 psi | 85% | 2992 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 58,769 psi | 88% | 3038 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 57,058 psi | 86% | 3005 fps | 100% |
| Norma 204 | <<locked>> | 86% | 57,928 psi | 87% | 3064 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 44,106 psi | 66% | 2927 fps | 98.7% |
| Norma MRP | <<locked>> | 92% | 59,988 psi | 90% | 3163 fps | 100% |
| Norma URP | <<locked>> | 86% | 58,465 psi | 88% | 3058 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 58,639 psi | 88% | 3150 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 86% | 57,624 psi | 86% | 3064 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 57,203 psi | 86% | 3074 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,072 psi | 57% | 2001 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,666 psi | 85% | 3041 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 59,408 psi | 89% | 3130 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 57,087 psi | 86% | 3186 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 56,231 psi | 84% | 3133 fps | 98.2% |
| Rottweil R 903 | <<locked>> | 82% | 59,959 psi | 90% | 3022 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 58,407 psi | 88% | 3048 fps | 99% |
| Rottweil R 905 | <<locked>> | 90% | 56,637 psi | 85% | 3058 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 84% | 58,305 psi | 87% | 3025 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,985 psi | 85% | 2992 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 58,769 psi | 88% | 3038 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 59,045 psi | 89% | 2884 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 60,017 psi | 90% | 2995 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 60,060 psi | 90% | 3110 fps | 99.8% |
| Somchem S355 | <<locked>> | 82% | 59,379 psi | 89% | 3015 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 56,405 psi | 85% | 2979 fps | 98.3% |
| Somchem S365 | <<locked>> | 88% | 59,509 psi | 89% | 3058 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,261 psi | 86% | 3031 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 56,956 psi | 85% | 2930 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,623 psi | 85% | 2999 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 56,869 psi | 85% | 3009 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 86% | 59,524 psi | 89% | 3054 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 59,277 psi | 89% | 3081 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 59,553 psi | 89% | 3159 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 98% | 59,872 psi | 90% | 3140 fps | 99.1% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 56,898 psi | 85% | 3136 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 60,176 psi | 90% | 2999 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 58,247 psi | 87% | 3077 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 55,941 psi | 84% | 3133 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,203 psi | 86% | 3025 fps | 99.5% |
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% | 37,014 psi | 55% | 2641 fps | 97.8% |
| Accurate 4350 | <<locked>> | 80% | 49,313 psi | 74% | 2907 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 47,239 psi | 71% | 2943 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 56,666 psi | 85% | 2979 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 41,031 psi | 62% | 2776 fps | 96.4% |
| ADI AR 2213 | <<locked>> | 84% | 42,018 psi | 63% | 2825 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 92% | 40,843 psi | 61% | 2789 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 90% | 34,534 psi | 52% | 2680 fps | 96.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,408 psi | 62% | 2776 fps | 96.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,050 psi | 71% | 2913 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 54,752 psi | 82% | 3035 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,031 psi | 62% | 2769 fps | 96.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,898 psi | 55% | 2703 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,592 psi | 53% | 2671 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,922 psi | 46% | 2575 fps | 96.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,581 psi | 59% | 2818 fps | 99.5% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 53,519 psi | 80% | 2979 fps | 95.7% |
| Bofors RP15 | <<locked>> | 84% | 39,305 psi | 59% | 2762 fps | 95.9% |
| Bofors RP30 | <<locked>> | 90% | 40,219 psi | 60% | 2802 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 36,898 psi | 55% | 2703 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 51,329 psi | 77% | 2910 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 88% | 38,885 psi | 58% | 2746 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 80% | 50,778 psi | 76% | 2956 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 80% | 53,113 psi | 80% | 2972 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 84% | 44,962 psi | 67% | 2831 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 44,048 psi | 66% | 2815 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,411 psi | 67% | 2792 fps | 100% |
| Hodgdon Retumbo | 70.5 gr | 86% | 36,927 psi | 55% | 2785 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 51,039 psi | 77% | 2986 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,920 psi | 42% | 1755 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,818 psi | 70% | 2838 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,605 psi | 79% | 2936 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 46,746 psi | 70% | 2851 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 43,395 psi | 65% | 2769 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 84% | 40,596 psi | 61% | 2802 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 98% | 40,886 psi | 61% | 2835 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 50,299 psi | 75% | 2884 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 48,660 psi | 73% | 2871 fps | 99.4% |
| Lovex S071 | <<locked>> | 80% | 31,879 psi | 48% | 2516 fps | 95.9% |
| Norma 204 | <<locked>> | 80% | 47,065 psi | 71% | 2877 fps | 97.9% |
| Norma 217 | <<locked>> | 94% | 35,795 psi | 54% | 2733 fps | 96.1% |
| Norma MRP | <<locked>> | 80% | 38,769 psi | 58% | 2776 fps | 97.2% |
| Norma URP | <<locked>> | 80% | 48,095 psi | 72% | 2894 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 40,451 psi | 61% | 2812 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 46,992 psi | 70% | 2887 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 84% | 36,245 psi | 54% | 2680 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,514 psi | 43% | 1795 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,356 psi | 74% | 2927 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,688 psi | 71% | 2946 fps | 100% |
| ReloadSwiss RS 76 | 73.7 gr | 84% | 33,837 psi | 51% | 2690 fps | 95.6% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 44,454 psi | 67% | 2917 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 56,188 psi | 84% | 2969 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 42,235 psi | 63% | 2756 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 80% | 40,393 psi | 61% | 2756 fps | 96.5% |
| Rottweil R 907 | <<locked>> | 80% | 51,329 psi | 77% | 2910 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,299 psi | 75% | 2884 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 48,660 psi | 73% | 2871 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 55,593 psi | 83% | 2838 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,298 psi | 74% | 2831 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,059 psi | 60% | 2749 fps | 96.3% |
| Somchem S355 | <<locked>> | 80% | 55,738 psi | 84% | 2963 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 43,149 psi | 65% | 2740 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 45,426 psi | 68% | 2848 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,973 psi | 61% | 2736 fps | 97.5% |
| Vihtavuori N150 | <<locked>> | 80% | 53,447 psi | 80% | 2884 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,516 psi | 74% | 2887 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,549 psi | 53% | 2605 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 48,878 psi | 73% | 2887 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,813 psi | 60% | 2749 fps | 99.7% |
| Vihtavuori N560 | <<locked>> | 84% | 44,962 psi | 67% | 2900 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 88% | 42,337 psi | 63% | 2825 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 94% | 45,730 psi | 69% | 2933 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,921 psi | 73% | 2838 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,010 psi | 76% | 2963 fps | 99.6% |
| Winchester StaBALL HD | 67.3 gr | 80% | 32,039 psi | 48% | 2690 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,536 psi | 56% | 2657 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 .283 | 140gr | Frontier PH HPBT. Hodgdon Retumbo delivers the highest muzzle velocity at 3,255 fps; across all powders the maximum-charge window runs from 1,959 fps to 3,255 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 140.0 gr projectile in 0.283" 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 .283 | 140gr | Frontier PH HPBT 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.