Load Specifications
Load data in caliber 7 mm Weath. Mag. with .283 | 140gr | Rhino Penetrator bullet and 82 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Accurate High Country and Norma MRP.
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 3100 | <<locked>> | 98% | 57,508 psi | 90% | 3064 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 57,609 psi | 90% | 2986 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 55,274 psi | 87% | 3051 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 55,071 psi | 86% | 3153 fps | 97.8% |
| Accurate MAGPRO | <<locked>> | 96% | 56,115 psi | 88% | 3156 fps | 96.7% |
| ADI AR 2208 | <<locked>> | 84% | 56,898 psi | 89% | 3018 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 56,057 psi | 88% | 3100 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 98% | 57,682 psi | 90% | 3159 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,987 psi | 63% | 2858 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,694 psi | 86% | 2989 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 56,130 psi | 88% | 3110 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 57,363 psi | 90% | 3130 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,651 psi | 87% | 3087 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 98% | 57,276 psi | 90% | 3156 fps | 99% |
| Alliant Reloder-23 | <<locked>> | 98% | 54,520 psi | 85% | 3077 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 50,328 psi | 79% | 3068 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 54,607 psi | 86% | 3163 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 56,144 psi | 88% | 3136 fps | 98.7% |
| Bofors RP3 | <<locked>> | 82% | 55,608 psi | 87% | 3009 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 46,224 psi | 72% | 2986 fps | 96.1% |
| Bofors RP5 | <<locked>> | 98% | 57,276 psi | 90% | 3156 fps | 99% |
| Bofors RP7 | <<locked>> | 86% | 54,694 psi | 86% | 2995 fps | 99.1% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,661 psi | 78% | 3005 fps | 97.2% |
| Hodgdon H380 | <<locked>> | 82% | 55,854 psi | 88% | 3025 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 57,246 psi | 90% | 3107 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 56,594 psi | 89% | 3064 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 94% | 53,969 psi | 85% | 3035 fps | 96.6% |
| Hodgdon H4831 SC | <<locked>> | 96% | 56,478 psi | 89% | 3077 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 56,536 psi | 89% | 3031 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 49,284 psi | 77% | 3117 fps | 98.5% |
| Hodgdon Superformance | <<locked>> | 86% | 53,795 psi | 84% | 3081 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,738 psi | 58% | 1919 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,362 psi | 88% | 3002 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 56,028 psi | 88% | 3031 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,173 psi | 88% | 3022 fps | 99.5% |
| IMR 4831 | <<locked>> | 90% | 55,767 psi | 87% | 3041 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 55,187 psi | 86% | 3022 fps | 97% |
| IMR 7828 SSC | <<locked>> | 98% | 55,158 psi | 86% | 3130 fps | 97.6% |
| Lovex S062 | <<locked>> | 82% | 56,666 psi | 89% | 2992 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 56,623 psi | 89% | 3022 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 54,665 psi | 86% | 3012 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 51,155 psi | 80% | 2963 fps | 99.5% |
| Norma 203B | <<locked>> | 82% | 57,653 psi | 90% | 3051 fps | 100% |
| Norma 204 | <<locked>> | 90% | 57,029 psi | 89% | 3087 fps | 98.6% |
| Norma MRP | <<locked>> | 96% | 57,101 psi | 89% | 3179 fps | 99.7% |
| Norma URP | <<locked>> | 90% | 57,508 psi | 90% | 3091 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 55,883 psi | 88% | 3153 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 90% | 56,275 psi | 88% | 3091 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 54,027 psi | 85% | 3081 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,536 psi | 59% | 1965 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,579 psi | 87% | 3009 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 56,840 psi | 89% | 3117 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 55,332 psi | 87% | 3074 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 57,609 psi | 90% | 3163 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,647 psi | 78% | 3114 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 84% | 55,941 psi | 88% | 3009 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 57,522 psi | 90% | 3068 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 94% | 55,071 psi | 86% | 3077 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 86% | 54,694 psi | 86% | 2995 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 88% | 56,623 psi | 89% | 3022 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 56,666 psi | 89% | 2992 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 54,665 psi | 86% | 3012 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 57,334 psi | 90% | 3068 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,072 psi | 88% | 2881 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 56,231 psi | 88% | 2972 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,607 psi | 86% | 3071 fps | 98.5% |
| Somchem S355 | <<locked>> | 84% | 55,579 psi | 87% | 2999 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,680 psi | 87% | 3002 fps | 96.9% |
| Somchem S365 | <<locked>> | 92% | 57,580 psi | 90% | 3094 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 55,535 psi | 87% | 3045 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 86% | 56,869 psi | 89% | 2972 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 55,695 psi | 87% | 3028 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 55,056 psi | 86% | 3022 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 82% | 57,595 psi | 90% | 2969 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 54,897 psi | 86% | 3031 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 56,855 psi | 89% | 3107 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 57,072 psi | 89% | 3169 fps | 97.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,605 psi | 82% | 3074 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 55,390 psi | 87% | 2986 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 57,450 psi | 90% | 3110 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 54,926 psi | 86% | 3209 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 55,535 psi | 87% | 3038 fps | 98.5% |
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 3100 | <<locked>> | 82% | 33,417 psi | 52% | 2592 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 53,896 psi | 84% | 2933 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,989 psi | 66% | 2812 fps | 99.2% |
| Accurate High Country | 66.8 gr | 88% | 44,541 psi | 70% | 2949 fps | 95.1% |
| Accurate MAGPRO | <<locked>> | 94% | 52,141 psi | 82% | 3084 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 50,357 psi | 79% | 2910 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 43,004 psi | 67% | 2851 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 92% | 47,094 psi | 74% | 2966 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 98% | 37,434 psi | 59% | 2789 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,401 psi | 81% | 2940 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,408 psi | 63% | 2818 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,499 psi | 73% | 2953 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 42,946 psi | 67% | 2848 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 40,741 psi | 64% | 2835 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,878 psi | 47% | 2559 fps | 97.6% |
| Alliant Reloder-25 | <<locked>> | 86% | 31,792 psi | 50% | 2628 fps | 95.1% |
| Alliant Reloder-26 | 62.6 gr | 80% | 32,372 psi | 51% | 2687 fps | 96.4% |
| Bofors RP15 | <<locked>> | 92% | 43,076 psi | 68% | 2887 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 51,938 psi | 81% | 2949 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 43,105 psi | 68% | 2917 fps | 95.1% |
| Bofors RP5 | <<locked>> | 88% | 40,741 psi | 64% | 2835 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 45,266 psi | 71% | 2822 fps | 97.5% |
| Hodgdon H1000 | <<locked>> | 96% | 43,163 psi | 68% | 2871 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 52,243 psi | 82% | 2969 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 43,758 psi | 69% | 2858 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 80% | 46,412 psi | 73% | 2877 fps | 97.1% |
| Hodgdon H4831 | <<locked>> | 92% | 50,343 psi | 79% | 2972 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 49,429 psi | 77% | 2953 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,014 psi | 60% | 2703 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 94% | 40,393 psi | 63% | 2907 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 42,873 psi | 67% | 2874 fps | 97.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,470 psi | 43% | 1716 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,982 psi | 83% | 2946 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,872 psi | 64% | 2746 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,659 psi | 73% | 2851 fps | 98.1% |
| IMR 4831 | <<locked>> | 80% | 40,089 psi | 63% | 2756 fps | 99% |
| IMR 4955 Enduron | <<locked>> | 90% | 48,675 psi | 76% | 2904 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 94% | 48,225 psi | 76% | 3002 fps | 96% |
| Lovex S062 | <<locked>> | 80% | 53,287 psi | 84% | 2940 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,164 psi | 69% | 2799 fps | 98.7% |
| Lovex S070 | <<locked>> | 80% | 42,612 psi | 67% | 2782 fps | 97.5% |
| Lovex S071 | <<locked>> | 86% | 32,619 psi | 51% | 2569 fps | 95% |
| Norma 203B | <<locked>> | 80% | 53,983 psi | 85% | 2995 fps | 100% |
| Norma 204 | <<locked>> | 82% | 43,468 psi | 68% | 2838 fps | 95.7% |
| Norma MRP | 63.8 gr | 84% | 37,318 psi | 58% | 2785 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 41,466 psi | 65% | 2802 fps | 99.1% |
| Ramshot Grand | <<locked>> | 92% | 45,005 psi | 71% | 2946 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 40,277 psi | 63% | 2789 fps | 97.5% |
| Ramshot Magnum | <<locked>> | 92% | 40,205 psi | 63% | 2815 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,079 psi | 44% | 1759 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,098 psi | 82% | 2953 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,342 psi | 77% | 3005 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,901 psi | 66% | 2828 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,292 psi | 63% | 2838 fps | 98.6% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 37,173 psi | 58% | 2815 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 49,066 psi | 77% | 2897 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 44,585 psi | 70% | 2831 fps | 95% |
| Rottweil R 905 | <<locked>> | 86% | 42,119 psi | 66% | 2828 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 45,266 psi | 71% | 2822 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,164 psi | 69% | 2799 fps | 98.7% |
| Shooters World Precision | <<locked>> | 80% | 53,287 psi | 84% | 2940 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,612 psi | 67% | 2782 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,241 psi | 79% | 2953 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,472 psi | 78% | 2782 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,279 psi | 68% | 2740 fps | 97.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 41,756 psi | 65% | 2822 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 48,921 psi | 77% | 2890 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 48,718 psi | 76% | 2881 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 38,159 psi | 60% | 2756 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 37,449 psi | 59% | 2690 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 46,949 psi | 74% | 2818 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,859 psi | 67% | 2799 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 88% | 39,479 psi | 62% | 2730 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 53,998 psi | 85% | 2917 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 42,322 psi | 66% | 2799 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 33,518 psi | 53% | 2644 fps | 97.7% |
| Vihtavuori N560 | <<locked>> | 92% | 49,719 psi | 78% | 3038 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 96% | 46,035 psi | 72% | 2949 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,858 psi | 66% | 2762 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,932 psi | 69% | 2861 fps | 97.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,527 psi | 42% | 2539 fps | 96.9% |
| Winchester Supreme 780 | <<locked>> | 88% | 42,148 psi | 66% | 2792 fps | 95.5% |
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 87 powders for 7 mm Weath. Mag. loaded with the .283 | 140gr | Rhino Penetrator. Winchester StaBALL HD delivers the highest muzzle velocity at 3,209 fps; across all powders the maximum-charge window runs from 1,919 fps to 3,209 fps. ADI AR 2217 gives the best case fill at 100 %, and 87 of the 87 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.283" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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. Alliant Reloder-26, Accurate High Country, Norma MRP rank at the top here: for 7 mm Weath. Mag. with the .283 | 140gr | Rhino Penetrator they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Baschieri & Pellagri 109, Norma 217, ReloadSwiss RS 80 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.