Load Specifications
Bullet Manufacturer:TWENTY-NINE
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:1:10.0
Load data in caliber 7 mm WSM with .284 | 127gr | TWENTY-NINE ERTP bullet and 101 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.
A valid access license is required to use the Personalized Load Calculator.
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% | 55,477 psi | 87% | 3028 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 57,276 psi | 90% | 3097 fps | 98.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,575 psi | 79% | 3061 fps | 98.6% |
| Accurate 4064 | <<locked>> | 86% | 56,057 psi | 88% | 3091 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 56,550 psi | 89% | 3189 fps | 99.9% |
| Accurate High Countryᴾ | <<locked>> | 100% | 55,317 psi | 87% | 3268 fps | 96.3% |
| ADI AR 2206H | <<locked>> | 82% | 54,969 psi | 86% | 3114 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 56,202 psi | 88% | 3117 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,288 psi | 85% | 3169 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 82% | 57,159 psi | 90% | 3114 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,361 psi | 87% | 3248 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 57,696 psi | 90% | 3225 fps | 97.6% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 57,696 psi | 90% | 3225 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 56,971 psi | 89% | 3146 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 57,232 psi | 90% | 3169 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 57,232 psi | 90% | 3251 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 54,940 psi | 86% | 3222 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 56,826 psi | 89% | 3212 fps | 97.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,517 psi | 79% | 3146 fps | 96.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,572 psi | 75% | 3087 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,626 psi | 65% | 2986 fps | 97.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,824 psi | 86% | 3294 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,056 psi | 86% | 3130 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 54,157 psi | 85% | 3107 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,517 psi | 79% | 3146 fps | 96.4% |
| Bofors RP7 | <<locked>> | 92% | 57,392 psi | 90% | 3140 fps | 98.3% |
| Hodgdon BL-C2 | <<locked>> | 82% | 57,377 psi | 90% | 3146 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 54,607 psi | 86% | 3117 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 92% | 55,259 psi | 87% | 3186 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 90% | 55,158 psi | 86% | 3140 fps | 97.4% |
| Hodgdon H4895 | <<locked>> | 82% | 55,608 psi | 87% | 3127 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 57,682 psi | 90% | 3169 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 55,985 psi | 88% | 3166 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 55,666 psi | 87% | 3222 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,129 psi | 57% | 1965 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 56,840 psi | 89% | 3127 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,231 psi | 88% | 3107 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,680 psi | 87% | 3100 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 54,998 psi | 86% | 3077 fps | 98.4% |
| IMR 4350 | <<locked>> | 94% | 54,636 psi | 86% | 3110 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,637 psi | 87% | 3114 fps | 98.5% |
| IMR 4831 | <<locked>> | 96% | 57,130 psi | 90% | 3182 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,216 psi | 87% | 3146 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 57,159 psi | 90% | 3114 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 55,448 psi | 87% | 3091 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 57,319 psi | 90% | 3087 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 55,738 psi | 87% | 3094 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,550 psi | 87% | 3107 fps | 99.3% |
| Lovex S070 | <<locked>> | 94% | 56,826 psi | 89% | 3150 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,974 psi | 66% | 2894 fps | 96.7% |
| Norma 201 | <<locked>> | 84% | 57,159 psi | 90% | 3110 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,375 psi | 85% | 3054 fps | 100% |
| Norma 203B | <<locked>> | 86% | 56,521 psi | 89% | 3153 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,434 psi | 87% | 3166 fps | 97% |
| Norma MRPᴾ | <<locked>> | 100% | 53,447 psi | 84% | 3235 fps | 98.3% |
| Norma URP | <<locked>> | 94% | 55,405 psi | 87% | 3176 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 86% | 57,305 psi | 90% | 3176 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 54,172 psi | 85% | 3169 fps | 99% |
| Ramshot TAC | <<locked>> | 82% | 57,508 psi | 90% | 3136 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 82% | 57,667 psi | 90% | 3156 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,666 psi | 57% | 2011 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,737 psi | 86% | 3100 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,375 psi | 85% | 3179 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,447 psi | 85% | 3219 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 56,449 psi | 88% | 3212 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,129 psi | 86% | 3238 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 84% | 54,578 psi | 86% | 3058 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,259 psi | 85% | 3100 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 55,970 psi | 88% | 3136 fps | 96% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,014 psi | 88% | 3196 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 92% | 57,392 psi | 90% | 3140 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,550 psi | 87% | 3107 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,448 psi | 87% | 3091 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 55,738 psi | 87% | 3094 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 56,826 psi | 89% | 3150 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,043 psi | 88% | 3166 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 56,362 psi | 88% | 3117 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 57,145 psi | 90% | 3140 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,853 psi | 86% | 2992 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,448 psi | 87% | 2986 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,245 psi | 87% | 3054 fps | 98.5% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,506 psi | 87% | 3192 fps | 97.4% |
| Somchem S335 | <<locked>> | 84% | 57,696 psi | 90% | 3031 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,043 psi | 88% | 3104 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,418 psi | 85% | 3097 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 54,157 psi | 85% | 3176 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 56,942 psi | 89% | 3173 fps | 98.3% |
| Vihtavuori N133 | <<locked>> | 82% | 55,274 psi | 87% | 2972 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,592 psi | 86% | 3018 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,187 psi | 86% | 3035 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,637 psi | 87% | 3071 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 57,464 psi | 90% | 3166 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,907 psi | 77% | 3018 fps | 96.4% |
| Vihtavuori N540 | <<locked>> | 86% | 56,724 psi | 89% | 3077 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 56,652 psi | 89% | 3173 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,113 psi | 83% | 3173 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 57,522 psi | 90% | 3133 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,535 psi | 87% | 3189 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,902 psi | 67% | 3130 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 57,334 psi | 90% | 3150 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,476 psi | 84% | 3107 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% | 48,733 psi | 76% | 2927 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,949 psi | 74% | 2913 fps | 96.1% |
| Accurate 3100 | <<locked>> | 92% | 38,435 psi | 60% | 2818 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 46,108 psi | 72% | 2927 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,824 psi | 55% | 2753 fps | 96.1% |
| Accurate High Country | <<locked>> | 98% | 51,721 psi | 81% | 3202 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 51,677 psi | 81% | 3058 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,845 psi | 69% | 2894 fps | 99% |
| ADI AR 2209 | <<locked>> | 94% | 47,485 psi | 74% | 3038 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 53,780 psi | 84% | 3058 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,124 psi | 75% | 3117 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 47,398 psi | 74% | 3035 fps | 95.3% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 47,398 psi | 74% | 3035 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,121 psi | 69% | 2920 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,253 psi | 74% | 2995 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,272 psi | 54% | 2766 fps | 96.1% |
| Alliant Reloder-17 | 56 gr | 80% | 38,682 psi | 61% | 2904 fps | 99% |
| Alliant Reloder-19 | <<locked>> | 94% | 46,789 psi | 73% | 3028 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 98% | 47,123 psi | 74% | 3081 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 84% | 28,384 psi | 44% | 2605 fps | 95% |
| Alliant Reloder-25 | <<locked>> | 96% | 36,564 psi | 57% | 2854 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 88% | 35,099 psi | 55% | 2864 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,547 psi | 81% | 3071 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 44,396 psi | 70% | 2933 fps | 99.8% |
| Bofors RP5 | <<locked>> | 98% | 47,123 psi | 74% | 3081 fps | 95.4% |
| Bofors RP7 | <<locked>> | 84% | 44,498 psi | 70% | 2900 fps | 95.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 53,693 psi | 84% | 3087 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,918 psi | 70% | 2940 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 84% | 42,206 psi | 66% | 2930 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 84% | 45,527 psi | 71% | 2956 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 52,257 psi | 82% | 3071 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,850 psi | 50% | 2657 fps | 97% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,834 psi | 77% | 3045 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 44,585 psi | 70% | 3009 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,948 psi | 42% | 1759 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,922 psi | 78% | 3015 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 52,678 psi | 83% | 3054 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,064 psi | 72% | 2930 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,457 psi | 76% | 2959 fps | 97.2% |
| IMR 4350 | <<locked>> | 86% | 42,453 psi | 67% | 2874 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,756 psi | 64% | 2818 fps | 95% |
| IMR 4831 | <<locked>> | 80% | 33,533 psi | 53% | 2703 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 48,457 psi | 76% | 3025 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 80% | 53,780 psi | 84% | 3058 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 51,750 psi | 81% | 3031 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,749 psi | 80% | 2979 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 46,209 psi | 72% | 2933 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,130 psi | 60% | 2762 fps | 95.8% |
| Lovex S070 | <<locked>> | 84% | 41,481 psi | 65% | 2858 fps | 95.6% |
| Lovex S071 | <<locked>> | 96% | 36,898 psi | 58% | 2782 fps | 95% |
| Norma 201 | <<locked>> | 80% | 50,459 psi | 79% | 3002 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,039 psi | 80% | 3002 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,601 psi | 73% | 2982 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 48,211 psi | 76% | 3031 fps | 95.3% |
| Norma MRP | <<locked>> | 94% | 43,511 psi | 68% | 3035 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 34,795 psi | 55% | 2749 fps | 96% |
| Ramshot Big Game | <<locked>> | 80% | 46,833 psi | 73% | 2999 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 38,711 psi | 61% | 2854 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 53,896 psi | 84% | 3077 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 53,998 psi | 85% | 3097 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,311 psi | 43% | 1798 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,846 psi | 70% | 2917 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,691 psi | 79% | 3117 fps | 99.8% |
| ReloadSwiss RS 60 | 56 gr | 80% | 41,104 psi | 64% | 2972 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,621 psi | 54% | 2769 fps | 95.6% |
| ReloadSwiss RS 70 | 58.3 gr | 82% | 36,332 psi | 57% | 2835 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 48,196 psi | 76% | 2949 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,655 psi | 65% | 2867 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 96% | 52,504 psi | 82% | 3077 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 94% | 45,919 psi | 72% | 3012 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 84% | 44,498 psi | 70% | 2900 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,130 psi | 60% | 2762 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,750 psi | 81% | 3031 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,209 psi | 72% | 2933 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 41,481 psi | 65% | 2858 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,728 psi | 67% | 2923 fps | 99.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,663 psi | 83% | 3058 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,111 psi | 79% | 3022 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,459 psi | 81% | 2940 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,323 psi | 68% | 2792 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 40,030 psi | 63% | 2762 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 48,617 psi | 76% | 3064 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 51,111 psi | 80% | 2933 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,460 psi | 82% | 3048 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,090 psi | 66% | 2871 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 31,314 psi | 49% | 2700 fps | 98.2% |
| Somchem S385 | <<locked>> | 92% | 43,700 psi | 68% | 2930 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 51,924 psi | 81% | 2923 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,167 psi | 75% | 2920 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,428 psi | 76% | 2930 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,219 psi | 63% | 2799 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 36,187 psi | 57% | 2756 fps | 96.5% |
| Vihtavuori N165 | <<locked>> | 98% | 45,847 psi | 72% | 2959 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 46,978 psi | 74% | 2923 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,810 psi | 56% | 2753 fps | 96.1% |
| Vihtavuori N555 | <<locked>> | 84% | 31,198 psi | 49% | 2694 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,694 psi | 56% | 2726 fps | 98.5% |
| Winchester 760 | <<locked>> | 84% | 42,424 psi | 66% | 2933 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 88% | 28,761 psi | 45% | 2703 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,111 psi | 79% | 3028 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 49,748 psi | 78% | 3038 fps | 95.9% |
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 101 powders for 7 mm WSM loaded with the .284 | 127gr | TWENTY-NINE ERTP. Alliant Reloder-26 delivers the highest muzzle velocity at 3,294 fps; across all powders the maximum-charge window runs from 1,965 fps to 3,294 fps. Accurate 3100 gives the best case fill at 100 %, and 101 of the 101 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 127.0 gr projectile in 0.284" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, 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 | TWENTY-NINE ERTP 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.