Load Specifications
Load data in caliber 7 mm WSM with .284 | 120gr | Barnes TSX BT bullet and 99 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-16 and Hodgdon Superformance.
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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 82% | 57,580 psi | 90% | 3123 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 57,305 psi | 90% | 3150 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 55,796 psi | 87% | 3159 fps | 97.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 48,820 psi | 77% | 3114 fps | 97.9% |
| Accurate 4064 | <<locked>> | 88% | 57,464 psi | 90% | 3205 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 54,853 psi | 86% | 3251 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 84% | 57,319 psi | 90% | 3245 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 54,868 psi | 86% | 3186 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 56,391 psi | 88% | 3291 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 82% | 55,956 psi | 88% | 3186 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 57,421 psi | 90% | 3153 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 53,853 psi | 84% | 3310 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 55,347 psi | 87% | 3212 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 55,637 psi | 87% | 3235 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 96% | 55,767 psi | 87% | 3317 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 92% | 57,435 psi | 90% | 3350 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 55,492 psi | 87% | 3274 fps | 96.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,977 psi | 72% | 3140 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,161 psi | 63% | 3025 fps | 96.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 52,997 psi | 83% | 3346 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 57,566 psi | 90% | 3261 fps | 99.9% |
| Bofors RP3 | <<locked>> | 88% | 56,202 psi | 88% | 3228 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 55,840 psi | 88% | 3202 fps | 97.8% |
| Hodgdon Benchmark | <<locked>> | 82% | 57,203 psi | 90% | 3163 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 55,941 psi | 88% | 3215 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 56,768 psi | 89% | 3241 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 94% | 57,653 psi | 90% | 3310 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 92% | 57,566 psi | 90% | 3268 fps | 97.5% |
| Hodgdon H4895 | <<locked>> | 82% | 54,302 psi | 85% | 3196 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 55,985 psi | 88% | 3232 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 54,288 psi | 85% | 3228 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 54,186 psi | 85% | 3281 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,868 psi | 56% | 2031 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 55,564 psi | 87% | 3202 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 54,694 psi | 86% | 3179 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 54,331 psi | 85% | 3169 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 86% | 57,305 psi | 90% | 3205 fps | 98.5% |
| IMR 4350 | <<locked>> | 96% | 56,869 psi | 89% | 3235 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 92% | 57,696 psi | 90% | 3235 fps | 98.5% |
| IMR 4831 | <<locked>> | 96% | 55,332 psi | 87% | 3241 fps | 99.8% |
| IMR 4895 | <<locked>> | 86% | 57,116 psi | 90% | 3268 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 55,956 psi | 88% | 3186 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 57,450 psi | 90% | 3212 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 56,202 psi | 88% | 3163 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 54,230 psi | 85% | 3163 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 57,580 psi | 90% | 3228 fps | 99.4% |
| Lovex S070 | <<locked>> | 94% | 55,274 psi | 87% | 3212 fps | 98.4% |
| Norma 201 | <<locked>> | 84% | 55,709 psi | 87% | 3179 fps | 100% |
| Norma 202 | <<locked>> | 84% | 56,492 psi | 89% | 3179 fps | 100% |
| Norma 203B | <<locked>> | 86% | 54,897 psi | 86% | 3219 fps | 100% |
| Norma 204 | <<locked>> | 94% | 54,027 psi | 85% | 3225 fps | 96.3% |
| Norma MRPᴾ | <<locked>> | 100% | 51,996 psi | 81% | 3294 fps | 97.7% |
| Norma URP | <<locked>> | 96% | 57,363 psi | 90% | 3294 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 86% | 55,941 psi | 88% | 3245 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 56,347 psi | 88% | 3294 fps | 99.1% |
| Ramshot TAC | <<locked>> | 82% | 56,202 psi | 88% | 3205 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 82% | 56,318 psi | 88% | 3225 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,289 psi | 57% | 2077 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 57,087 psi | 89% | 3228 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 56,855 psi | 89% | 3314 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 56,811 psi | 89% | 3346 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 54,940 psi | 86% | 3274 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 53,780 psi | 84% | 3301 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 82% | 56,130 psi | 88% | 3156 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 56,304 psi | 88% | 3179 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 56,072 psi | 88% | 3222 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 54,578 psi | 86% | 3258 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 92% | 55,840 psi | 88% | 3202 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 94% | 57,580 psi | 90% | 3228 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 84% | 57,450 psi | 90% | 3212 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 54,230 psi | 85% | 3163 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 55,274 psi | 87% | 3212 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 54,433 psi | 85% | 3228 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 54,824 psi | 86% | 3182 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 55,869 psi | 88% | 3212 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 56,840 psi | 89% | 3114 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 57,711 psi | 90% | 3110 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 57,580 psi | 90% | 3176 fps | 98.5% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 54,085 psi | 85% | 3251 fps | 96.7% |
| Somchem S335 | <<locked>> | 84% | 56,405 psi | 88% | 3107 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 54,665 psi | 86% | 3173 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 56,333 psi | 88% | 3219 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 56,507 psi | 89% | 3301 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 55,332 psi | 87% | 3232 fps | 97.8% |
| Vihtavuori N133 | <<locked>> | 84% | 57,276 psi | 90% | 3094 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 56,492 psi | 89% | 3140 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 57,217 psi | 90% | 3156 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 54,114 psi | 85% | 3136 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 56,159 psi | 88% | 3235 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 82% | 56,434 psi | 88% | 3186 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 55,332 psi | 87% | 3146 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 55,201 psi | 87% | 3235 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 51,503 psi | 81% | 3228 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 56,202 psi | 88% | 3202 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 56,985 psi | 89% | 3238 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 57,653 psi | 90% | 3310 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,466 psi | 65% | 3173 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 55,854 psi | 88% | 3215 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 51,996 psi | 81% | 3159 fps | 96% |
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 2015 | <<locked>> | 80% | 54,099 psi | 85% | 3071 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 46,731 psi | 73% | 2986 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 45,629 psi | 72% | 2966 fps | 95.3% |
| Accurate 3100 | <<locked>> | 94% | 39,465 psi | 62% | 2917 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 44,237 psi | 69% | 2982 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 35,679 psi | 56% | 2854 fps | 96% |
| ADI AR 2206H | <<locked>> | 80% | 50,270 psi | 79% | 3123 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 42,714 psi | 67% | 2953 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 96% | 49,429 psi | 77% | 3159 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 52,446 psi | 82% | 3130 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 53,766 psi | 84% | 3104 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 46,688 psi | 73% | 3173 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,714 psi | 67% | 2976 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,774 psi | 72% | 3051 fps | 99.1% |
| Alliant Reloder-16 | 53.9 gr | 80% | 33,112 psi | 52% | 2805 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,318 psi | 58% | 2949 fps | 98.4% |
| Alliant Reloder-19 | <<locked>> | 96% | 48,762 psi | 76% | 3146 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 88% | 30,937 psi | 48% | 2762 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 98% | 37,724 psi | 59% | 2959 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 90% | 36,347 psi | 57% | 2969 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,082 psi | 78% | 3130 fps | 99.4% |
| Bofors RP3 | <<locked>> | 80% | 42,685 psi | 67% | 2982 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 45,977 psi | 72% | 3012 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 53,896 psi | 84% | 3114 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 52,098 psi | 82% | 3153 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 43,308 psi | 68% | 2986 fps | 97.7% |
| Hodgdon H414 | <<locked>> | 86% | 43,801 psi | 69% | 3045 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 86% | 47,224 psi | 74% | 3074 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 50,821 psi | 80% | 3136 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,443 psi | 48% | 2690 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 47,456 psi | 74% | 3107 fps | 99.9% |
| Hodgdon Superformance | 65.9 gr | 86% | 43,279 psi | 68% | 3058 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,600 psi | 42% | 1818 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,631 psi | 76% | 3077 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 51,010 psi | 80% | 3120 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,875 psi | 70% | 2992 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,181 psi | 74% | 3018 fps | 96.6% |
| IMR 4350 | <<locked>> | 88% | 43,947 psi | 69% | 2989 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 82% | 42,090 psi | 66% | 2930 fps | 95% |
| IMR 4831 | <<locked>> | 82% | 34,432 psi | 54% | 2805 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 46,978 psi | 74% | 3084 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 80% | 52,446 psi | 82% | 3130 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 50,140 psi | 79% | 3097 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,632 psi | 78% | 3048 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 44,817 psi | 70% | 2992 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 39,160 psi | 61% | 2867 fps | 95.7% |
| Lovex S070 | <<locked>> | 86% | 42,627 psi | 67% | 2963 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 48,994 psi | 77% | 3064 fps | 100% |
| Norma 202 | <<locked>> | 80% | 49,661 psi | 78% | 3068 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,150 psi | 71% | 3038 fps | 99.3% |
| Norma 204 | <<locked>> | 92% | 50,459 psi | 79% | 3159 fps | 95.4% |
| Norma MRP | <<locked>> | 96% | 45,005 psi | 71% | 3146 fps | 95.9% |
| Norma URP | <<locked>> | 82% | 35,868 psi | 56% | 2858 fps | 95.9% |
| Ramshot Big Game | <<locked>> | 80% | 45,368 psi | 71% | 3054 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 40,030 psi | 63% | 2966 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 52,489 psi | 82% | 3140 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 52,547 psi | 82% | 3163 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,050 psi | 42% | 1860 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,555 psi | 68% | 2969 fps | 96.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,255 psi | 77% | 3179 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 39,740 psi | 62% | 3025 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 35,563 psi | 56% | 2867 fps | 95.5% |
| ReloadSwiss RS 70 | 61.8 gr | 84% | 37,536 psi | 59% | 2943 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 52,794 psi | 83% | 3104 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 46,528 psi | 73% | 3009 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 40,074 psi | 63% | 2917 fps | 99% |
| Rottweil R 905 | <<locked>> | 96% | 47,442 psi | 74% | 3123 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 86% | 45,977 psi | 72% | 3012 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 82% | 39,160 psi | 61% | 2867 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,140 psi | 79% | 3097 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,817 psi | 70% | 2992 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 42,627 psi | 67% | 2963 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,408 psi | 65% | 2976 fps | 98.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,053 psi | 80% | 3114 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,834 psi | 77% | 3087 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,125 psi | 79% | 3005 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,076 psi | 66% | 2854 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 41,292 psi | 65% | 2871 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 50,386 psi | 79% | 3182 fps | 95.9% |
| Somchem S335 | <<locked>> | 80% | 49,806 psi | 78% | 3002 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 50,937 psi | 80% | 3107 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 40,669 psi | 64% | 2923 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 29,892 psi | 47% | 2733 fps | 97.1% |
| Somchem S385 | <<locked>> | 94% | 45,136 psi | 71% | 3038 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 50,647 psi | 79% | 2995 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 46,601 psi | 73% | 2982 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,108 psi | 74% | 2995 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,827 psi | 61% | 2851 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 34,809 psi | 55% | 2795 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 52,779 psi | 83% | 3127 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 45,498 psi | 71% | 2979 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 34,330 psi | 54% | 2792 fps | 95% |
| Vihtavuori N555 | <<locked>> | 86% | 31,734 psi | 50% | 2782 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,389 psi | 54% | 2769 fps | 97.7% |
| Winchester 748 | <<locked>> | 80% | 53,272 psi | 83% | 3176 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 43,990 psi | 69% | 3051 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 90% | 29,211 psi | 46% | 2782 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 48,689 psi | 76% | 3094 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 98% | 48,341 psi | 76% | 3094 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 116 powders for 7 mm WSM loaded with the .284 | 120gr | Barnes TSX BT. Alliant Reloder-17 delivers the highest muzzle velocity at 3,350 fps; across all powders the maximum-charge window runs from 2,031 fps to 3,350 fps. Accurate 3100 gives the best case fill at 100 %, and 116 of the 116 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 120.0 gr projectile in 0.284" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2209 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. ReloadSwiss RS 70, Alliant Reloder-16, Hodgdon Superformance rank at the top here: for 7 mm WSM with the .284 | 120gr | Barnes TSX BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Bofors RP15 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.