Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 140gr | Speer TBBC bullet and 77 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.
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 3100 | <<locked>> | 96% | 55,317 psi | 87% | 3035 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 56,695 psi | 89% | 3077 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 56,579 psi | 89% | 3182 fps | 98.1% |
| Accurate MAGPRO | <<locked>> | 94% | 53,751 psi | 84% | 3117 fps | 96.3% |
| ADI AR 2208 | <<locked>> | 82% | 54,723 psi | 86% | 2989 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 57,551 psi | 90% | 3127 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 96% | 55,390 psi | 87% | 3127 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,133 psi | 64% | 2890 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,912 psi | 88% | 3012 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 57,595 psi | 90% | 3136 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,984 psi | 86% | 3094 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,072 psi | 89% | 3117 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,143 psi | 86% | 3123 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,057 psi | 88% | 3100 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,880 psi | 81% | 3100 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 56,492 psi | 89% | 3192 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,070 psi | 85% | 3104 fps | 98.5% |
| Bofors RP3 | <<locked>> | 82% | 56,840 psi | 89% | 3028 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,776 psi | 75% | 3015 fps | 96.7% |
| Bofors RP5 | <<locked>> | 96% | 55,143 psi | 86% | 3123 fps | 98.8% |
| Bofors RP7 | <<locked>> | 86% | 56,028 psi | 88% | 3025 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,010 psi | 80% | 3041 fps | 97.7% |
| Hodgdon H380 | <<locked>> | 82% | 56,985 psi | 89% | 3048 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 54,853 psi | 86% | 3071 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 86% | 57,609 psi | 90% | 3087 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 94% | 55,317 psi | 87% | 3064 fps | 97% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,346 psi | 85% | 3048 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,157 psi | 85% | 2999 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,749 psi | 80% | 3153 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 86% | 55,274 psi | 87% | 3107 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,869 psi | 58% | 1932 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 57,595 psi | 90% | 3025 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,450 psi | 90% | 3061 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,450 psi | 90% | 3048 fps | 99.6% |
| IMR 4831 | <<locked>> | 90% | 57,159 psi | 90% | 3068 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,478 psi | 89% | 3051 fps | 97.4% |
| IMR 7828 SSC | <<locked>> | 98% | 56,782 psi | 89% | 3163 fps | 98% |
| Lovex S065 | <<locked>> | 86% | 54,331 psi | 85% | 2989 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 55,941 psi | 88% | 3035 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,634 psi | 82% | 2989 fps | 99.7% |
| Norma 204 | <<locked>> | 88% | 54,766 psi | 86% | 3058 fps | 98.4% |
| Norma MRP | <<locked>> | 94% | 54,752 psi | 86% | 3143 fps | 99.5% |
| Norma URP | <<locked>> | 88% | 55,201 psi | 87% | 3058 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 57,595 psi | 90% | 3186 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 88% | 54,172 psi | 85% | 3061 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,854 psi | 88% | 3117 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,666 psi | 59% | 1975 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,652 psi | 89% | 3035 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,302 psi | 85% | 3081 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,898 psi | 89% | 3100 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,056 psi | 86% | 3127 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,198 psi | 80% | 3146 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 84% | 57,174 psi | 90% | 3028 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,216 psi | 87% | 3035 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 94% | 56,565 psi | 89% | 3104 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 86% | 56,028 psi | 88% | 3025 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,331 psi | 85% | 2989 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 88% | 55,941 psi | 88% | 3035 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,085 psi | 86% | 3035 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,276 psi | 90% | 2900 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 57,450 psi | 90% | 2999 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,130 psi | 88% | 3097 fps | 98.9% |
| Somchem S355 | <<locked>> | 84% | 56,782 psi | 89% | 3022 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,101 psi | 89% | 3028 fps | 97.3% |
| Somchem S365 | <<locked>> | 90% | 55,434 psi | 87% | 3064 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,188 psi | 90% | 3077 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 84% | 54,578 psi | 86% | 2943 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 57,043 psi | 89% | 3051 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,608 psi | 89% | 3051 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 88% | 56,391 psi | 88% | 3058 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,723 psi | 86% | 3074 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,694 psi | 86% | 3136 fps | 97.2% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,447 psi | 85% | 3107 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,753 psi | 89% | 3012 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,100 psi | 86% | 3074 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 57,276 psi | 90% | 3238 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,174 psi | 90% | 3071 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>> | 82% | 34,403 psi | 54% | 2618 fps | 95.9% |
| Accurate 4350 | <<locked>> | 80% | 43,236 psi | 68% | 2838 fps | 99.5% |
| Accurate High Country | <<locked>> | 88% | 45,963 psi | 72% | 2982 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 92% | 50,038 psi | 78% | 3048 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 51,285 psi | 80% | 2933 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 41,278 psi | 65% | 2815 fps | 95.3% |
| ADI AR 2213 | 67.7 gr | 90% | 45,020 psi | 71% | 2927 fps | 95% |
| ADI AR 2225 | <<locked>> | 96% | 36,129 psi | 57% | 2759 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,402 psi | 82% | 2959 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,365 psi | 65% | 2841 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,761 psi | 75% | 2976 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 41,133 psi | 64% | 2808 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 88% | 41,901 psi | 66% | 2867 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,777 psi | 48% | 2585 fps | 98.1% |
| Alliant Reloder-25 | <<locked>> | 86% | 32,735 psi | 51% | 2661 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,301 psi | 52% | 2713 fps | 96.9% |
| Bofors RP15 | <<locked>> | 90% | 41,553 psi | 65% | 2858 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 53,229 psi | 83% | 2972 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 44,599 psi | 70% | 2953 fps | 95.8% |
| Bofors RP5 | <<locked>> | 88% | 41,901 psi | 66% | 2867 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 46,340 psi | 73% | 2848 fps | 97.8% |
| Hodgdon H1000 | <<locked>> | 96% | 44,454 psi | 70% | 2904 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 53,417 psi | 84% | 2992 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,860 psi | 70% | 2887 fps | 98% |
| Hodgdon H4350 | <<locked>> | 80% | 47,500 psi | 74% | 2907 fps | 97.5% |
| Hodgdon H4831 | <<locked>> | 90% | 48,327 psi | 76% | 2936 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 90% | 47,239 psi | 74% | 2917 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,972 psi | 61% | 2726 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 92% | 38,914 psi | 61% | 2874 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 44,092 psi | 69% | 2900 fps | 97.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,630 psi | 43% | 1729 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,983 psi | 85% | 2966 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,713 psi | 65% | 2766 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,718 psi | 75% | 2877 fps | 98.5% |
| IMR 4831 | <<locked>> | 80% | 41,220 psi | 65% | 2782 fps | 99.2% |
| IMR 4955 Enduron | <<locked>> | 88% | 46,847 psi | 73% | 2874 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 92% | 46,267 psi | 73% | 2966 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 45,252 psi | 71% | 2825 fps | 99% |
| Lovex S070 | <<locked>> | 80% | 43,453 psi | 68% | 2805 fps | 97.9% |
| Lovex S071 | <<locked>> | 86% | 33,620 psi | 53% | 2598 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 41,568 psi | 65% | 2799 fps | 95.3% |
| Norma MRP | 63.7 gr | 82% | 35,766 psi | 56% | 2746 fps | 95% |
| Norma URP | <<locked>> | 80% | 42,453 psi | 67% | 2825 fps | 99.3% |
| Ramshot Grand | <<locked>> | 92% | 46,282 psi | 73% | 2976 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 41,321 psi | 65% | 2812 fps | 97.9% |
| Ramshot Magnum | <<locked>> | 90% | 38,406 psi | 60% | 2776 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,224 psi | 44% | 1768 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,142 psi | 83% | 2976 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,647 psi | 79% | 3025 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,989 psi | 67% | 2854 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,466 psi | 65% | 2867 fps | 99% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 38,319 psi | 60% | 2854 fps | 96.3% |
| Rottweil R 903 | <<locked>> | 80% | 50,125 psi | 79% | 2917 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 45,542 psi | 71% | 2854 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 84% | 40,495 psi | 63% | 2795 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 46,340 psi | 73% | 2848 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,252 psi | 71% | 2825 fps | 99% |
| Shooters World SW4350 | <<locked>> | 80% | 43,453 psi | 68% | 2805 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,401 psi | 81% | 2976 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,444 psi | 79% | 2802 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,266 psi | 69% | 2766 fps | 97.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 40,147 psi | 63% | 2789 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 50,125 psi | 79% | 2913 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 49,908 psi | 78% | 2907 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 39,204 psi | 61% | 2779 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 38,406 psi | 60% | 2717 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 47,877 psi | 75% | 2838 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,976 psi | 69% | 2825 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 86% | 37,898 psi | 59% | 2697 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 43,395 psi | 68% | 2825 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 80% | 34,447 psi | 54% | 2667 fps | 98.1% |
| Vihtavuori N560 | 69.9 gr | 90% | 47,601 psi | 75% | 2999 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 96% | 47,355 psi | 74% | 2976 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,960 psi | 67% | 2785 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,034 psi | 71% | 2887 fps | 98% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,282 psi | 43% | 2572 fps | 97.6% |
| Winchester Supreme 780 | <<locked>> | 86% | 40,350 psi | 63% | 2756 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 77 powders for 7 mm Weath. Mag. loaded with the .284 | 140gr | Speer TBBC. Winchester StaBALL HD delivers the highest muzzle velocity at 3,238 fps; across all powders the maximum-charge window runs from 1,932 fps to 3,238 fps. ADI AR 2225 gives the best case fill at 100 %, and 77 of the 77 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 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-25, Bofors RP30 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 | Speer TBBC 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.