Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 130gr | NorthFork Bonded Core bullet and 85 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and Alliant Reloder-26.
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 2700 | <<locked>> | 82% | 56,289 psi | 88% | 3084 fps | 98.7% |
| Accurate 3100 | <<locked>> | 98% | 55,535 psi | 87% | 3130 fps | 99.6% |
| Accurate 4064 | <<locked>> | 82% | 55,956 psi | 88% | 3071 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 57,406 psi | 90% | 3189 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 56,826 psi | 89% | 3281 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 84% | 55,622 psi | 87% | 3100 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,534 psi | 85% | 3173 fps | 97.9% |
| ADI AR 2213 | <<locked>> | 98% | 55,825 psi | 87% | 3222 fps | 96.9% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 54,563 psi | 86% | 3166 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,666 psi | 89% | 3130 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,724 psi | 89% | 3150 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,215 psi | 85% | 3189 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,506 psi | 87% | 3209 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 57,479 psi | 90% | 3215 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,288 psi | 87% | 3222 fps | 98.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,086 psi | 88% | 3205 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,530 psi | 76% | 3130 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 96% | 56,724 psi | 89% | 3297 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,201 psi | 85% | 3199 fps | 97.9% |
| Bofors RP3 | <<locked>> | 82% | 54,085 psi | 85% | 3087 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 55,288 psi | 87% | 3222 fps | 98.2% |
| Bofors RP7 | <<locked>> | 88% | 56,855 psi | 89% | 3130 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 82% | 54,143 psi | 85% | 3104 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 88% | 55,535 psi | 87% | 3179 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 86% | 54,955 psi | 86% | 3136 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 96% | 56,028 psi | 88% | 3166 fps | 96.3% |
| Hodgdon H4831 SC | <<locked>> | 96% | 54,766 psi | 86% | 3143 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,621 psi | 86% | 3107 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,485 psi | 74% | 3166 fps | 97.3% |
| Hodgdon Superformance | <<locked>> | 88% | 56,014 psi | 88% | 3215 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,608 psi | 57% | 1995 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,940 psi | 86% | 3084 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,377 psi | 90% | 3120 fps | 99.3% |
| IMR 4350 | <<locked>> | 90% | 54,549 psi | 85% | 3107 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,810 psi | 86% | 3100 fps | 99% |
| IMR 4831 | <<locked>> | 92% | 57,595 psi | 90% | 3176 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 57,145 psi | 90% | 3150 fps | 96.8% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,101 psi | 89% | 3261 fps | 97.3% |
| Lovex S062 | <<locked>> | 82% | 55,187 psi | 86% | 3074 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,114 psi | 86% | 3097 fps | 99.7% |
| Lovex S070 | <<locked>> | 90% | 56,608 psi | 89% | 3143 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,516 psi | 78% | 3031 fps | 99% |
| Norma 203B | <<locked>> | 82% | 56,028 psi | 88% | 3136 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,303 psi | 87% | 3156 fps | 97.8% |
| Norma MRP | <<locked>> | 96% | 54,984 psi | 86% | 3245 fps | 99.1% |
| Norma URP | <<locked>> | 90% | 55,666 psi | 87% | 3166 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 57,087 psi | 89% | 3163 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,012 psi | 85% | 3215 fps | 97.1% |
| Ramshot Hunter | <<locked>> | 90% | 54,476 psi | 85% | 3163 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,996 psi | 81% | 3140 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,362 psi | 59% | 2044 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,667 psi | 90% | 3146 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,795 psi | 86% | 3199 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 57,392 psi | 90% | 3209 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,535 psi | 87% | 3235 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,906 psi | 75% | 3166 fps | 98.5% |
| Rottweil R 902 | <<locked>> | 82% | 57,130 psi | 90% | 3091 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 54,186 psi | 85% | 3084 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 55,840 psi | 88% | 3140 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 96% | 56,956 psi | 89% | 3205 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 88% | 56,855 psi | 89% | 3130 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,114 psi | 86% | 3097 fps | 99.7% |
| Shooters World Precision | <<locked>> | 82% | 55,187 psi | 86% | 3074 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,608 psi | 89% | 3143 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,651 psi | 87% | 3146 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,723 psi | 86% | 2966 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,665 psi | 86% | 3045 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,478 psi | 89% | 3199 fps | 98.3% |
| Somchem S355 | <<locked>> | 86% | 57,580 psi | 90% | 3136 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,085 psi | 85% | 3068 fps | 95.9% |
| Somchem S365 | <<locked>> | 92% | 55,622 psi | 87% | 3173 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 57,580 psi | 90% | 3179 fps | 99.1% |
| Vihtavuori N135 | <<locked>> | 82% | 57,711 psi | 90% | 3048 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 57,711 psi | 90% | 3058 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 55,376 psi | 87% | 3054 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,172 psi | 85% | 3107 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 56,971 psi | 89% | 3150 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 82% | 55,999 psi | 88% | 3054 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,898 psi | 89% | 3166 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 54,781 psi | 86% | 3176 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 54,998 psi | 86% | 3232 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 57,682 psi | 90% | 3123 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,535 psi | 87% | 3179 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,330 psi | 82% | 3278 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 53,998 psi | 85% | 3110 fps | 97.7% |
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 2700 | <<locked>> | 80% | 52,547 psi | 82% | 3018 fps | 98.2% |
| Accurate 3100 | <<locked>> | 86% | 36,869 psi | 58% | 2762 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 52,431 psi | 82% | 3015 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,524 psi | 64% | 2871 fps | 98.5% |
| Accurate High Country | <<locked>> | 92% | 49,385 psi | 77% | 3143 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 49,124 psi | 77% | 2992 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 44,585 psi | 70% | 2976 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 94% | 48,762 psi | 76% | 3087 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 44,904 psi | 70% | 2976 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,792 psi | 78% | 3012 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,171 psi | 83% | 3091 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,160 psi | 61% | 2884 fps | 98.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,744 psi | 70% | 3018 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 44,425 psi | 70% | 2969 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 92% | 45,092 psi | 71% | 3025 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,863 psi | 45% | 2608 fps | 96.3% |
| Alliant Reloder-25 | <<locked>> | 90% | 35,041 psi | 55% | 2805 fps | 95.8% |
| Alliant Reloder-26 | 65.7 gr | 82% | 33,504 psi | 53% | 2802 fps | 96% |
| Bofors RP15 | <<locked>> | 94% | 44,469 psi | 70% | 3009 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 50,633 psi | 79% | 3031 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 45,092 psi | 71% | 3025 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 44,063 psi | 69% | 2887 fps | 96.5% |
| Hodgdon H380 | <<locked>> | 80% | 50,720 psi | 79% | 3041 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 42,467 psi | 67% | 2923 fps | 96.6% |
| Hodgdon H4350 | <<locked>> | 80% | 45,252 psi | 71% | 2949 fps | 96.1% |
| Hodgdon H4831 | <<locked>> | 94% | 52,330 psi | 82% | 3100 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 94% | 51,198 psi | 80% | 3081 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,767 psi | 58% | 2766 fps | 99% |
| Hodgdon Retumbo | <<locked>> | 96% | 41,582 psi | 65% | 3022 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 41,524 psi | 65% | 2933 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,398 psi | 43% | 1788 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,692 psi | 81% | 3028 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,838 psi | 84% | 3058 fps | 98.9% |
| IMR 4350 | <<locked>> | 80% | 39,697 psi | 62% | 2808 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,484 psi | 71% | 2920 fps | 97.3% |
| IMR 4831 | <<locked>> | 80% | 38,798 psi | 61% | 2818 fps | 98.2% |
| IMR 4955 Enduron | <<locked>> | 92% | 50,546 psi | 79% | 3031 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 96% | 49,777 psi | 78% | 3123 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 51,953 psi | 81% | 3022 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,004 psi | 67% | 2867 fps | 98% |
| Lovex S070 | <<locked>> | 80% | 41,365 psi | 65% | 2848 fps | 96.5% |
| Lovex S071 | <<locked>> | 90% | 35,708 psi | 56% | 2733 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 52,504 psi | 82% | 3074 fps | 100% |
| Norma 204 | <<locked>> | 84% | 45,063 psi | 71% | 2963 fps | 95.4% |
| Norma MRP | 66.9 gr | 86% | 38,624 psi | 61% | 2904 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 40,161 psi | 63% | 2867 fps | 98.3% |
| Ramshot Big Game | <<locked>> | 80% | 53,287 psi | 84% | 3100 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 46,644 psi | 73% | 3068 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 39,030 psi | 61% | 2851 fps | 96.5% |
| Ramshot Magnum | <<locked>> | 94% | 41,611 psi | 65% | 2930 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,949 psi | 44% | 1831 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,575 psi | 79% | 3022 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,500 psi | 74% | 3077 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,495 psi | 63% | 2894 fps | 98.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,986 psi | 61% | 2897 fps | 97.6% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 38,638 psi | 61% | 2933 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 53,751 psi | 84% | 3038 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,645 psi | 75% | 2972 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 49,168 psi | 77% | 3015 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 88% | 43,598 psi | 68% | 2953 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 44,063 psi | 69% | 2887 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,004 psi | 67% | 2867 fps | 98% |
| Shooters World Precision | <<locked>> | 80% | 51,953 psi | 81% | 3022 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,365 psi | 65% | 2848 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,907 psi | 77% | 3028 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,356 psi | 76% | 2867 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,090 psi | 66% | 2805 fps | 96.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 43,221 psi | 68% | 2943 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 47,587 psi | 75% | 2969 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 50,575 psi | 79% | 3002 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 36,724 psi | 58% | 2818 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 41,423 psi | 65% | 2871 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 54,259 psi | 85% | 2995 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 54,375 psi | 85% | 3009 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,629 psi | 72% | 2894 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,510 psi | 65% | 2864 fps | 98.6% |
| Vihtavuori N165 | <<locked>> | 90% | 40,915 psi | 64% | 2848 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 52,562 psi | 82% | 2999 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,973 psi | 64% | 2864 fps | 98.3% |
| Vihtavuori N555 | <<locked>> | 80% | 32,082 psi | 50% | 2694 fps | 96.4% |
| Vihtavuori N560 | 73.1 gr | 94% | 51,416 psi | 81% | 3166 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,553 psi | 64% | 2828 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 42,467 psi | 67% | 2923 fps | 96.6% |
| Winchester StaBALL HD | <<locked>> | 82% | 27,383 psi | 43% | 2644 fps | 96.3% |
| Winchester Supreme 780 | <<locked>> | 90% | 43,714 psi | 69% | 2913 fps | 95.2% |
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 85 powders for 7 mm Weath. Mag. loaded with the .284 | 130gr | NorthFork Bonded Core. Alliant Reloder-26 delivers the highest muzzle velocity at 3,297 fps; across all powders the maximum-charge window runs from 1,995 fps to 3,297 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 85 of the 85 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 130.0 gr projectile in 0.284" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, Bofors RP15 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. Norma MRP, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for 7 mm Weath. Mag. with the .284 | 130gr | NorthFork Bonded Core 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.