Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 140gr | Frontier BTSP bullet and 86 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% | 56,608 psi | 89% | 2986 fps | 99.1% |
| Accurate 3100 | <<locked>> | 98% | 56,188 psi | 88% | 3041 fps | 99.8% |
| Accurate 4064 | <<locked>> | 82% | 56,463 psi | 88% | 2969 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 53,954 psi | 85% | 3028 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 57,406 psi | 90% | 3192 fps | 98.1% |
| Accurate MAGPRO | <<locked>> | 96% | 54,607 psi | 86% | 3127 fps | 96.3% |
| ADI AR 2208 | <<locked>> | 84% | 55,898 psi | 88% | 2999 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,027 psi | 86% | 3081 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 98% | 56,231 psi | 88% | 3133 fps | 97.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,943 psi | 61% | 2828 fps | 96.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,072 psi | 89% | 3025 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,305 psi | 90% | 3051 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,810 psi | 86% | 3091 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,043 psi | 88% | 3110 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,346 psi | 85% | 3064 fps | 98.3% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,695 psi | 87% | 3130 fps | 98.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,478 psi | 89% | 3107 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,936 psi | 77% | 3041 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 57,261 psi | 90% | 3205 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,592 psi | 86% | 3107 fps | 98.4% |
| Bofors RP3 | <<locked>> | 82% | 54,491 psi | 85% | 2989 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 55,695 psi | 87% | 3130 fps | 98.7% |
| Bofors RP7 | <<locked>> | 88% | 57,261 psi | 90% | 3035 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,414 psi | 76% | 2979 fps | 96.7% |
| Hodgdon H380 | <<locked>> | 82% | 54,592 psi | 86% | 3005 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,043 psi | 88% | 3084 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 86% | 55,419 psi | 87% | 3041 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 96% | 56,347 psi | 88% | 3071 fps | 96.9% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,274 psi | 87% | 3054 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,274 psi | 87% | 3012 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,993 psi | 75% | 3087 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 88% | 56,550 psi | 89% | 3123 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,651 psi | 57% | 1913 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,303 psi | 87% | 2982 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,725 psi | 90% | 3022 fps | 99.6% |
| IMR 4350 | <<locked>> | 90% | 54,969 psi | 86% | 3012 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,317 psi | 87% | 3005 fps | 99.3% |
| IMR 4831 | <<locked>> | 90% | 54,375 psi | 85% | 3022 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,302 psi | 85% | 3002 fps | 96.7% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,667 psi | 90% | 3169 fps | 97.9% |
| Lovex S062 | <<locked>> | 82% | 55,854 psi | 88% | 2976 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,709 psi | 87% | 3002 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 57,232 psi | 90% | 3048 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,850 psi | 78% | 2940 fps | 99.3% |
| Norma 203B | <<locked>> | 82% | 56,594 psi | 89% | 3035 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,999 psi | 88% | 3068 fps | 98.4% |
| Norma MRP | <<locked>> | 96% | 55,477 psi | 87% | 3153 fps | 99.5% |
| Norma URP | <<locked>> | 90% | 56,304 psi | 88% | 3071 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 57,609 psi | 90% | 3061 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,360 psi | 85% | 3123 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 90% | 55,216 psi | 87% | 3071 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,402 psi | 82% | 3054 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,449 psi | 59% | 1955 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,447 psi | 85% | 2989 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,419 psi | 87% | 3100 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 57,740 psi | 90% | 3110 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,231 psi | 88% | 3143 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,196 psi | 76% | 3081 fps | 99% |
| Rottweil R 902 | <<locked>> | 82% | 57,740 psi | 90% | 2989 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 54,607 psi | 86% | 2986 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,478 psi | 89% | 3048 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 96% | 57,377 psi | 90% | 3110 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 88% | 57,261 psi | 90% | 3035 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,709 psi | 87% | 3002 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 55,854 psi | 88% | 2976 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,232 psi | 90% | 3048 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,144 psi | 88% | 3045 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,071 psi | 86% | 2864 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,158 psi | 86% | 2953 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,898 psi | 89% | 3107 fps | 98.8% |
| Somchem S355 | <<locked>> | 84% | 54,549 psi | 85% | 2982 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,621 psi | 86% | 2979 fps | 96.6% |
| Somchem S365 | <<locked>> | 92% | 56,043 psi | 88% | 3071 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,244 psi | 85% | 3022 fps | 99% |
| Vihtavuori N150 | <<locked>> | 86% | 55,666 psi | 87% | 2953 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,491 psi | 85% | 3009 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,479 psi | 90% | 3058 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 82% | 56,405 psi | 88% | 2953 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,522 psi | 90% | 3068 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,361 psi | 87% | 3084 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,535 psi | 87% | 3143 fps | 97.1% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,184 psi | 80% | 3048 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,128 psi | 85% | 2969 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,043 psi | 88% | 3084 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,982 psi | 83% | 3186 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,302 psi | 85% | 3015 fps | 98.2% |
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% | 52,982 psi | 83% | 2927 fps | 98.6% |
| Accurate 3100 | <<locked>> | 84% | 34,809 psi | 55% | 2625 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 53,011 psi | 83% | 2917 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,959 psi | 64% | 2789 fps | 99% |
| Accurate High Country | <<locked>> | 90% | 46,644 psi | 73% | 2992 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 94% | 50,647 psi | 79% | 3054 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 49,559 psi | 78% | 2894 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 42,163 psi | 66% | 2831 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 92% | 45,977 psi | 72% | 2936 fps | 95% |
| ADI AR 2225 | <<locked>> | 98% | 36,419 psi | 57% | 2759 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,328 psi | 79% | 2920 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,577 psi | 84% | 2992 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,450 psi | 62% | 2795 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,223 psi | 71% | 2927 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 41,901 psi | 66% | 2822 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 90% | 42,641 psi | 67% | 2881 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,225 psi | 46% | 2539 fps | 97.3% |
| Alliant Reloder-25 | <<locked>> | 88% | 33,156 psi | 52% | 2671 fps | 95.8% |
| Alliant Reloder-26 | 61.3 gr | 80% | 31,459 psi | 49% | 2657 fps | 95.8% |
| Bofors RP15 | <<locked>> | 92% | 42,061 psi | 66% | 2864 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 51,126 psi | 80% | 2936 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 42,641 psi | 67% | 2881 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 44,527 psi | 70% | 2802 fps | 97.2% |
| Hodgdon H1000 | <<locked>> | 98% | 45,295 psi | 71% | 2913 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 51,242 psi | 80% | 2946 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 42,815 psi | 67% | 2838 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 80% | 45,687 psi | 72% | 2861 fps | 96.8% |
| Hodgdon H4831 | <<locked>> | 92% | 49,153 psi | 77% | 2946 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 92% | 48,254 psi | 76% | 2927 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,202 psi | 58% | 2684 fps | 99.4% |
| Hodgdon Retumbo | <<locked>> | 94% | 39,407 psi | 62% | 2881 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 41,814 psi | 66% | 2848 fps | 96.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,412 psi | 43% | 1709 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,141 psi | 82% | 2930 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 54,259 psi | 85% | 2966 fps | 99.3% |
| IMR 4350 | <<locked>> | 80% | 40,001 psi | 63% | 2723 fps | 95.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,963 psi | 72% | 2835 fps | 97.9% |
| IMR 4831 | <<locked>> | 80% | 39,334 psi | 62% | 2740 fps | 98.8% |
| IMR 4955 Enduron | <<locked>> | 90% | 47,747 psi | 75% | 2881 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 94% | 47,036 psi | 74% | 2972 fps | 95.4% |
| Lovex S062 | <<locked>> | 80% | 52,431 psi | 82% | 2927 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,468 psi | 68% | 2779 fps | 98.5% |
| Lovex S070 | <<locked>> | 80% | 41,684 psi | 65% | 2762 fps | 97.2% |
| Lovex S071 | <<locked>> | 88% | 33,837 psi | 53% | 2602 fps | 95.4% |
| Norma 203B | <<locked>> | 80% | 52,939 psi | 83% | 2976 fps | 100% |
| Norma 204 | <<locked>> | 82% | 42,598 psi | 67% | 2815 fps | 95.3% |
| Norma MRP | 62.5 gr | 84% | 36,376 psi | 57% | 2759 fps | 95% |
| Norma URP | <<locked>> | 80% | 40,495 psi | 63% | 2779 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 80% | 53,853 psi | 84% | 3005 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 46,920 psi | 74% | 2982 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 39,378 psi | 62% | 2766 fps | 97.2% |
| Ramshot Magnum | <<locked>> | 92% | 39,001 psi | 61% | 2785 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,007 psi | 44% | 1752 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,952 psi | 80% | 2930 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,008 psi | 75% | 2982 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,944 psi | 64% | 2812 fps | 98.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,465 psi | 62% | 2818 fps | 98.3% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 38,856 psi | 61% | 2861 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 80% | 54,215 psi | 85% | 2936 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,964 psi | 75% | 2877 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 46,659 psi | 73% | 2871 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 86% | 41,060 psi | 64% | 2805 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 44,527 psi | 70% | 2802 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,468 psi | 68% | 2779 fps | 98.5% |
| Shooters World Precision | <<locked>> | 80% | 52,431 psi | 82% | 2927 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,684 psi | 65% | 2762 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,269 psi | 77% | 2933 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,646 psi | 76% | 2769 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,583 psi | 67% | 2723 fps | 97.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 40,698 psi | 64% | 2795 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 48,095 psi | 75% | 2874 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 51,126 psi | 80% | 2920 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 37,101 psi | 58% | 2736 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 39,030 psi | 61% | 2726 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 45,963 psi | 72% | 2799 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,872 psi | 66% | 2779 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 90% | 41,307 psi | 65% | 2769 fps | 95.9% |
| Vihtavuori N540 | <<locked>> | 80% | 53,040 psi | 83% | 2904 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,423 psi | 65% | 2779 fps | 98.9% |
| Vihtavuori N555 | <<locked>> | 80% | 32,547 psi | 51% | 2618 fps | 97.3% |
| Vihtavuori N560 | 68.4 gr | 92% | 48,283 psi | 76% | 3012 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 98% | 47,906 psi | 75% | 2986 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,046 psi | 64% | 2746 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,989 psi | 67% | 2841 fps | 97.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,889 psi | 41% | 2513 fps | 96.3% |
| Winchester Supreme 780 | <<locked>> | 88% | 41,147 psi | 64% | 2769 fps | 95.1% |
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 86 powders for 7 mm Weath. Mag. loaded with the .284 | 140gr | Frontier BTSP. Alliant Reloder-26 delivers the highest muzzle velocity at 3,205 fps; across all powders the maximum-charge window runs from 1,913 fps to 3,205 fps. ADI AR 2225 gives the best case fill at 100 %, and 86 of the 86 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 140.0 gr projectile in 0.284" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-23, 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, Alliant Reloder-26 rank at the top here: for 7 mm Weath. Mag. with the .284 | 140gr | Frontier BTSP 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.