Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 130gr | Sierra HPBT MatchKing bullet and 84 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.
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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 2700 | <<locked>> | 82% | 56,217 psi | 88% | 3084 fps | 98.7% |
| Accurate 3100 | <<locked>> | 98% | 55,709 psi | 87% | 3136 fps | 99.6% |
| Accurate 4064 | <<locked>> | 82% | 55,898 psi | 88% | 3071 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 57,348 psi | 90% | 3189 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 57,029 psi | 89% | 3287 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 84% | 55,579 psi | 87% | 3104 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,462 psi | 85% | 3173 fps | 97.8% |
| ADI AR 2213 | <<locked>> | 98% | 56,043 psi | 88% | 3232 fps | 97% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 54,708 psi | 86% | 3169 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,623 psi | 89% | 3130 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,666 psi | 89% | 3150 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,143 psi | 85% | 3186 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,695 psi | 87% | 3212 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 57,682 psi | 90% | 3222 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,434 psi | 87% | 3225 fps | 98.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 55,999 psi | 88% | 3205 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,486 psi | 76% | 3130 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 96% | 56,637 psi | 89% | 3301 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,157 psi | 85% | 3202 fps | 97.9% |
| Bofors RP3 | <<locked>> | 84% | 57,740 psi | 90% | 3146 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 55,434 psi | 87% | 3225 fps | 98.2% |
| Bofors RP7 | <<locked>> | 88% | 56,782 psi | 89% | 3130 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 82% | 54,331 psi | 85% | 3107 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 88% | 55,492 psi | 87% | 3179 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 86% | 54,882 psi | 86% | 3136 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 96% | 55,941 psi | 88% | 3166 fps | 96.3% |
| Hodgdon H4831 SC | <<locked>> | 96% | 54,708 psi | 86% | 3143 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,810 psi | 86% | 3110 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,630 psi | 75% | 3173 fps | 97.4% |
| Hodgdon Superformance | <<locked>> | 88% | 55,912 psi | 88% | 3215 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,579 psi | 57% | 1995 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,853 psi | 86% | 3084 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,305 psi | 90% | 3120 fps | 99.3% |
| IMR 4350 | <<locked>> | 90% | 54,505 psi | 85% | 3107 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,766 psi | 86% | 3100 fps | 99% |
| IMR 4831 | <<locked>> | 92% | 57,522 psi | 90% | 3173 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 57,348 psi | 90% | 3156 fps | 96.8% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,276 psi | 90% | 3264 fps | 97.4% |
| Lovex S062 | <<locked>> | 82% | 55,390 psi | 87% | 3077 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,259 psi | 87% | 3100 fps | 99.7% |
| Lovex S070 | <<locked>> | 90% | 56,782 psi | 89% | 3150 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,429 psi | 77% | 3028 fps | 99% |
| Norma 203B | <<locked>> | 82% | 55,956 psi | 88% | 3136 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,477 psi | 87% | 3166 fps | 97.9% |
| Norma MRP | <<locked>> | 96% | 55,129 psi | 86% | 3251 fps | 99.2% |
| Norma URP | <<locked>> | 90% | 55,825 psi | 87% | 3169 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 57,014 psi | 89% | 3163 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 53,911 psi | 84% | 3215 fps | 97% |
| Ramshot Hunter | <<locked>> | 90% | 54,679 psi | 86% | 3166 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,170 psi | 82% | 3146 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,333 psi | 59% | 2044 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,595 psi | 90% | 3146 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,955 psi | 86% | 3202 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 57,334 psi | 90% | 3212 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,724 psi | 87% | 3238 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,877 psi | 75% | 3166 fps | 98.5% |
| Rottweil R 902 | <<locked>> | 82% | 57,087 psi | 89% | 3091 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 54,099 psi | 85% | 3087 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,043 psi | 88% | 3143 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 96% | 56,913 psi | 89% | 3205 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 88% | 56,782 psi | 89% | 3130 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,259 psi | 87% | 3100 fps | 99.7% |
| Shooters World Precision | <<locked>> | 82% | 55,390 psi | 87% | 3077 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,782 psi | 89% | 3150 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,854 psi | 88% | 3150 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,679 psi | 86% | 2966 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,592 psi | 86% | 3048 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,434 psi | 88% | 3202 fps | 98.4% |
| Somchem S355 | <<locked>> | 86% | 57,508 psi | 90% | 3136 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,273 psi | 85% | 3071 fps | 95.9% |
| Somchem S365 | <<locked>> | 92% | 55,564 psi | 87% | 3173 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 57,493 psi | 90% | 3179 fps | 99% |
| Vihtavuori N135 | <<locked>> | 82% | 57,682 psi | 90% | 3048 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 55,332 psi | 87% | 3054 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,128 psi | 85% | 3107 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,145 psi | 90% | 3156 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 82% | 56,173 psi | 88% | 3058 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,101 psi | 89% | 3169 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 54,969 psi | 86% | 3182 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,201 psi | 87% | 3238 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 57,624 psi | 90% | 3123 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,753 psi | 87% | 3186 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,533 psi | 82% | 3284 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 53,911 psi | 84% | 3110 fps | 97.8% |
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% | 52,504 psi | 82% | 3018 fps | 98.2% |
| Accurate 3100 | <<locked>> | 86% | 36,854 psi | 58% | 2766 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 52,359 psi | 82% | 3018 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,509 psi | 63% | 2874 fps | 98.5% |
| Accurate High Country | <<locked>> | 92% | 49,516 psi | 78% | 3146 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 49,095 psi | 77% | 2992 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 44,715 psi | 70% | 2979 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 94% | 48,689 psi | 76% | 3091 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 44,846 psi | 70% | 2979 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,966 psi | 78% | 3018 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,098 psi | 83% | 3091 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,146 psi | 61% | 2884 fps | 98.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,889 psi | 70% | 3022 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 44,367 psi | 70% | 2969 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 92% | 45,063 psi | 71% | 3025 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,834 psi | 45% | 2608 fps | 96.3% |
| Alliant Reloder-25 | <<locked>> | 90% | 35,012 psi | 55% | 2805 fps | 95.8% |
| Alliant Reloder-26 | 65.7 gr | 82% | 33,460 psi | 52% | 2802 fps | 96% |
| Bofors RP15 | <<locked>> | 94% | 44,425 psi | 70% | 3009 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 50,560 psi | 79% | 3031 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 45,063 psi | 71% | 3025 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 44,034 psi | 69% | 2890 fps | 96.5% |
| Hodgdon H380 | <<locked>> | 80% | 50,662 psi | 79% | 3041 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 42,409 psi | 66% | 2923 fps | 96.6% |
| Hodgdon H4350 | <<locked>> | 80% | 45,223 psi | 71% | 2949 fps | 96.1% |
| Hodgdon H4831 | <<locked>> | 94% | 52,286 psi | 82% | 3100 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 94% | 51,126 psi | 80% | 3077 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,709 psi | 58% | 2766 fps | 99% |
| Hodgdon Retumbo | <<locked>> | 96% | 41,698 psi | 65% | 3025 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 41,466 psi | 65% | 2933 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,383 psi | 43% | 1788 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,605 psi | 81% | 3028 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,780 psi | 84% | 3061 fps | 98.9% |
| IMR 4350 | <<locked>> | 80% | 39,653 psi | 62% | 2805 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,440 psi | 71% | 2920 fps | 97.3% |
| IMR 4831 | <<locked>> | 80% | 38,943 psi | 61% | 2825 fps | 98.2% |
| IMR 4955 Enduron | <<locked>> | 92% | 50,473 psi | 79% | 3031 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 96% | 49,980 psi | 78% | 3130 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 51,909 psi | 81% | 3022 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,960 psi | 67% | 2867 fps | 98% |
| Lovex S070 | <<locked>> | 80% | 41,336 psi | 65% | 2848 fps | 96.5% |
| Lovex S071 | <<locked>> | 90% | 35,839 psi | 56% | 2740 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 52,475 psi | 82% | 3074 fps | 100% |
| Norma 204 | <<locked>> | 84% | 45,194 psi | 71% | 2966 fps | 95.5% |
| Norma MRP | 66.9 gr | 86% | 38,595 psi | 60% | 2907 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 40,132 psi | 63% | 2867 fps | 98.3% |
| Ramshot Big Game | <<locked>> | 80% | 53,214 psi | 83% | 3100 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 46,601 psi | 73% | 3071 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 39,001 psi | 61% | 2851 fps | 96.5% |
| Ramshot Magnum | <<locked>> | 94% | 41,727 psi | 65% | 2933 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,934 psi | 44% | 1831 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,502 psi | 79% | 3022 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,659 psi | 75% | 3081 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,437 psi | 63% | 2890 fps | 98.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,943 psi | 61% | 2897 fps | 97.7% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 38,566 psi | 60% | 2936 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 53,722 psi | 84% | 3038 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,587 psi | 75% | 2972 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 49,139 psi | 77% | 3015 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 88% | 43,569 psi | 68% | 2953 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 44,034 psi | 69% | 2890 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,960 psi | 67% | 2867 fps | 98% |
| Shooters World Precision | <<locked>> | 80% | 51,909 psi | 81% | 3022 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,336 psi | 65% | 2848 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,849 psi | 77% | 3028 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,298 psi | 76% | 2867 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,235 psi | 66% | 2808 fps | 96.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 43,178 psi | 68% | 2946 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 47,558 psi | 75% | 2969 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 50,691 psi | 79% | 3005 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 36,666 psi | 57% | 2818 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 41,365 psi | 65% | 2871 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 54,201 psi | 85% | 2995 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,571 psi | 71% | 2890 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,452 psi | 65% | 2864 fps | 98.6% |
| Vihtavuori N165 | <<locked>> | 90% | 40,857 psi | 64% | 2848 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 52,504 psi | 82% | 3002 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,915 psi | 64% | 2864 fps | 98.3% |
| Vihtavuori N555 | <<locked>> | 80% | 32,213 psi | 50% | 2697 fps | 96.5% |
| Vihtavuori N560 | 73.1 gr | 94% | 51,372 psi | 81% | 3166 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,683 psi | 64% | 2831 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 42,612 psi | 67% | 2930 fps | 96.7% |
| Winchester StaBALL HD | <<locked>> | 82% | 27,369 psi | 43% | 2644 fps | 96.4% |
| Winchester Supreme 780 | <<locked>> | 90% | 43,671 psi | 68% | 2917 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 84 powders for 7 mm Weath. Mag. loaded with the .284 | 130gr | Sierra HPBT MatchKing. Alliant Reloder-26 delivers the highest muzzle velocity at 3,301 fps; across all powders the maximum-charge window runs from 1,995 fps to 3,301 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 84 of the 84 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 1:11.5 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 | Sierra HPBT MatchKing 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.