Load Specifications
Load data in caliber 7 mm STW with .284 | 140gr | Frontier BTSP 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, Accurate MAGPRO and Ramshot Grand.
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% | 58,769 psi | 88% | 3031 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 59,480 psi | 89% | 3064 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 57,421 psi | 86% | 3127 fps | 98.1% |
| ADI AR 2208 | <<locked>> | 82% | 59,509 psi | 89% | 3018 fps | 100% |
| ADI AR 2209 | <<locked>> | 90% | 56,666 psi | 85% | 3068 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 94% | 58,494 psi | 88% | 3130 fps | 99% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,649 psi | 79% | 3025 fps | 98.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 47,239 psi | 71% | 2979 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 56,898 psi | 85% | 3064 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 86% | 56,478 psi | 85% | 3068 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 57,885 psi | 87% | 3077 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 59,988 psi | 90% | 3114 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 58,610 psi | 88% | 3123 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 96% | 59,944 psi | 90% | 3091 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 59,901 psi | 90% | 3156 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 56,942 psi | 85% | 3127 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 59,828 psi | 90% | 3084 fps | 97% |
| Bofors RP15 | <<locked>> | 96% | 57,479 psi | 86% | 3107 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 55,608 psi | 83% | 3097 fps | 99.1% |
| Bofors RP5 | <<locked>> | 94% | 58,610 psi | 88% | 3123 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 57,537 psi | 86% | 3009 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 58,349 psi | 87% | 3117 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 84% | 57,261 psi | 86% | 3061 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 59,727 psi | 90% | 3077 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 92% | 58,276 psi | 87% | 3068 fps | 98.5% |
| Hodgdon H4831 SC | <<locked>> | 92% | 57,058 psi | 86% | 3048 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 56,956 psi | 85% | 2989 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 58,494 psi | 88% | 3235 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 58,262 psi | 87% | 3100 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,246 psi | 56% | 1952 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 59,538 psi | 89% | 3051 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 58,842 psi | 88% | 3031 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 59,785 psi | 90% | 3054 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 58,885 psi | 88% | 3048 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 94% | 56,362 psi | 84% | 3107 fps | 98.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 42,627 psi | 64% | 2874 fps | 96.2% |
| Lovex S065 | <<locked>> | 86% | 59,654 psi | 89% | 3028 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 58,044 psi | 87% | 3028 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 59,799 psi | 90% | 3045 fps | 100% |
| Norma 204 | <<locked>> | 86% | 57,014 psi | 85% | 3051 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 43,062 psi | 65% | 2904 fps | 98.5% |
| Norma MRP | <<locked>> | 92% | 58,740 psi | 88% | 3150 fps | 100% |
| Norma URP | <<locked>> | 86% | 57,667 psi | 86% | 3048 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 57,377 psi | 86% | 3130 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 86% | 56,666 psi | 85% | 3048 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 60,321 psi | 90% | 3120 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,043 psi | 57% | 1995 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 59,915 psi | 90% | 3087 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 58,407 psi | 88% | 3117 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 60,147 psi | 90% | 3235 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 54,969 psi | 82% | 3114 fps | 98% |
| Rottweil R 903 | <<locked>> | 82% | 59,074 psi | 89% | 3009 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 57,493 psi | 86% | 3035 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 92% | 59,495 psi | 89% | 3100 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 84% | 57,537 psi | 86% | 3009 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 59,654 psi | 89% | 3028 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 58,044 psi | 87% | 3028 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 58,436 psi | 88% | 2874 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 59,146 psi | 89% | 2986 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 59,059 psi | 89% | 3097 fps | 99.7% |
| Somchem S355 | <<locked>> | 82% | 58,523 psi | 88% | 3002 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 59,480 psi | 89% | 3025 fps | 98.6% |
| Somchem S365 | <<locked>> | 88% | 58,639 psi | 88% | 3048 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 60,118 psi | 90% | 3071 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 84% | 59,930 psi | 90% | 2969 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 59,350 psi | 89% | 3035 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 59,828 psi | 90% | 3048 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 58,552 psi | 88% | 3038 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 58,233 psi | 87% | 3068 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 58,378 psi | 88% | 3143 fps | 98.7% |
| Vihtavuori N565 | <<locked>> | 98% | 58,552 psi | 88% | 3120 fps | 98.9% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 55,579 psi | 83% | 3114 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 59,292 psi | 89% | 2986 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 57,450 psi | 86% | 3064 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 58,987 psi | 88% | 3179 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 60,278 psi | 90% | 3068 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% | 36,289 psi | 54% | 2625 fps | 97.5% |
| Accurate 4350 | <<locked>> | 80% | 48,428 psi | 73% | 2894 fps | 100% |
| Accurate MAGPRO | 73.4 gr | 86% | 46,383 psi | 70% | 2927 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 55,840 psi | 84% | 2969 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 40,306 psi | 60% | 2762 fps | 96.1% |
| ADI AR 2213 | <<locked>> | 84% | 41,365 psi | 62% | 2808 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 92% | 40,132 psi | 60% | 2772 fps | 95% |
| ADI AR 2225 | <<locked>> | 90% | 33,895 psi | 51% | 2664 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,683 psi | 61% | 2759 fps | 96.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,354 psi | 69% | 2904 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 53,853 psi | 81% | 3022 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,306 psi | 60% | 2753 fps | 96.2% |
| Alliant Reloder-22 | <<locked>> | 82% | 38,943 psi | 58% | 2756 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,824 psi | 52% | 2654 fps | 99.7% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,313 psi | 45% | 2556 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,638 psi | 58% | 2799 fps | 99.3% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 52,750 psi | 79% | 2963 fps | 95.4% |
| Bofors RP15 | <<locked>> | 84% | 38,609 psi | 58% | 2743 fps | 95.5% |
| Bofors RP30 | <<locked>> | 90% | 39,305 psi | 59% | 2785 fps | 95.1% |
| Bofors RP5 | <<locked>> | 82% | 38,943 psi | 58% | 2756 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 50,575 psi | 76% | 2894 fps | 99.2% |
| Hodgdon H1000 | <<locked>> | 90% | 41,017 psi | 61% | 2795 fps | 96.1% |
| Hodgdon H414 | <<locked>> | 80% | 50,009 psi | 75% | 2943 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 52,330 psi | 78% | 2959 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 84% | 44,135 psi | 66% | 2818 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 84% | 43,381 psi | 65% | 2799 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,598 psi | 65% | 2779 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 36,158 psi | 54% | 2766 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 50,111 psi | 75% | 2969 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,760 psi | 42% | 1745 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,122 psi | 69% | 2825 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,069 psi | 78% | 2923 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 45,977 psi | 69% | 2835 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 42,772 psi | 64% | 2756 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 86% | 42,540 psi | 64% | 2848 fps | 95.6% |
| IMR 8133 Enduron | <<locked>> | 98% | 39,929 psi | 60% | 2812 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 49,530 psi | 74% | 2867 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 47,892 psi | 72% | 2858 fps | 99.3% |
| Lovex S071 | <<locked>> | 80% | 31,198 psi | 47% | 2497 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 46,311 psi | 69% | 2861 fps | 97.6% |
| Norma 217 | <<locked>> | 94% | 34,882 psi | 52% | 2710 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 38,058 psi | 57% | 2759 fps | 97% |
| Norma URP | <<locked>> | 80% | 47,268 psi | 71% | 2881 fps | 100% |
| Ramshot Grand | 71.5 gr | 86% | 42,670 psi | 64% | 2861 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 80% | 46,209 psi | 69% | 2874 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 84% | 35,476 psi | 53% | 2661 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,529 psi | 43% | 1791 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,544 psi | 73% | 2913 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,702 psi | 70% | 2930 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 33,141 psi | 50% | 2671 fps | 95.1% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 46,934 psi | 70% | 2969 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 55,332 psi | 83% | 2956 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 41,539 psi | 62% | 2740 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 80% | 39,639 psi | 59% | 2740 fps | 96.1% |
| Rottweil R 907 | <<locked>> | 80% | 50,575 psi | 76% | 2894 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,530 psi | 74% | 2867 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 47,892 psi | 72% | 2858 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 54,766 psi | 82% | 2825 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,631 psi | 73% | 2815 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,305 psi | 59% | 2733 fps | 96% |
| Somchem S355 | <<locked>> | 80% | 54,897 psi | 82% | 2949 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 45,353 psi | 68% | 2785 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 44,585 psi | 67% | 2835 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,277 psi | 60% | 2720 fps | 97.2% |
| Vihtavuori N150 | <<locked>> | 80% | 52,620 psi | 79% | 2871 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,704 psi | 73% | 2871 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 37,362 psi | 56% | 2648 fps | 95.9% |
| Vihtavuori N550 | <<locked>> | 80% | 48,138 psi | 72% | 2874 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,189 psi | 59% | 2736 fps | 99.6% |
| Vihtavuori N560 | 70.4 gr | 84% | 44,048 psi | 66% | 2881 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 88% | 41,510 psi | 62% | 2805 fps | 95% |
| Vihtavuori N568 | <<locked>> | 96% | 47,950 psi | 72% | 2979 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,037 psi | 72% | 2828 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,227 psi | 75% | 2949 fps | 99.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 31,140 psi | 47% | 2671 fps | 99.8% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,898 psi | 55% | 2641 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 76 powders for 7 mm STW loaded with the .284 | 140gr | Frontier BTSP. Hodgdon Retumbo delivers the highest muzzle velocity at 3,235 fps; across all powders the maximum-charge window runs from 1,952 fps to 3,235 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 0.284" calls for a 1:9.0 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, Accurate MAGPRO, Ramshot Grand rank at the top here: for 7 mm STW with the .284 | 140gr | Frontier BTSP 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.