Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 127gr | Geco ZERO LG bullet and 97 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-26 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.
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% | 57,101 psi | 89% | 3068 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,419 psi | 87% | 3091 fps | 98.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,243 psi | 83% | 3123 fps | 99.1% |
| Accurate 4064 | <<locked>> | 86% | 57,624 psi | 90% | 3130 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,274 psi | 87% | 3182 fps | 99.9% |
| Accurate High Country | <<locked>> | 98% | 54,679 psi | 86% | 3271 fps | 96.5% |
| ADI AR 2206H | <<locked>> | 82% | 56,913 psi | 89% | 3166 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 54,868 psi | 86% | 3114 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 56,768 psi | 89% | 3232 fps | 97.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 53,998 psi | 85% | 3238 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 56,884 psi | 89% | 3228 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,535 psi | 87% | 3140 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 55,579 psi | 87% | 3159 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 56,289 psi | 88% | 3251 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 53,795 psi | 84% | 3212 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 56,014 psi | 88% | 3215 fps | 97.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,301 psi | 84% | 3212 fps | 97.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,995 psi | 78% | 3143 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,540 psi | 68% | 3045 fps | 98.2% |
| Alliant Reloder-26 | <<locked>> | 98% | 53,998 psi | 85% | 3291 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 57,116 psi | 90% | 3182 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,559 psi | 76% | 3120 fps | 96.1% |
| Bofors RP3 | <<locked>> | 86% | 56,231 psi | 88% | 3153 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,301 psi | 84% | 3212 fps | 97.3% |
| Bofors RP7 | <<locked>> | 90% | 55,738 psi | 87% | 3133 fps | 98.4% |
| Hodgdon H380 | <<locked>> | 86% | 56,840 psi | 89% | 3173 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 54,157 psi | 85% | 3182 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 90% | 57,508 psi | 90% | 3202 fps | 98.1% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 57,276 psi | 90% | 3205 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 82% | 57,551 psi | 90% | 3173 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 56,507 psi | 89% | 3166 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,404 psi | 85% | 3153 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 54,331 psi | 85% | 3215 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,114 psi | 57% | 1991 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,071 psi | 86% | 3117 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,201 psi | 85% | 3097 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,840 psi | 89% | 3133 fps | 98.9% |
| IMR 4350 | <<locked>> | 94% | 57,014 psi | 89% | 3169 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 90% | 57,493 psi | 90% | 3166 fps | 98.9% |
| IMR 4831 | <<locked>> | 94% | 55,840 psi | 88% | 3176 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 57,058 psi | 89% | 3192 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 56,130 psi | 88% | 3150 fps | 95.9% |
| Lovex D073.6 | <<locked>> | 82% | 57,435 psi | 90% | 3136 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 55,637 psi | 87% | 3081 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 57,740 psi | 90% | 3143 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 57,479 psi | 90% | 3159 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 55,303 psi | 87% | 3146 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,830 psi | 69% | 2946 fps | 97.5% |
| Norma 201 | <<locked>> | 82% | 55,317 psi | 87% | 3100 fps | 100% |
| Norma 202 | <<locked>> | 82% | 56,376 psi | 88% | 3100 fps | 100% |
| Norma 203B | <<locked>> | 84% | 54,882 psi | 86% | 3143 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,027 psi | 85% | 3159 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 56,869 psi | 89% | 3307 fps | 99.1% |
| Norma URP | <<locked>> | 92% | 54,128 psi | 85% | 3169 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 55,898 psi | 88% | 3173 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 56,753 psi | 89% | 3228 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,296 psi | 73% | 3051 fps | 96.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,796 psi | 58% | 2037 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 56,782 psi | 89% | 3153 fps | 99.3% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 56,782 psi | 89% | 3235 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 57,232 psi | 90% | 3271 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,288 psi | 87% | 3209 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,128 psi | 85% | 3238 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 84% | 56,144 psi | 88% | 3104 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 56,318 psi | 88% | 3150 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 54,737 psi | 86% | 3140 fps | 96.2% |
| Rottweil R 905 | <<locked>> | 98% | 55,013 psi | 86% | 3196 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 90% | 55,738 psi | 87% | 3133 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 92% | 57,479 psi | 90% | 3159 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 82% | 57,435 psi | 90% | 3136 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 57,740 psi | 90% | 3143 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,303 psi | 87% | 3146 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,404 psi | 85% | 3153 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,463 psi | 87% | 3130 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 56,231 psi | 88% | 3031 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 57,537 psi | 90% | 3035 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 57,261 psi | 90% | 3107 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,534 psi | 85% | 3189 fps | 97.5% |
| Somchem S335 | <<locked>> | 82% | 55,883 psi | 88% | 3025 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 56,231 psi | 88% | 3143 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 57,276 psi | 90% | 3228 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 55,680 psi | 87% | 3169 fps | 98.4% |
| Vihtavuori N133 | <<locked>> | 82% | 56,782 psi | 89% | 3012 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 56,550 psi | 89% | 3061 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 57,029 psi | 89% | 3077 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,186 psi | 85% | 3064 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 56,318 psi | 88% | 3166 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,547 psi | 81% | 3081 fps | 97.3% |
| Vihtavuori N540 | <<locked>> | 84% | 55,129 psi | 86% | 3068 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,361 psi | 87% | 3166 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,043 psi | 88% | 3228 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 57,145 psi | 90% | 3294 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,376 psi | 88% | 3130 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,157 psi | 85% | 3182 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,252 psi | 71% | 3196 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,724 psi | 87% | 3140 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 56,202 psi | 88% | 3169 fps | 97.6% |
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% | 50,169 psi | 79% | 2966 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,573 psi | 76% | 2966 fps | 96.8% |
| Accurate 3100 | <<locked>> | 90% | 37,333 psi | 59% | 2805 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 47,529 psi | 74% | 2969 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,042 psi | 56% | 2795 fps | 96.8% |
| Accurate High Country | <<locked>> | 96% | 50,821 psi | 80% | 3199 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 53,403 psi | 84% | 3107 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,252 psi | 71% | 2940 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 92% | 46,456 psi | 73% | 3038 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,227 psi | 79% | 3173 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 46,412 psi | 73% | 3031 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,716 psi | 72% | 2966 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,834 psi | 77% | 3041 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,418 psi | 56% | 2812 fps | 96.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,350 psi | 63% | 2956 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 92% | 45,832 psi | 72% | 3025 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 96% | 46,325 psi | 73% | 3077 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 84% | 29,254 psi | 46% | 2648 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 94% | 35,766 psi | 56% | 2848 fps | 95.4% |
| Alliant Reloder-26 | 65.6 gr | 86% | 34,098 psi | 53% | 2844 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 53,374 psi | 84% | 3120 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 45,426 psi | 71% | 3054 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 45,803 psi | 72% | 2972 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 46,325 psi | 73% | 3077 fps | 95.6% |
| Bofors RP7 | <<locked>> | 82% | 43,018 psi | 67% | 2887 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 46,282 psi | 73% | 2982 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 82% | 40,988 psi | 64% | 2917 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 82% | 44,092 psi | 69% | 2946 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 98% | 53,272 psi | 83% | 3136 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 53,983 psi | 85% | 3117 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,779 psi | 51% | 2697 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,691 psi | 79% | 3094 fps | 100% |
| Hodgdon Superformance | 66.1 gr | 84% | 43,352 psi | 68% | 2999 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,861 psi | 42% | 1781 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,648 psi | 81% | 3061 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,558 psi | 75% | 2979 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,879 psi | 78% | 3005 fps | 97.8% |
| IMR 4350 | <<locked>> | 84% | 41,205 psi | 65% | 2864 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,916 psi | 66% | 2864 fps | 95.7% |
| IMR 4831 | <<locked>> | 80% | 34,722 psi | 54% | 2746 fps | 96.4% |
| IMR 4895 | <<locked>> | 80% | 50,125 psi | 79% | 3074 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 52,678 psi | 83% | 3091 fps | 95.1% |
| Lovex D073.6 | <<locked>> | 80% | 53,548 psi | 84% | 3077 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 52,243 psi | 82% | 3025 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,601 psi | 75% | 2972 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,334 psi | 62% | 2808 fps | 96.5% |
| Lovex S070 | <<locked>> | 82% | 40,059 psi | 63% | 2841 fps | 95.5% |
| Lovex S071 | <<locked>> | 96% | 38,305 psi | 60% | 2828 fps | 95.9% |
| Norma 201 | <<locked>> | 80% | 52,098 psi | 82% | 3048 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,866 psi | 83% | 3045 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,211 psi | 76% | 3028 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 47,079 psi | 74% | 3025 fps | 95.4% |
| Norma MRP | <<locked>> | 92% | 42,380 psi | 66% | 3022 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 36,114 psi | 57% | 2799 fps | 96.7% |
| Ramshot Big Game | <<locked>> | 80% | 48,689 psi | 76% | 3048 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 37,550 psi | 59% | 2841 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 98% | 42,902 psi | 67% | 2979 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,354 psi | 43% | 1824 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,528 psi | 73% | 2969 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,823 psi | 83% | 3169 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,917 psi | 67% | 3022 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,969 psi | 56% | 2815 fps | 96.4% |
| ReloadSwiss RS 70 | 60.5 gr | 80% | 35,143 psi | 55% | 2818 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 49,574 psi | 78% | 2995 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,076 psi | 68% | 2913 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 94% | 51,285 psi | 80% | 3074 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 92% | 44,831 psi | 70% | 3002 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 82% | 43,018 psi | 67% | 2887 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,334 psi | 62% | 2808 fps | 96.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 53,548 psi | 84% | 3077 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,601 psi | 75% | 2972 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 40,059 psi | 63% | 2841 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,353 psi | 70% | 2969 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,822 psi | 81% | 3071 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,895 psi | 83% | 2979 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,628 psi | 70% | 2831 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 41,046 psi | 64% | 2805 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 44,425 psi | 70% | 2999 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 52,736 psi | 83% | 2976 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,540 psi | 68% | 2917 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 32,503 psi | 51% | 2743 fps | 98.7% |
| Somchem S385 | <<locked>> | 90% | 42,569 psi | 67% | 2920 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 53,490 psi | 84% | 2966 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,705 psi | 78% | 2959 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,125 psi | 79% | 2972 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,582 psi | 65% | 2841 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 37,521 psi | 59% | 2802 fps | 97.2% |
| Vihtavuori N165 | <<locked>> | 96% | 44,802 psi | 70% | 2956 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 48,341 psi | 76% | 2959 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,927 psi | 58% | 2795 fps | 96.7% |
| Vihtavuori N555 | <<locked>> | 82% | 30,226 psi | 47% | 2671 fps | 95% |
| Vihtavuori N560 | <<locked>> | 98% | 53,156 psi | 83% | 3225 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,825 psi | 58% | 2769 fps | 99% |
| Winchester 760 | <<locked>> | 82% | 41,191 psi | 65% | 2920 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 86% | 27,615 psi | 43% | 2671 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,040 psi | 82% | 3077 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 45,136 psi | 71% | 2966 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 97 powders for 7 mm Weath. Mag. loaded with the .284 | 127gr | Geco ZERO LG. Norma MRP delivers the highest muzzle velocity at 3,307 fps; across all powders the maximum-charge window runs from 1,991 fps to 3,307 fps. Accurate 3100 gives the best case fill at 100 %, and 97 of the 97 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 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-22, Alliant Reloder-23 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-26, Hodgdon Superformance rank at the top here: for 7 mm Weath. Mag. with the .284 | 127gr | Geco ZERO LG 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.