Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 139gr | Hornady SP bullet and 78 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% | 54,882 psi | 86% | 3035 fps | 99.8% |
| Accurate 4350 | <<locked>> | 88% | 56,318 psi | 88% | 3081 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 57,319 psi | 90% | 3186 fps | 97% |
| ADI AR 2208 | <<locked>> | 84% | 57,682 psi | 90% | 3045 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 57,130 psi | 90% | 3130 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 96% | 54,984 psi | 86% | 3127 fps | 97.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,828 psi | 64% | 2890 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,521 psi | 87% | 3018 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 57,174 psi | 90% | 3140 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,563 psi | 86% | 3097 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 56,666 psi | 89% | 3120 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,708 psi | 86% | 3123 fps | 98.6% |
| Alliant Reloder-23 | <<locked>> | 98% | 55,622 psi | 87% | 3104 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,459 psi | 81% | 3097 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 55,985 psi | 88% | 3192 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 57,392 psi | 90% | 3166 fps | 98.9% |
| Bofors RP3 | <<locked>> | 82% | 56,420 psi | 88% | 3031 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,355 psi | 74% | 3015 fps | 96.5% |
| Bofors RP5 | <<locked>> | 96% | 54,708 psi | 86% | 3123 fps | 98.6% |
| Bofors RP7 | <<locked>> | 86% | 55,651 psi | 87% | 3025 fps | 99.2% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,633 psi | 79% | 3038 fps | 97.5% |
| Hodgdon H380 | <<locked>> | 82% | 56,652 psi | 89% | 3054 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 54,447 psi | 85% | 3071 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 86% | 57,276 psi | 90% | 3091 fps | 99% |
| Hodgdon H4831 | <<locked>> | 94% | 54,926 psi | 86% | 3064 fps | 96.8% |
| Hodgdon H4831 SC | <<locked>> | 96% | 57,696 psi | 90% | 3110 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 57,493 psi | 90% | 3058 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,343 psi | 79% | 3150 fps | 98.7% |
| Hodgdon Superformance | <<locked>> | 86% | 54,839 psi | 86% | 3110 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,912 psi | 58% | 1939 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 57,203 psi | 90% | 3028 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,072 psi | 89% | 3064 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,087 psi | 89% | 3051 fps | 99.6% |
| IMR 4831 | <<locked>> | 90% | 56,739 psi | 89% | 3071 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,115 psi | 88% | 3051 fps | 97.3% |
| IMR 7828 SSC | <<locked>> | 98% | 56,362 psi | 88% | 3166 fps | 97.9% |
| Lovex S062 | <<locked>> | 82% | 57,566 psi | 90% | 3018 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 57,508 psi | 90% | 3048 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 55,579 psi | 87% | 3038 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,214 psi | 82% | 2992 fps | 99.6% |
| Norma 204 | <<locked>> | 88% | 54,375 psi | 85% | 3058 fps | 98.3% |
| Norma MRP | <<locked>> | 94% | 54,259 psi | 85% | 3143 fps | 99.4% |
| Norma URP | <<locked>> | 88% | 54,781 psi | 86% | 3061 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 57,130 psi | 90% | 3189 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 90% | 57,363 psi | 90% | 3120 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,390 psi | 87% | 3117 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,507 psi | 59% | 1978 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,289 psi | 88% | 3035 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,099 psi | 85% | 3091 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,463 psi | 88% | 3104 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,621 psi | 86% | 3130 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 50,763 psi | 80% | 3146 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 84% | 56,753 psi | 89% | 3031 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,839 psi | 86% | 3038 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 94% | 56,159 psi | 88% | 3107 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 86% | 55,651 psi | 87% | 3025 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 57,508 psi | 90% | 3048 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 57,566 psi | 90% | 3018 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 55,579 psi | 87% | 3038 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,694 psi | 86% | 3038 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,913 psi | 89% | 2907 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 57,087 psi | 89% | 3002 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 55,709 psi | 87% | 3100 fps | 98.7% |
| Somchem S355 | <<locked>> | 84% | 56,434 psi | 88% | 3025 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 56,724 psi | 89% | 3031 fps | 97.2% |
| Somchem S365 | <<locked>> | 90% | 55,027 psi | 86% | 3068 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 56,782 psi | 89% | 3081 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 84% | 54,244 psi | 85% | 2946 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 56,637 psi | 89% | 3054 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,202 psi | 88% | 3054 fps | 99.1% |
| Vihtavuori N550 | <<locked>> | 88% | 56,043 psi | 88% | 3061 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,273 psi | 85% | 3077 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,259 psi | 85% | 3133 fps | 97% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 53,983 psi | 85% | 3110 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,362 psi | 88% | 3012 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,694 psi | 86% | 3077 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 56,739 psi | 89% | 3241 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 56,753 psi | 89% | 3074 fps | 98.7% |
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 3100 | <<locked>> | 82% | 34,084 psi | 53% | 2618 fps | 95.7% |
| Accurate 4350 | <<locked>> | 80% | 42,873 psi | 67% | 2841 fps | 99.4% |
| Accurate MAGPRO | <<locked>> | 92% | 49,617 psi | 78% | 3048 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 50,966 psi | 80% | 2933 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 40,959 psi | 64% | 2815 fps | 95.1% |
| ADI AR 2213 | 69.2 gr | 92% | 48,022 psi | 75% | 2995 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 96% | 35,853 psi | 56% | 2759 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,054 psi | 82% | 2963 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,017 psi | 64% | 2844 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,340 psi | 74% | 2979 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 40,959 psi | 64% | 2812 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 88% | 41,582 psi | 65% | 2864 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,530 psi | 48% | 2589 fps | 97.9% |
| Alliant Reloder-25 | <<locked>> | 86% | 32,460 psi | 51% | 2657 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,156 psi | 52% | 2717 fps | 96.7% |
| Bofors RP15 | <<locked>> | 90% | 41,191 psi | 65% | 2858 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 52,823 psi | 83% | 2976 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 44,208 psi | 69% | 2953 fps | 95.6% |
| Bofors RP5 | <<locked>> | 88% | 41,582 psi | 65% | 2864 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 46,021 psi | 72% | 2851 fps | 97.7% |
| Hodgdon H1000 | <<locked>> | 96% | 44,121 psi | 69% | 2904 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 53,040 psi | 83% | 2995 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,498 psi | 70% | 2887 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 80% | 47,166 psi | 74% | 2907 fps | 97.3% |
| Hodgdon H4831 | <<locked>> | 90% | 47,964 psi | 75% | 2936 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 92% | 50,386 psi | 79% | 2982 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,638 psi | 61% | 2730 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 94% | 41,205 psi | 65% | 2943 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 43,932 psi | 69% | 2907 fps | 97.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,470 psi | 43% | 1729 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,635 psi | 84% | 2972 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,568 psi | 65% | 2772 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,384 psi | 74% | 2881 fps | 98.3% |
| IMR 4831 | <<locked>> | 80% | 40,872 psi | 64% | 2785 fps | 99.1% |
| IMR 4955 Enduron | <<locked>> | 88% | 46,572 psi | 73% | 2874 fps | 95% |
| IMR 7828 SSC | <<locked>> | 92% | 45,905 psi | 72% | 2966 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 54,201 psi | 85% | 2969 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,962 psi | 70% | 2828 fps | 98.9% |
| Lovex S070 | <<locked>> | 80% | 43,178 psi | 68% | 2808 fps | 97.7% |
| Lovex S071 | <<locked>> | 86% | 33,301 psi | 52% | 2595 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 41,278 psi | 65% | 2802 fps | 95.1% |
| Norma MRP | 65.2 gr | 84% | 38,116 psi | 60% | 2815 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 42,090 psi | 66% | 2828 fps | 99.2% |
| Ramshot Grand | <<locked>> | 92% | 45,905 psi | 72% | 2976 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 40,973 psi | 64% | 2815 fps | 97.7% |
| Ramshot Magnum | <<locked>> | 90% | 38,072 psi | 60% | 2772 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,065 psi | 44% | 1772 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,837 psi | 83% | 2979 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,212 psi | 79% | 3028 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,656 psi | 67% | 2854 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,118 psi | 64% | 2871 fps | 98.8% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 38,000 psi | 60% | 2851 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 49,734 psi | 78% | 2920 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 45,208 psi | 71% | 2858 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 84% | 40,176 psi | 63% | 2795 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 46,021 psi | 72% | 2851 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,962 psi | 70% | 2828 fps | 98.9% |
| Shooters World Precision | <<locked>> | 80% | 54,201 psi | 85% | 2969 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 43,178 psi | 68% | 2808 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,068 psi | 80% | 2979 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,343 psi | 79% | 2812 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,947 psi | 69% | 2769 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 42,627 psi | 67% | 2854 fps | 95.9% |
| Somchem S355 | <<locked>> | 80% | 49,777 psi | 78% | 2917 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 49,574 psi | 78% | 2910 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 39,001 psi | 61% | 2785 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 38,116 psi | 60% | 2717 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 47,543 psi | 75% | 2841 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,613 psi | 68% | 2828 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 88% | 40,248 psi | 63% | 2756 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 43,091 psi | 68% | 2828 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 80% | 34,142 psi | 54% | 2671 fps | 97.9% |
| Vihtavuori N560 | 69.8 gr | 90% | 47,210 psi | 74% | 2999 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 96% | 46,963 psi | 74% | 2979 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,627 psi | 67% | 2789 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,672 psi | 70% | 2890 fps | 97.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,021 psi | 42% | 2569 fps | 97.3% |
| Winchester Supreme 780 | <<locked>> | 88% | 42,888 psi | 67% | 2822 fps | 95.8% |
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 | 139gr | Hornady SP. Winchester StaBALL HD delivers the highest muzzle velocity at 3,241 fps; across all powders the maximum-charge window runs from 1,939 fps to 3,241 fps. ADI AR 2217 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 139.0 gr projectile in 0.284" calls for a 1:12.0 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 | 139gr | Hornady SP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Baschieri & Pellagri 109, IMR 8133 Enduron, Norma 217 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.