Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 120gr | Sierra Pro-Hunter bullet and 81 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, ReloadSwiss RS 70 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% | 55,840 psi | 88% | 3189 fps | 98.3% |
| Accurate 3100 | <<locked>> | 98% | 55,274 psi | 87% | 3235 fps | 99.4% |
| Accurate 4064 | <<locked>> | 82% | 55,448 psi | 87% | 3182 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 56,753 psi | 89% | 3291 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 56,594 psi | 89% | 3386 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 84% | 55,085 psi | 86% | 3209 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,143 psi | 85% | 3274 fps | 97.3% |
| ADI AR 2213 | <<locked>> | 98% | 55,477 psi | 87% | 3327 fps | 96.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,202 psi | 88% | 3238 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,275 psi | 88% | 3261 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 57,406 psi | 90% | 3356 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,114 psi | 86% | 3317 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 57,145 psi | 90% | 3320 fps | 97.9% |
| Alliant Reloder-22 | <<locked>> | 98% | 54,911 psi | 86% | 3320 fps | 97.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 55,579 psi | 87% | 3310 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,153 psi | 75% | 3225 fps | 99.2% |
| Alliant Reloder-26 | <<locked>> | 96% | 56,173 psi | 88% | 3399 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,853 psi | 84% | 3297 fps | 97.3% |
| Bofors RP3 | <<locked>> | 84% | 57,363 psi | 90% | 3258 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 54,911 psi | 86% | 3320 fps | 97.6% |
| Bofors RP7 | <<locked>> | 88% | 56,376 psi | 88% | 3235 fps | 98.5% |
| Hodgdon H380 | <<locked>> | 84% | 57,551 psi | 90% | 3274 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 88% | 55,172 psi | 86% | 3284 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 86% | 54,375 psi | 85% | 3235 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,331 psi | 85% | 3215 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,224 psi | 74% | 3258 fps | 96.5% |
| Hodgdon Superformance | <<locked>> | 88% | 55,492 psi | 87% | 3317 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,477 psi | 57% | 2087 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,520 psi | 85% | 3192 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,942 psi | 89% | 3228 fps | 99% |
| IMR 4350 | <<locked>> | 92% | 57,711 psi | 90% | 3271 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,447 psi | 85% | 3202 fps | 98.6% |
| IMR 4831 | <<locked>> | 92% | 57,130 psi | 90% | 3281 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 56,913 psi | 89% | 3255 fps | 96.2% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 56,840 psi | 89% | 3363 fps | 96.7% |
| Lovex S062 | <<locked>> | 82% | 54,752 psi | 86% | 3186 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,853 psi | 86% | 3205 fps | 99.5% |
| Lovex S070 | <<locked>> | 90% | 56,362 psi | 88% | 3251 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,023 psi | 77% | 3123 fps | 98.5% |
| Norma 203B | <<locked>> | 82% | 55,637 psi | 87% | 3245 fps | 100% |
| Norma 204 | <<locked>> | 90% | 54,955 psi | 86% | 3261 fps | 97.3% |
| Norma MRP | <<locked>> | 96% | 54,708 psi | 86% | 3350 fps | 98.8% |
| Norma URP | <<locked>> | 90% | 55,361 psi | 87% | 3274 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 82% | 56,724 psi | 89% | 3271 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 53,417 psi | 84% | 3307 fps | 96.3% |
| Ramshot Hunter | <<locked>> | 90% | 54,157 psi | 85% | 3264 fps | 99.2% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,851 psi | 81% | 3241 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,159 psi | 58% | 2136 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,334 psi | 90% | 3255 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,549 psi | 85% | 3314 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 56,913 psi | 89% | 3314 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,201 psi | 87% | 3340 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,674 psi | 75% | 3255 fps | 97.8% |
| Rottweil R 902 | <<locked>> | 82% | 56,739 psi | 89% | 3202 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 57,435 psi | 90% | 3255 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 55,550 psi | 87% | 3241 fps | 96.5% |
| Rottweil R 905 | <<locked>> | 96% | 56,652 psi | 89% | 3307 fps | 97.9% |
| Rottweil R 907 | <<locked>> | 88% | 56,376 psi | 88% | 3235 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,853 psi | 86% | 3205 fps | 99.5% |
| Shooters World Precision | <<locked>> | 82% | 54,752 psi | 86% | 3186 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,362 psi | 88% | 3251 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,332 psi | 87% | 3255 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,360 psi | 85% | 3077 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,317 psi | 85% | 3146 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,173 psi | 88% | 3304 fps | 97.8% |
| Somchem S355 | <<locked>> | 86% | 57,029 psi | 89% | 3245 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 57,725 psi | 90% | 3235 fps | 96.1% |
| Somchem S365 | <<locked>> | 92% | 55,114 psi | 86% | 3278 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 57,116 psi | 90% | 3278 fps | 98.6% |
| Vihtavuori N135 | <<locked>> | 82% | 57,145 psi | 90% | 3156 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 57,421 psi | 90% | 3173 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 54,984 psi | 86% | 3163 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 57,276 psi | 90% | 3268 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 56,536 psi | 89% | 3248 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 82% | 55,724 psi | 87% | 3163 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,666 psi | 89% | 3271 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 96% | 54,534 psi | 85% | 3284 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 57,319 psi | 90% | 3228 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,172 psi | 86% | 3284 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,011 psi | 82% | 3379 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 57,421 psi | 90% | 3274 fps | 97.9% |
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% | 52,098 psi | 82% | 3120 fps | 97.6% |
| Accurate 3100 | <<locked>> | 86% | 36,448 psi | 57% | 2844 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 52,083 psi | 82% | 3127 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,118 psi | 63% | 2963 fps | 97.9% |
| Accurate High Country | <<locked>> | 94% | 52,779 psi | 83% | 3314 fps | 96% |
| ADI AR 2208 | <<locked>> | 80% | 48,646 psi | 76% | 3091 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 47,384 psi | 74% | 3140 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 96% | 51,779 psi | 81% | 3251 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,414 psi | 77% | 3120 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,692 psi | 83% | 3199 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,711 psi | 61% | 2972 fps | 97.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,367 psi | 70% | 3120 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 46,934 psi | 74% | 3123 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 92% | 44,773 psi | 70% | 3117 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,616 psi | 45% | 2687 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 92% | 37,057 psi | 58% | 2953 fps | 95.9% |
| Alliant Reloder-26 | 70.6 gr | 84% | 35,737 psi | 56% | 2956 fps | 96.2% |
| Bofors RP15 | <<locked>> | 96% | 47,108 psi | 74% | 3166 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 50,067 psi | 78% | 3133 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 44,773 psi | 70% | 3117 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 43,787 psi | 69% | 2986 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 50,343 psi | 79% | 3146 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 80% | 41,901 psi | 66% | 3012 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 80% | 44,773 psi | 70% | 3041 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,332 psi | 57% | 2854 fps | 98.5% |
| Hodgdon Retumbo | <<locked>> | 98% | 44,164 psi | 69% | 3182 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 41,118 psi | 64% | 3018 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,354 psi | 43% | 1873 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,184 psi | 80% | 3133 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,359 psi | 84% | 3166 fps | 98.5% |
| IMR 4350 | <<locked>> | 82% | 41,887 psi | 66% | 2959 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,150 psi | 71% | 3018 fps | 96.6% |
| IMR 4831 | <<locked>> | 80% | 38,406 psi | 60% | 2907 fps | 97.5% |
| IMR 4955 Enduron | <<locked>> | 94% | 53,534 psi | 84% | 3192 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 98% | 53,026 psi | 83% | 3291 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 51,474 psi | 81% | 3130 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,743 psi | 67% | 2966 fps | 97.4% |
| Lovex S070 | <<locked>> | 80% | 40,843 psi | 64% | 2933 fps | 95.7% |
| Lovex S071 | <<locked>> | 92% | 37,782 psi | 59% | 2881 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 52,083 psi | 82% | 3182 fps | 100% |
| Norma 204 | <<locked>> | 86% | 47,964 psi | 75% | 3127 fps | 95.6% |
| Norma MRP | 71.8 gr | 88% | 41,089 psi | 64% | 3061 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 39,610 psi | 62% | 2953 fps | 97.7% |
| Ramshot Big Game | <<locked>> | 80% | 52,852 psi | 83% | 3209 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 49,705 psi | 78% | 3235 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 38,638 psi | 61% | 2936 fps | 95.6% |
| Ramshot Magnum | <<locked>> | 96% | 44,585 psi | 70% | 3094 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,862 psi | 44% | 1916 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,125 psi | 79% | 3123 fps | 98.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,137 psi | 74% | 3182 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,972 psi | 63% | 2979 fps | 97.6% |
| ReloadSwiss RS 70 | 66.6 gr | 80% | 38,638 psi | 61% | 2982 fps | 96.9% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 41,147 psi | 64% | 3094 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 53,345 psi | 84% | 3146 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,036 psi | 74% | 3071 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 52,141 psi | 82% | 3176 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 90% | 46,166 psi | 72% | 3107 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 43,787 psi | 69% | 2986 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,743 psi | 67% | 2966 fps | 97.4% |
| Shooters World Precision | <<locked>> | 80% | 51,474 psi | 81% | 3130 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,843 psi | 64% | 2933 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,472 psi | 76% | 3130 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,877 psi | 75% | 2972 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,843 psi | 66% | 2900 fps | 95.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 45,759 psi | 72% | 3100 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 47,311 psi | 74% | 3074 fps | 99.9% |
| Somchem S361 | <<locked>> | 92% | 53,867 psi | 84% | 3166 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 36,289 psi | 57% | 2907 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 43,816 psi | 69% | 3022 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 53,621 psi | 84% | 3107 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,766 psi | 84% | 3117 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,078 psi | 71% | 2989 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,075 psi | 64% | 2959 fps | 98.1% |
| Vihtavuori N165 | <<locked>> | 92% | 43,294 psi | 68% | 2995 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 52,214 psi | 82% | 3107 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,669 psi | 64% | 2959 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 80% | 31,763 psi | 50% | 2776 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,335 psi | 63% | 2923 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 42,105 psi | 66% | 3018 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 84% | 29,008 psi | 45% | 2789 fps | 96.5% |
| Winchester Supreme 780 | <<locked>> | 92% | 46,427 psi | 73% | 3071 fps | 95.4% |
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 81 powders for 7 mm Weath. Mag. loaded with the .284 | 120gr | Sierra Pro-Hunter. Alliant Reloder-26 delivers the highest muzzle velocity at 3,399 fps; across all powders the maximum-charge window runs from 2,087 fps to 3,399 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 81 of the 81 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 120.0 gr projectile in 0.284" calls for a 1:16.0 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, ReloadSwiss RS 70, Alliant Reloder-26 rank at the top here: for 7 mm Weath. Mag. with the .284 | 120gr | Sierra Pro-Hunter 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.