Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 130gr | Speer Boat-Tail 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 2700 | <<locked>> | 82% | 57,537 psi | 90% | 3114 fps | 99% |
| Accurate 3100 | <<locked>> | 98% | 57,479 psi | 90% | 3166 fps | 99.8% |
| Accurate 4064 | <<locked>> | 82% | 57,319 psi | 90% | 3094 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 55,042 psi | 86% | 3156 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 54,839 psi | 86% | 3251 fps | 97.2% |
| Accurate MAGPRO | <<locked>> | 96% | 55,753 psi | 87% | 3248 fps | 96.1% |
| ADI AR 2208 | <<locked>> | 84% | 56,797 psi | 89% | 3130 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,941 psi | 88% | 3202 fps | 98.2% |
| ADI AR 2213 | <<locked>> | 98% | 57,609 psi | 90% | 3261 fps | 97.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,827 psi | 62% | 2940 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,375 psi | 85% | 3097 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,651 psi | 87% | 3215 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 57,232 psi | 90% | 3238 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,477 psi | 87% | 3189 fps | 98.2% |
| Alliant Reloder-22 | <<locked>> | 98% | 57,203 psi | 90% | 3258 fps | 98.6% |
| Alliant Reloder-23 | <<locked>> | 98% | 54,128 psi | 85% | 3176 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 50,212 psi | 79% | 3166 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 94% | 54,578 psi | 86% | 3264 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 55,825 psi | 87% | 3232 fps | 98.3% |
| Bofors RP3 | <<locked>> | 82% | 55,361 psi | 87% | 3114 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 57,203 psi | 90% | 3258 fps | 98.6% |
| Bofors RP7 | <<locked>> | 86% | 54,607 psi | 86% | 3100 fps | 98.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,414 psi | 77% | 3097 fps | 96.5% |
| Hodgdon H380 | <<locked>> | 82% | 55,506 psi | 87% | 3130 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 57,087 psi | 89% | 3212 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 86% | 56,246 psi | 88% | 3166 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 96% | 57,580 psi | 90% | 3199 fps | 96.8% |
| Hodgdon H4831 SC | <<locked>> | 96% | 56,362 psi | 88% | 3176 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 56,231 psi | 88% | 3136 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 49,095 psi | 77% | 3209 fps | 97.9% |
| Hodgdon Superformance | <<locked>> | 88% | 57,667 psi | 90% | 3248 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,637 psi | 57% | 2008 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,130 psi | 88% | 3107 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,970 psi | 88% | 3136 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,043 psi | 88% | 3127 fps | 99.2% |
| IMR 4831 | <<locked>> | 90% | 55,492 psi | 87% | 3146 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 55,100 psi | 86% | 3123 fps | 96.5% |
| IMR 7828 SSC | <<locked>> | 98% | 55,114 psi | 86% | 3235 fps | 97.1% |
| Lovex S062 | <<locked>> | 82% | 56,463 psi | 88% | 3100 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 56,594 psi | 89% | 3127 fps | 99.8% |
| Lovex S070 | <<locked>> | 88% | 54,607 psi | 86% | 3117 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,937 psi | 80% | 3061 fps | 99.3% |
| Norma 203B | <<locked>> | 82% | 57,246 psi | 90% | 3159 fps | 100% |
| Norma 204 | <<locked>> | 90% | 56,956 psi | 89% | 3192 fps | 98.3% |
| Norma MRP | <<locked>> | 96% | 56,913 psi | 89% | 3284 fps | 99.4% |
| Norma URP | <<locked>> | 90% | 57,276 psi | 90% | 3196 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 55,825 psi | 87% | 3255 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 90% | 56,188 psi | 88% | 3196 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,954 psi | 85% | 3179 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,391 psi | 59% | 2054 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,158 psi | 86% | 3110 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 56,623 psi | 89% | 3225 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 55,013 psi | 86% | 3176 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 57,290 psi | 90% | 3268 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,632 psi | 78% | 3209 fps | 99% |
| Rottweil R 903 | <<locked>> | 84% | 55,666 psi | 87% | 3114 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 57,479 psi | 90% | 3173 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 94% | 54,926 psi | 86% | 3176 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 86% | 54,607 psi | 86% | 3100 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 88% | 56,594 psi | 89% | 3127 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 56,463 psi | 88% | 3100 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 54,607 psi | 86% | 3117 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 57,290 psi | 90% | 3176 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,898 psi | 88% | 2989 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 56,072 psi | 88% | 3077 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,476 psi | 85% | 3173 fps | 98.1% |
| Somchem S355 | <<locked>> | 84% | 55,434 psi | 87% | 3107 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,709 psi | 87% | 3104 fps | 96.5% |
| Somchem S365 | <<locked>> | 92% | 57,348 psi | 90% | 3199 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 55,506 psi | 87% | 3150 fps | 98.9% |
| Vihtavuori N150 | <<locked>> | 86% | 56,710 psi | 89% | 3077 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 55,506 psi | 87% | 3133 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 55,013 psi | 86% | 3127 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 82% | 57,305 psi | 90% | 3077 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 54,839 psi | 86% | 3136 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 56,637 psi | 89% | 3209 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 56,855 psi | 89% | 3271 fps | 97% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,721 psi | 83% | 3176 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 55,158 psi | 86% | 3091 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 57,087 psi | 89% | 3212 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 54,926 psi | 86% | 3314 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 55,521 psi | 87% | 3143 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% | 53,824 psi | 84% | 3051 fps | 98.5% |
| Accurate 3100 | <<locked>> | 84% | 35,549 psi | 56% | 2733 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 53,795 psi | 84% | 3041 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,756 psi | 65% | 2904 fps | 98.9% |
| Accurate High Country | 71.7 gr | 90% | 47,558 psi | 75% | 3110 fps | 95.4% |
| Accurate MAGPRO | <<locked>> | 94% | 51,953 psi | 81% | 3179 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 50,082 psi | 78% | 3012 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 42,786 psi | 67% | 2943 fps | 95% |
| ADI AR 2213 | <<locked>> | 94% | 50,183 psi | 79% | 3127 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 98% | 37,420 psi | 59% | 2871 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,024 psi | 80% | 3041 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,132 psi | 63% | 2910 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,180 psi | 72% | 3048 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 42,743 psi | 67% | 2936 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 90% | 43,511 psi | 68% | 2992 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,747 psi | 47% | 2641 fps | 96.9% |
| Alliant Reloder-25 | <<locked>> | 88% | 33,736 psi | 53% | 2772 fps | 95.4% |
| Alliant Reloder-26 | 65.7 gr | 80% | 32,184 psi | 50% | 2762 fps | 95.4% |
| Bofors RP15 | <<locked>> | 92% | 42,917 psi | 67% | 2976 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 51,866 psi | 81% | 3054 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 43,511 psi | 68% | 2992 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 45,150 psi | 71% | 2920 fps | 97% |
| Hodgdon H1000 | <<locked>> | 98% | 46,209 psi | 72% | 3031 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 51,866 psi | 81% | 3068 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 43,555 psi | 68% | 2953 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 80% | 46,325 psi | 73% | 2976 fps | 96.5% |
| Hodgdon H4831 | <<locked>> | 92% | 50,227 psi | 79% | 3068 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 52,721 psi | 83% | 3114 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,768 psi | 59% | 2792 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 96% | 42,888 psi | 67% | 3064 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 42,656 psi | 67% | 2963 fps | 96.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,470 psi | 43% | 1798 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,707 psi | 83% | 3051 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,712 psi | 64% | 2835 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,514 psi | 73% | 2949 fps | 97.7% |
| IMR 4831 | <<locked>> | 80% | 39,885 psi | 63% | 2848 fps | 98.5% |
| IMR 4955 Enduron | <<locked>> | 92% | 51,764 psi | 81% | 3064 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 94% | 48,008 psi | 75% | 3094 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 53,011 psi | 83% | 3045 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,077 psi | 69% | 2897 fps | 98.4% |
| Lovex S070 | <<locked>> | 80% | 42,235 psi | 66% | 2871 fps | 96.9% |
| Lovex S071 | <<locked>> | 88% | 34,635 psi | 54% | 2710 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 53,751 psi | 84% | 3104 fps | 100% |
| Norma 204 | <<locked>> | 82% | 43,323 psi | 68% | 2930 fps | 95% |
| Norma MRP | 68.5 gr | 86% | 39,740 psi | 62% | 2936 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 41,118 psi | 64% | 2890 fps | 98.6% |
| Ramshot Grand | <<locked>> | 94% | 48,167 psi | 75% | 3107 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 40,074 psi | 63% | 2877 fps | 96.9% |
| Ramshot Magnum | <<locked>> | 92% | 40,045 psi | 63% | 2900 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,021 psi | 44% | 1841 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,837 psi | 81% | 3051 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,979 psi | 77% | 3107 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,611 psi | 65% | 2920 fps | 98.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,132 psi | 63% | 2930 fps | 98.1% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 39,958 psi | 63% | 2976 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 48,675 psi | 76% | 2995 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 47,398 psi | 74% | 2986 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 86% | 41,945 psi | 66% | 2920 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 45,150 psi | 71% | 2920 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,077 psi | 69% | 2897 fps | 98.4% |
| Shooters World Precision | <<locked>> | 80% | 53,011 psi | 83% | 3045 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,235 psi | 66% | 2871 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,053 psi | 78% | 3054 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,356 psi | 77% | 2887 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,062 psi | 67% | 2831 fps | 97.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 44,469 psi | 70% | 2979 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 48,805 psi | 76% | 2995 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 51,938 psi | 81% | 3035 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 37,913 psi | 59% | 2848 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 39,914 psi | 63% | 2841 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 46,572 psi | 73% | 2913 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,583 psi | 67% | 2894 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 90% | 41,989 psi | 66% | 2877 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 53,679 psi | 84% | 3022 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 42,018 psi | 66% | 2890 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 80% | 33,185 psi | 52% | 2726 fps | 97% |
| Vihtavuori N560 | <<locked>> | 92% | 49,400 psi | 77% | 3133 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 98% | 49,139 psi | 77% | 3107 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,829 psi | 66% | 2858 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 43,743 psi | 69% | 2956 fps | 97.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,382 psi | 41% | 2608 fps | 95.7% |
| Winchester Supreme 780 | <<locked>> | 90% | 44,962 psi | 70% | 2946 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 88 powders for 7 mm Weath. Mag. loaded with the .284 | 130gr | Speer Boat-Tail. Winchester StaBALL HD delivers the highest muzzle velocity at 3,314 fps; across all powders the maximum-charge window runs from 2,008 fps to 3,314 fps. ADI AR 2217 gives the best case fill at 100 %, and 88 of the 88 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 130.0 gr projectile in 0.284" calls for a 1:13.5 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 .284 | 130gr | Speer Boat-Tail they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, 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.