Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 140gr | Sierra Pro-Hunter bullet and 76 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 ADI AR 2213.
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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 55,695 psi | 87% | 3041 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 57,130 psi | 90% | 3084 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 57,174 psi | 90% | 3196 fps | 98.3% |
| Accurate MAGPRO | <<locked>> | 94% | 54,288 psi | 85% | 3127 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 82% | 54,853 psi | 86% | 2992 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,143 psi | 85% | 3074 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 96% | 55,738 psi | 87% | 3133 fps | 97.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,394 psi | 65% | 2897 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,072 psi | 88% | 3015 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,259 psi | 85% | 3084 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,405 psi | 87% | 3104 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,377 psi | 90% | 3123 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,477 psi | 87% | 3130 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,420 psi | 88% | 3107 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,170 psi | 82% | 3104 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 57,101 psi | 89% | 3199 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,404 psi | 85% | 3110 fps | 98.6% |
| Bofors RP3 | <<locked>> | 82% | 57,246 psi | 90% | 3035 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,138 psi | 75% | 3025 fps | 96.8% |
| Bofors RP5 | <<locked>> | 96% | 55,477 psi | 87% | 3130 fps | 98.8% |
| Bofors RP7 | <<locked>> | 86% | 56,101 psi | 88% | 3025 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,242 psi | 80% | 3045 fps | 97.7% |
| Hodgdon H380 | <<locked>> | 82% | 57,377 psi | 90% | 3054 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 55,230 psi | 87% | 3077 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 84% | 54,447 psi | 85% | 3035 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 94% | 55,608 psi | 87% | 3068 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,636 psi | 86% | 3054 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,563 psi | 86% | 3009 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,053 psi | 80% | 3159 fps | 99% |
| Hodgdon Superformance | <<locked>> | 86% | 55,593 psi | 87% | 3114 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,796 psi | 58% | 1932 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,551 psi | 90% | 3064 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,580 psi | 90% | 3051 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 57,537 psi | 90% | 3074 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,768 psi | 89% | 3054 fps | 97.5% |
| IMR 7828 SSC | <<locked>> | 98% | 57,101 psi | 89% | 3169 fps | 98.1% |
| Lovex S065 | <<locked>> | 86% | 54,723 psi | 86% | 2999 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 56,304 psi | 88% | 3045 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,953 psi | 83% | 2999 fps | 99.7% |
| Norma 204 | <<locked>> | 88% | 55,114 psi | 86% | 3064 fps | 98.5% |
| Norma MRP | <<locked>> | 94% | 55,332 psi | 87% | 3153 fps | 99.6% |
| Norma URP | <<locked>> | 88% | 55,535 psi | 87% | 3064 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 53,911 psi | 84% | 3123 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 88% | 54,505 psi | 85% | 3068 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,434 psi | 88% | 3127 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,594 psi | 59% | 1978 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,985 psi | 89% | 3038 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,766 psi | 86% | 3087 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 57,261 psi | 90% | 3107 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,405 psi | 87% | 3133 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,677 psi | 81% | 3159 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 84% | 57,348 psi | 90% | 3031 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,535 psi | 87% | 3045 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 94% | 56,927 psi | 89% | 3110 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 56,101 psi | 88% | 3025 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,723 psi | 86% | 2999 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 88% | 56,304 psi | 88% | 3045 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,216 psi | 87% | 3038 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,406 psi | 90% | 2904 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,143 psi | 85% | 2946 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,463 psi | 88% | 3107 fps | 98.9% |
| Somchem S355 | <<locked>> | 84% | 57,188 psi | 90% | 3028 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,363 psi | 90% | 3038 fps | 97.4% |
| Somchem S365 | <<locked>> | 90% | 55,622 psi | 87% | 3068 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,493 psi | 90% | 3084 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 84% | 54,723 psi | 86% | 2946 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 57,406 psi | 90% | 3058 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,942 psi | 89% | 3058 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 88% | 56,739 psi | 89% | 3064 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 55,100 psi | 86% | 3081 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,274 psi | 87% | 3146 fps | 97.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,723 psi | 86% | 3114 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,058 psi | 89% | 3015 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,448 psi | 87% | 3084 fps | 99.6% |
| Winchester StaBALL HD | <<locked>> | 98% | 53,563 psi | 84% | 3186 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,725 psi | 90% | 3081 fps | 98.9% |
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 3100 | <<locked>> | 80% | 32,227 psi | 51% | 2562 fps | 95% |
| Accurate 4350 | <<locked>> | 80% | 43,424 psi | 68% | 2844 fps | 99.5% |
| Accurate High Country | <<locked>> | 88% | 46,311 psi | 73% | 2992 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 92% | 50,575 psi | 79% | 3058 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 51,677 psi | 81% | 2940 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 41,582 psi | 65% | 2825 fps | 95.4% |
| ADI AR 2213 | 68.1 gr | 90% | 45,310 psi | 71% | 2933 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 96% | 36,376 psi | 57% | 2766 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,591 psi | 82% | 2963 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,727 psi | 65% | 2854 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,138 psi | 75% | 2982 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 41,437 psi | 65% | 2815 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 88% | 42,235 psi | 66% | 2874 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,951 psi | 49% | 2592 fps | 98.2% |
| Alliant Reloder-25 | <<locked>> | 86% | 32,982 psi | 52% | 2671 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,620 psi | 53% | 2720 fps | 97% |
| Bofors RP15 | <<locked>> | 90% | 41,858 psi | 66% | 2864 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 53,606 psi | 84% | 2982 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 44,904 psi | 70% | 2959 fps | 95.9% |
| Bofors RP5 | <<locked>> | 88% | 42,235 psi | 66% | 2874 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 46,456 psi | 73% | 2851 fps | 97.9% |
| Hodgdon H1000 | <<locked>> | 96% | 44,730 psi | 70% | 2913 fps | 96% |
| Hodgdon H380 | <<locked>> | 80% | 53,563 psi | 84% | 2995 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 45,208 psi | 71% | 2890 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 80% | 47,848 psi | 75% | 2913 fps | 97.6% |
| Hodgdon H4831 | <<locked>> | 90% | 48,631 psi | 76% | 2943 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 90% | 47,543 psi | 75% | 2923 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,349 psi | 62% | 2733 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 39,175 psi | 61% | 2881 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 44,425 psi | 70% | 2907 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,601 psi | 43% | 1729 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,018 psi | 66% | 2776 fps | 96.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,863 psi | 75% | 2881 fps | 98.5% |
| IMR 4831 | <<locked>> | 80% | 41,379 psi | 65% | 2785 fps | 99.3% |
| IMR 4955 Enduron | <<locked>> | 88% | 47,152 psi | 74% | 2881 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 92% | 46,557 psi | 73% | 2972 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 45,411 psi | 71% | 2828 fps | 99.1% |
| Lovex S070 | <<locked>> | 80% | 43,787 psi | 69% | 2815 fps | 98% |
| Lovex S071 | <<locked>> | 86% | 33,765 psi | 53% | 2602 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 41,901 psi | 66% | 2805 fps | 95.4% |
| Norma MRP | 64.1 gr | 82% | 36,071 psi | 57% | 2756 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 42,801 psi | 67% | 2831 fps | 99.4% |
| Ramshot Grand | <<locked>> | 90% | 43,482 psi | 68% | 2917 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 41,655 psi | 65% | 2822 fps | 98% |
| Ramshot Magnum | <<locked>> | 90% | 38,827 psi | 61% | 2785 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,210 psi | 44% | 1772 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,287 psi | 84% | 2979 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,082 psi | 80% | 3031 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,381 psi | 68% | 2864 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,597 psi | 65% | 2871 fps | 99% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 35,955 psi | 56% | 2785 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 50,517 psi | 79% | 2927 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 45,861 psi | 72% | 2864 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 84% | 40,654 psi | 64% | 2799 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 46,456 psi | 73% | 2851 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,411 psi | 71% | 2828 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 80% | 43,787 psi | 69% | 2815 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,793 psi | 81% | 2982 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,850 psi | 80% | 2812 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,585 psi | 70% | 2772 fps | 98% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 40,292 psi | 63% | 2792 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 50,328 psi | 79% | 2920 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 46,949 psi | 74% | 2851 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 39,566 psi | 62% | 2789 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 38,711 psi | 61% | 2723 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 48,254 psi | 76% | 2841 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,135 psi | 69% | 2831 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 86% | 38,218 psi | 60% | 2703 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 43,555 psi | 68% | 2831 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 80% | 34,780 psi | 55% | 2677 fps | 98.2% |
| Vihtavuori N560 | 70.3 gr | 90% | 47,906 psi | 75% | 3005 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 96% | 47,877 psi | 75% | 2989 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,265 psi | 68% | 2792 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,411 psi | 71% | 2897 fps | 98.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,499 psi | 43% | 2582 fps | 97.8% |
| Winchester Supreme 780 | <<locked>> | 86% | 40,654 psi | 64% | 2766 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 83 powders for 7 mm Weath. Mag. loaded with the .284 | 140gr | Sierra Pro-Hunter. Alliant Reloder-26 delivers the highest muzzle velocity at 3,199 fps; across all powders the maximum-charge window runs from 1,932 fps to 3,199 fps. ADI AR 2217 gives the best case fill at 100 %, and 83 of the 83 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:12.5 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. Norma MRP, Vihtavuori N560, ADI AR 2213 rank at the top here: for 7 mm Weath. Mag. with the .284 | 140gr | Sierra Pro-Hunter they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Baschieri & Pellagri 109, IMR 8133 Enduron, 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.