Load Specifications
Load data in caliber 7 mm STW with .284 | 130gr | Sierra HPBT MatchKing bullet and 75 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% | 58,146 psi | 87% | 3110 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 59,190 psi | 89% | 3156 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 57,000 psi | 85% | 3205 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 82% | 59,045 psi | 89% | 3110 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 59,901 psi | 90% | 3209 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 94% | 58,030 psi | 87% | 3215 fps | 98.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,170 psi | 78% | 3097 fps | 98% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,876 psi | 70% | 3051 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 88% | 59,828 psi | 90% | 3212 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 57,319 psi | 86% | 3166 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 59,524 psi | 89% | 3199 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 94% | 58,146 psi | 87% | 3209 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 96% | 59,509 psi | 89% | 3179 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 59,248 psi | 89% | 3241 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 56,260 psi | 84% | 3209 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 59,524 psi | 89% | 3163 fps | 96.5% |
| Bofors RP15 | <<locked>> | 96% | 57,043 psi | 86% | 3189 fps | 99.2% |
| Bofors RP30ᴾ | <<locked>> | 100% | 55,013 psi | 82% | 3173 fps | 98.6% |
| Bofors RP5 | <<locked>> | 94% | 58,146 psi | 87% | 3209 fps | 99.4% |
| Bofors RP7 | <<locked>> | 84% | 57,087 psi | 86% | 3097 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 57,943 psi | 87% | 3199 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 84% | 56,724 psi | 85% | 3146 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 59,074 psi | 89% | 3163 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 92% | 57,682 psi | 86% | 3146 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,507 psi | 85% | 3127 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 60,017 psi | 90% | 3123 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 58,059 psi | 87% | 3317 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 84% | 57,667 psi | 86% | 3182 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,173 psi | 56% | 2031 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 58,972 psi | 88% | 3133 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 58,378 psi | 88% | 3120 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 59,132 psi | 89% | 3140 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 58,247 psi | 87% | 3127 fps | 98.2% |
| IMR 7828 SSC | <<locked>> | 96% | 60,017 psi | 90% | 3255 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 59,335 psi | 89% | 3117 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 57,667 psi | 86% | 3114 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 59,335 psi | 89% | 3130 fps | 100% |
| Norma 204 | <<locked>> | 86% | 56,550 psi | 85% | 3133 fps | 99% |
| Norma 217ᴾ | <<locked>> | 100% | 42,598 psi | 64% | 2972 fps | 97.8% |
| Norma MRP | <<locked>> | 92% | 58,204 psi | 87% | 3232 fps | 99.9% |
| Norma URP | <<locked>> | 86% | 57,188 psi | 86% | 3133 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 56,884 psi | 85% | 3209 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 60,046 psi | 90% | 3192 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 59,915 psi | 90% | 3202 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,927 psi | 57% | 2077 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 59,292 psi | 89% | 3173 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 57,682 psi | 86% | 3202 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 59,698 psi | 89% | 3314 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 54,433 psi | 82% | 3186 fps | 97.4% |
| Rottweil R 903 | <<locked>> | 82% | 58,653 psi | 88% | 3100 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 57,072 psi | 86% | 3117 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 92% | 59,088 psi | 89% | 3186 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 84% | 57,087 psi | 86% | 3097 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 59,335 psi | 89% | 3117 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 57,667 psi | 86% | 3114 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 60,205 psi | 90% | 3156 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,928 psi | 87% | 2966 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 58,668 psi | 88% | 3068 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 58,639 psi | 88% | 3182 fps | 99.4% |
| Somchem S355 | <<locked>> | 82% | 58,001 psi | 87% | 3091 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 59,059 psi | 89% | 3104 fps | 98.2% |
| Somchem S365 | <<locked>> | 88% | 57,986 psi | 87% | 3136 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 59,553 psi | 89% | 3153 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 59,422 psi | 89% | 3061 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 59,074 psi | 89% | 3127 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 59,306 psi | 89% | 3133 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 86% | 58,189 psi | 87% | 3127 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 57,827 psi | 87% | 3156 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 57,856 psi | 87% | 3225 fps | 98.3% |
| Vihtavuori N565 | <<locked>> | 98% | 58,146 psi | 87% | 3199 fps | 98.5% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 55,100 psi | 83% | 3189 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 58,813 psi | 88% | 3074 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 56,956 psi | 85% | 3150 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 96% | 58,262 psi | 87% | 3261 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 59,770 psi | 90% | 3150 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% | 35,882 psi | 54% | 2694 fps | 96.8% |
| Accurate 4350 | <<locked>> | 80% | 47,877 psi | 72% | 2976 fps | 99.9% |
| Accurate MAGPRO | 78.2 gr | 88% | 49,472 psi | 74% | 3071 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 55,506 psi | 83% | 3058 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 39,885 psi | 60% | 2831 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 86% | 43,816 psi | 66% | 2943 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 94% | 42,554 psi | 64% | 2900 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 92% | 35,839 psi | 54% | 2785 fps | 96% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,759 psi | 69% | 2982 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 53,258 psi | 80% | 3107 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,871 psi | 60% | 2825 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 84% | 41,147 psi | 62% | 2884 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,476 psi | 52% | 2723 fps | 99.3% |
| Alliant Reloder-25 | <<locked>> | 82% | 31,981 psi | 48% | 2677 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,276 psi | 57% | 2867 fps | 98.8% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 55,811 psi | 84% | 3100 fps | 95.6% |
| Bofors RP15 | <<locked>> | 86% | 40,944 psi | 61% | 2877 fps | 95.7% |
| Bofors RP30 | <<locked>> | 92% | 41,756 psi | 63% | 2917 fps | 95.3% |
| Bofors RP5 | <<locked>> | 84% | 41,147 psi | 62% | 2884 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 50,212 psi | 75% | 2979 fps | 98.9% |
| Hodgdon H1000 | <<locked>> | 90% | 40,538 psi | 61% | 2861 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 49,588 psi | 74% | 3025 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 80% | 51,967 psi | 78% | 3041 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 86% | 46,891 psi | 70% | 2953 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 86% | 45,934 psi | 69% | 2933 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,236 psi | 65% | 2858 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 38,319 psi | 57% | 2897 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 49,647 psi | 74% | 3048 fps | 99% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,731 psi | 42% | 1821 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,701 psi | 69% | 2904 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,488 psi | 77% | 3005 fps | 99.3% |
| IMR 4831 | <<locked>> | 80% | 45,469 psi | 68% | 2913 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 84% | 45,194 psi | 68% | 2887 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 88% | 45,179 psi | 68% | 2986 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 49,153 psi | 74% | 2953 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 47,514 psi | 71% | 2940 fps | 98.9% |
| Lovex S071 | <<locked>> | 82% | 32,982 psi | 49% | 2618 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 45,890 psi | 69% | 2940 fps | 97% |
| Norma 217 | <<locked>> | 96% | 36,999 psi | 55% | 2838 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 37,550 psi | 56% | 2828 fps | 96.1% |
| Norma URP | <<locked>> | 80% | 46,818 psi | 70% | 2959 fps | 99.9% |
| Ramshot Grand | 74.3 gr | 86% | 42,032 psi | 63% | 2927 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 45,774 psi | 69% | 2949 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 86% | 37,739 psi | 57% | 2792 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,456 psi | 43% | 1867 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,993 psi | 72% | 2992 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,282 psi | 69% | 3009 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 35,244 psi | 53% | 2802 fps | 95.5% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 46,499 psi | 70% | 3035 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 54,839 psi | 82% | 3045 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 43,888 psi | 66% | 2871 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 80% | 39,233 psi | 59% | 2808 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 50,212 psi | 75% | 2979 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,153 psi | 74% | 2953 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 47,514 psi | 71% | 2940 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 56,362 psi | 84% | 3100 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 54,375 psi | 82% | 2917 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,196 psi | 72% | 2897 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,899 psi | 58% | 2802 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 54,520 psi | 82% | 3041 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 45,078 psi | 68% | 2858 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 44,077 psi | 66% | 2913 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,958 psi | 60% | 2792 fps | 96.5% |
| Vihtavuori N150 | <<locked>> | 80% | 52,228 psi | 78% | 2956 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,211 psi | 72% | 2953 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 82% | 36,999 psi | 55% | 2713 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 47,761 psi | 72% | 2956 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 38,609 psi | 58% | 2808 fps | 99.3% |
| Vihtavuori N560 | 75 gr | 86% | 46,833 psi | 70% | 3022 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 90% | 43,947 psi | 66% | 2936 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 98% | 51,285 psi | 77% | 3120 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,601 psi | 71% | 2907 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,777 psi | 75% | 3028 fps | 99.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,748 psi | 46% | 2730 fps | 99.4% |
| Winchester Supreme 780 | <<locked>> | 82% | 39,218 psi | 59% | 2772 fps | 95.2% |
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 75 powders for 7 mm STW loaded with the .284 | 130gr | Sierra HPBT MatchKing. Hodgdon Retumbo delivers the highest muzzle velocity at 3,317 fps; across all powders the maximum-charge window runs from 2,031 fps to 3,317 fps. ADI AR 2217 gives the best case fill at 100 %, and 75 of the 75 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 130.0 gr projectile in 0.284" calls for a 1:11.5 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 | 130gr | Sierra HPBT MatchKing 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.