Load Specifications
Load data in caliber 7 mm STW with .284 | 130gr | Speer Boat-Tail bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Hodgdon Retumbo 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% | 59,915 psi | 90% | 3136 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,463 psi | 85% | 3117 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 58,682 psi | 88% | 3235 fps | 98% |
| ADI AR 2208 | <<locked>> | 82% | 60,234 psi | 90% | 3130 fps | 100% |
| ADI AR 2209 | <<locked>> | 90% | 57,450 psi | 86% | 3173 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 94% | 59,480 psi | 89% | 3238 fps | 98.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,635 psi | 80% | 3127 fps | 98.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,269 psi | 72% | 3081 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 57,363 psi | 86% | 3176 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 58,624 psi | 88% | 3186 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 56,927 psi | 85% | 3156 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 59,654 psi | 89% | 3228 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,130 psi | 86% | 3143 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 56,956 psi | 85% | 3205 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 58,175 psi | 87% | 3235 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 56,985 psi | 85% | 3127 fps | 96.1% |
| Bofors RP15 | <<locked>> | 96% | 58,769 psi | 88% | 3215 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 56,927 psi | 85% | 3202 fps | 99% |
| Bofors RP5 | <<locked>> | 94% | 59,654 psi | 89% | 3228 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 58,204 psi | 87% | 3117 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 59,466 psi | 89% | 3225 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 84% | 58,073 psi | 87% | 3169 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 82% | 56,652 psi | 85% | 3127 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 92% | 59,074 psi | 89% | 3169 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 92% | 57,914 psi | 87% | 3150 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,725 psi | 87% | 3094 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 59,799 psi | 90% | 3346 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 59,190 psi | 89% | 3205 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,217 psi | 56% | 2041 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 60,220 psi | 90% | 3156 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 59,669 psi | 89% | 3143 fps | 99.9% |
| IMR 4831 | <<locked>> | 86% | 56,695 psi | 85% | 3107 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 59,596 psi | 89% | 3150 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 94% | 57,450 psi | 86% | 3215 fps | 98.7% |
| Lovex S065 | <<locked>> | 84% | 56,927 psi | 85% | 3084 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 58,740 psi | 88% | 3133 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 57,087 psi | 86% | 3097 fps | 100% |
| Norma 204 | <<locked>> | 86% | 57,827 psi | 87% | 3156 fps | 99.2% |
| Norma 217ᴾ | <<locked>> | 100% | 44,150 psi | 66% | 3002 fps | 98.3% |
| Norma MRP | <<locked>> | 92% | 60,002 psi | 90% | 3255 fps | 100% |
| Norma URP | <<locked>> | 86% | 58,421 psi | 88% | 3153 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 58,494 psi | 88% | 3235 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 57,479 psi | 86% | 3153 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 57,276 psi | 86% | 3163 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,971 psi | 57% | 2083 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,608 psi | 85% | 3136 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 59,321 psi | 89% | 3225 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 57,043 psi | 86% | 3271 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 56,521 psi | 85% | 3219 fps | 97.9% |
| Rottweil R 903 | <<locked>> | 82% | 59,712 psi | 90% | 3117 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 58,276 psi | 87% | 3136 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 90% | 56,666 psi | 85% | 3150 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 84% | 58,204 psi | 87% | 3117 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,927 psi | 85% | 3084 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 58,740 psi | 88% | 3133 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 58,900 psi | 88% | 2979 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 59,886 psi | 90% | 3087 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 59,959 psi | 90% | 3202 fps | 99.6% |
| Somchem S355 | <<locked>> | 82% | 59,248 psi | 89% | 3110 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 60,263 psi | 90% | 3127 fps | 98.5% |
| Somchem S365 | <<locked>> | 88% | 59,509 psi | 89% | 3153 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,188 psi | 86% | 3120 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 82% | 56,797 psi | 85% | 3025 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 60,220 psi | 90% | 3143 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,014 psi | 85% | 3097 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 86% | 59,480 psi | 89% | 3146 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 59,263 psi | 89% | 3173 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 59,553 psi | 89% | 3251 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 98% | 59,770 psi | 90% | 3225 fps | 98.8% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 56,971 psi | 85% | 3219 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 60,220 psi | 90% | 3091 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 58,305 psi | 87% | 3176 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,072 psi | 84% | 3228 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,116 psi | 86% | 3110 fps | 99.3% |
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% | 36,912 psi | 55% | 2717 fps | 97.2% |
| Accurate 4350 | <<locked>> | 80% | 49,153 psi | 74% | 2995 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 47,152 psi | 71% | 3022 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 56,536 psi | 85% | 3074 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 40,785 psi | 61% | 2851 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 86% | 44,933 psi | 67% | 2969 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 94% | 43,714 psi | 66% | 2930 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 90% | 34,505 psi | 52% | 2749 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,862 psi | 70% | 3002 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 54,549 psi | 82% | 3123 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,886 psi | 61% | 2848 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 82% | 39,523 psi | 59% | 2844 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,418 psi | 53% | 2746 fps | 99.5% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,705 psi | 46% | 2638 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,450 psi | 59% | 2890 fps | 99.1% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 53,490 psi | 80% | 3061 fps | 95.2% |
| Bofors RP15 | <<locked>> | 84% | 39,189 psi | 59% | 2838 fps | 95.2% |
| Bofors RP30 | <<locked>> | 92% | 42,946 psi | 64% | 2940 fps | 95.8% |
| Bofors RP5 | <<locked>> | 82% | 39,523 psi | 59% | 2844 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 51,155 psi | 77% | 2999 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 90% | 41,727 psi | 63% | 2890 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 50,749 psi | 76% | 3048 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 80% | 52,910 psi | 79% | 3061 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 84% | 44,875 psi | 67% | 2913 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 86% | 47,094 psi | 71% | 2959 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,280 psi | 66% | 2877 fps | 100% |
| Hodgdon Retumbo | 75.5 gr | 88% | 39,378 psi | 59% | 2927 fps | 96.2% |
| Hodgdon Superformance | <<locked>> | 80% | 50,923 psi | 76% | 3071 fps | 99.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,804 psi | 42% | 1827 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,557 psi | 70% | 2923 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,547 psi | 79% | 3025 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 46,673 psi | 70% | 2936 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 46,108 psi | 69% | 2910 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 86% | 43,265 psi | 65% | 2943 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 50,111 psi | 75% | 2972 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 48,602 psi | 73% | 2963 fps | 99.2% |
| Lovex S071 | <<locked>> | 80% | 31,720 psi | 48% | 2582 fps | 95.1% |
| Norma 204 | <<locked>> | 80% | 46,934 psi | 70% | 2963 fps | 97.4% |
| Norma 217 | <<locked>> | 94% | 35,650 psi | 53% | 2799 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 38,812 psi | 58% | 2854 fps | 96.7% |
| Norma URP | <<locked>> | 80% | 48,022 psi | 72% | 2982 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 43,395 psi | 65% | 2956 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 46,862 psi | 70% | 2972 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 84% | 36,129 psi | 54% | 2749 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,529 psi | 43% | 1873 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,356 psi | 74% | 3015 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,616 psi | 71% | 3035 fps | 99.9% |
| ReloadSwiss RS 76 | 79 gr | 86% | 36,332 psi | 54% | 2831 fps | 96.2% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 48,240 psi | 72% | 3068 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 80% | 56,173 psi | 84% | 3064 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 42,018 psi | 63% | 2835 fps | 95% |
| Rottweil R 905 | <<locked>> | 80% | 40,292 psi | 60% | 2835 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 51,155 psi | 77% | 2999 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,111 psi | 75% | 2972 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 48,602 psi | 73% | 2963 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 55,390 psi | 83% | 2933 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,052 psi | 74% | 2913 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,972 psi | 60% | 2828 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 55,521 psi | 83% | 3054 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 46,122 psi | 69% | 2881 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 45,136 psi | 68% | 2930 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,814 psi | 61% | 2815 fps | 96.9% |
| Vihtavuori N150 | <<locked>> | 80% | 53,388 psi | 80% | 2976 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,371 psi | 74% | 2972 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 37,971 psi | 57% | 2736 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 48,878 psi | 73% | 2976 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,740 psi | 60% | 2828 fps | 99.5% |
| Vihtavuori N560 | <<locked>> | 84% | 44,730 psi | 67% | 2976 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 90% | 45,295 psi | 68% | 2963 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 96% | 49,298 psi | 74% | 3084 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,820 psi | 73% | 2927 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,937 psi | 76% | 3051 fps | 99.4% |
| Winchester StaBALL HD | 70.5 gr | 80% | 31,879 psi | 48% | 2759 fps | 99.7% |
| Winchester Supreme 780 | <<locked>> | 82% | 40,190 psi | 60% | 2795 fps | 95.7% |
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 79 powders for 7 mm STW loaded with the .284 | 130gr | Speer Boat-Tail. Hodgdon Retumbo delivers the highest muzzle velocity at 3,346 fps; across all powders the maximum-charge window runs from 2,041 fps to 3,346 fps. ADI AR 2217 gives the best case fill at 100 %, and 79 of the 79 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 1:13.5 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. Winchester StaBALL HD, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for 7 mm STW with the .284 | 130gr | Speer Boat-Tail they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-33, IMR 7977 Enduron, Vihtavuori N170 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.