Load Specifications
Bullet Manufacturer:Hasler
Bullet Weight:127 gr
Bullet Diameter:0.284"
Bullet Length:<<locked>>
Caliber:7 mm WSM load data
Case Length (l3):2.09"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:81.1 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:10.5
Load data in caliber 7 mm WSM with .284 | 127gr | Hasler Hunting bullet and 102 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-17 and ReloadSwiss RS 60.
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 2495 | <<locked>> | 84% | 54,520 psi | 85% | 3025 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 56,753 psi | 89% | 3097 fps | 98.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,082 psi | 78% | 3061 fps | 98.5% |
| Accurate 4064 | <<locked>> | 86% | 54,868 psi | 86% | 3081 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 55,999 psi | 88% | 3189 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 82% | 54,636 psi | 86% | 3117 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 55,927 psi | 88% | 3123 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 57,624 psi | 90% | 3235 fps | 97.6% |
| ADI Benchmark 8208 | <<locked>> | 82% | 56,898 psi | 89% | 3117 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,288 psi | 87% | 3255 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 57,624 psi | 90% | 3228 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 56,521 psi | 89% | 3146 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 56,797 psi | 89% | 3169 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 57,101 psi | 89% | 3258 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 54,665 psi | 86% | 3222 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 56,768 psi | 89% | 3219 fps | 97.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,067 psi | 78% | 3143 fps | 96.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,079 psi | 74% | 3084 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,089 psi | 64% | 2979 fps | 97.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,462 psi | 85% | 3294 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,665 psi | 86% | 3130 fps | 99.9% |
| Bofors RP3 | <<locked>> | 88% | 57,290 psi | 90% | 3163 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,067 psi | 78% | 3143 fps | 96.3% |
| Bofors RP7 | <<locked>> | 92% | 56,826 psi | 89% | 3140 fps | 98.3% |
| Hodgdon BL-C2 | <<locked>> | 82% | 56,869 psi | 89% | 3146 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 54,302 psi | 85% | 3120 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 92% | 54,955 psi | 86% | 3186 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 90% | 54,940 psi | 86% | 3146 fps | 97.5% |
| Hodgdon H4895 | <<locked>> | 82% | 55,230 psi | 87% | 3127 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 57,363 psi | 90% | 3173 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 55,579 psi | 87% | 3166 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 55,274 psi | 87% | 3222 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,955 psi | 56% | 1969 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 56,565 psi | 89% | 3130 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 55,680 psi | 87% | 3107 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,317 psi | 87% | 3104 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 54,723 psi | 86% | 3081 fps | 98.4% |
| IMR 4350 | <<locked>> | 94% | 54,389 psi | 85% | 3114 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,259 psi | 87% | 3117 fps | 98.5% |
| IMR 4831 | <<locked>> | 96% | 56,724 psi | 89% | 3182 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 54,766 psi | 86% | 3146 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 57,043 psi | 89% | 3153 fps | 95.8% |
| IMR 8208 XBR | <<locked>> | 82% | 56,898 psi | 89% | 3117 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,824 psi | 86% | 3087 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 57,087 psi | 89% | 3094 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 55,245 psi | 87% | 3097 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 54,940 psi | 86% | 3107 fps | 99.3% |
| Lovex S070 | <<locked>> | 94% | 56,130 psi | 88% | 3150 fps | 98.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,220 psi | 65% | 2890 fps | 96.6% |
| Norma 201 | <<locked>> | 84% | 56,637 psi | 89% | 3110 fps | 100% |
| Norma 202 | <<locked>> | 84% | 57,479 psi | 90% | 3110 fps | 100% |
| Norma 203B | <<locked>> | 86% | 56,028 psi | 88% | 3153 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,114 psi | 86% | 3166 fps | 97% |
| Norma MRPᴾ | <<locked>> | 100% | 53,200 psi | 83% | 3238 fps | 98.4% |
| Norma URP | <<locked>> | 94% | 54,824 psi | 86% | 3173 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 86% | 57,130 psi | 90% | 3182 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 57,624 psi | 90% | 3235 fps | 99.4% |
| Ramshot TAC | <<locked>> | 82% | 57,087 psi | 89% | 3140 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 82% | 57,261 psi | 90% | 3159 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,434 psi | 57% | 2014 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,491 psi | 85% | 3104 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,012 psi | 85% | 3182 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,244 psi | 85% | 3222 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 56,260 psi | 88% | 3215 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,013 psi | 86% | 3245 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 82% | 57,174 psi | 90% | 3084 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 57,276 psi | 90% | 3110 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 57,435 psi | 90% | 3156 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 55,637 psi | 87% | 3140 fps | 96.1% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 55,883 psi | 88% | 3202 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 92% | 56,826 psi | 89% | 3140 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 92% | 54,940 psi | 86% | 3107 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,824 psi | 86% | 3087 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 55,245 psi | 87% | 3097 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 56,130 psi | 88% | 3150 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 55,550 psi | 87% | 3163 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 55,753 psi | 87% | 3117 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 56,753 psi | 89% | 3140 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,331 psi | 85% | 2992 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,172 psi | 86% | 2989 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 54,911 psi | 86% | 3058 fps | 98.5% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,390 psi | 87% | 3196 fps | 97.4% |
| Somchem S335 | <<locked>> | 84% | 57,305 psi | 90% | 3035 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,593 psi | 87% | 3107 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 57,334 psi | 90% | 3153 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 53,838 psi | 84% | 3176 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 56,405 psi | 88% | 3176 fps | 98.3% |
| Vihtavuori N133 | <<locked>> | 82% | 54,839 psi | 86% | 2976 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 57,522 psi | 90% | 3068 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 54,549 psi | 85% | 3031 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,361 psi | 87% | 3074 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 57,188 psi | 90% | 3173 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,704 psi | 76% | 3022 fps | 96.5% |
| Vihtavuori N530 | <<locked>> | 82% | 57,421 psi | 90% | 3117 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 56,478 psi | 89% | 3081 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 56,304 psi | 88% | 3176 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 52,808 psi | 83% | 3173 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 57,464 psi | 90% | 3140 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,201 psi | 87% | 3189 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,467 psi | 67% | 3127 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 56,840 psi | 89% | 3150 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,011 psi | 83% | 3104 fps | 96.7% |
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 2495 | <<locked>> | 80% | 47,805 psi | 75% | 2923 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,470 psi | 73% | 2913 fps | 96.1% |
| Accurate 3100 | <<locked>> | 92% | 37,710 psi | 59% | 2808 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 45,281 psi | 71% | 2923 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,098 psi | 53% | 2743 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 51,329 psi | 80% | 3061 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,540 psi | 68% | 2897 fps | 99% |
| ADI AR 2209 | <<locked>> | 94% | 47,166 psi | 74% | 3041 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 53,505 psi | 84% | 3064 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,790 psi | 75% | 3114 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 47,065 psi | 74% | 3038 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,685 psi | 68% | 2920 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,818 psi | 73% | 2992 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 33,721 psi | 53% | 2759 fps | 96% |
| Alliant Reloder-17 | 56.8 gr | 80% | 38,203 psi | 60% | 2900 fps | 99% |
| Alliant Reloder-19 | <<locked>> | 94% | 46,456 psi | 73% | 3025 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 98% | 46,891 psi | 73% | 3081 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 86% | 29,602 psi | 46% | 2654 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 96% | 36,027 psi | 56% | 2848 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 88% | 34,490 psi | 54% | 2854 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,140 psi | 80% | 3071 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 43,526 psi | 68% | 2923 fps | 99.8% |
| Bofors RP5 | <<locked>> | 98% | 46,891 psi | 73% | 3081 fps | 95.5% |
| Bofors RP7 | <<locked>> | 84% | 44,005 psi | 69% | 2900 fps | 95.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 53,185 psi | 83% | 3087 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,179 psi | 69% | 2930 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 84% | 41,684 psi | 65% | 2923 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 84% | 45,121 psi | 71% | 2956 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 51,880 psi | 81% | 3071 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,198 psi | 49% | 2648 fps | 96.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,472 psi | 76% | 3045 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 44,164 psi | 69% | 3009 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,687 psi | 42% | 1762 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,676 psi | 78% | 3018 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 52,098 psi | 82% | 3054 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,774 psi | 72% | 2933 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,153 psi | 75% | 2963 fps | 97.3% |
| IMR 4350 | <<locked>> | 86% | 42,018 psi | 66% | 2874 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 82% | 42,815 psi | 67% | 2874 fps | 95.8% |
| IMR 4831 | <<locked>> | 80% | 32,924 psi | 52% | 2697 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 48,022 psi | 75% | 3025 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 98% | 53,621 psi | 84% | 3094 fps | 95% |
| IMR 8208 XBR | <<locked>> | 80% | 53,505 psi | 84% | 3064 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 51,169 psi | 80% | 3031 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,502 psi | 79% | 2986 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 45,745 psi | 72% | 2933 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,594 psi | 59% | 2759 fps | 95.7% |
| Lovex S070 | <<locked>> | 84% | 40,698 psi | 64% | 2848 fps | 95.5% |
| Lovex S071 | <<locked>> | 98% | 38,537 psi | 60% | 2828 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 49,966 psi | 78% | 3002 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,705 psi | 79% | 3005 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,180 psi | 72% | 2979 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 47,935 psi | 75% | 3035 fps | 95.3% |
| Norma MRP | <<locked>> | 94% | 43,004 psi | 67% | 3031 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 34,287 psi | 54% | 2746 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 46,369 psi | 73% | 2999 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 38,174 psi | 60% | 2851 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 53,505 psi | 84% | 3081 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 53,606 psi | 84% | 3100 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,180 psi | 43% | 1804 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,396 psi | 70% | 2913 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,328 psi | 79% | 3117 fps | 99.8% |
| ReloadSwiss RS 60 | 56.8 gr | 80% | 40,669 psi | 64% | 2969 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,823 psi | 53% | 2756 fps | 95.4% |
| ReloadSwiss RS 70 | 59.1 gr | 82% | 35,810 psi | 56% | 2828 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 53,737 psi | 84% | 3031 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 47,427 psi | 74% | 2946 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,046 psi | 64% | 2867 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 96% | 52,228 psi | 82% | 3081 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 94% | 45,310 psi | 71% | 3005 fps | 95% |
| Rottweil R 907 | <<locked>> | 84% | 44,005 psi | 69% | 2900 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,594 psi | 59% | 2759 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,169 psi | 80% | 3031 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,745 psi | 72% | 2933 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 40,698 psi | 64% | 2848 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,293 psi | 66% | 2920 fps | 99.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,127 psi | 82% | 3054 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,734 psi | 78% | 3025 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,937 psi | 80% | 2940 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,830 psi | 67% | 2792 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 42,119 psi | 66% | 2818 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 48,240 psi | 76% | 3064 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 50,705 psi | 79% | 2936 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,996 psi | 81% | 3048 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,597 psi | 65% | 2867 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 30,748 psi | 48% | 2694 fps | 98% |
| Somchem S385 | <<locked>> | 92% | 43,178 psi | 68% | 2927 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 51,503 psi | 81% | 2923 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,543 psi | 75% | 2917 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,095 psi | 75% | 2930 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,711 psi | 62% | 2795 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 35,737 psi | 56% | 2749 fps | 96.4% |
| Vihtavuori N165 | <<locked>> | 98% | 45,339 psi | 71% | 2959 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 53,621 psi | 84% | 3058 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 46,282 psi | 73% | 2917 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,070 psi | 55% | 2743 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 86% | 32,663 psi | 51% | 2743 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,157 psi | 55% | 2723 fps | 98.4% |
| Winchester 760 | <<locked>> | 84% | 41,916 psi | 66% | 2930 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 88% | 27,978 psi | 44% | 2680 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,690 psi | 78% | 3031 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 46,064 psi | 72% | 2979 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 102 powders for 7 mm WSM loaded with the .284 | 127gr | Hasler Hunting. Alliant Reloder-26 delivers the highest muzzle velocity at 3,294 fps; across all powders the maximum-charge window runs from 1,969 fps to 3,294 fps. Accurate 3100 gives the best case fill at 100 %, and 102 of the 102 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 127.0 gr projectile in 0.284" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint 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-17, ReloadSwiss RS 60 rank at the top here: for 7 mm WSM with the .284 | 127gr | Hasler Hunting 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.