Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 135gr | Atomic 29 HP bullet and 83 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% | 56,666 psi | 89% | 3038 fps | 99% |
| Accurate 3100 | <<locked>> | 98% | 56,449 psi | 88% | 3097 fps | 99.8% |
| Accurate 4064 | <<locked>> | 82% | 56,565 psi | 89% | 3022 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,186 psi | 85% | 3084 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 53,809 psi | 84% | 3179 fps | 97.2% |
| Accurate MAGPRO | <<locked>> | 96% | 54,737 psi | 86% | 3176 fps | 96% |
| ADI AR 2208 | <<locked>> | 84% | 56,202 psi | 88% | 3058 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,274 psi | 87% | 3133 fps | 98.2% |
| ADI AR 2213 | <<locked>> | 98% | 56,492 psi | 89% | 3186 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,319 psi | 90% | 3084 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,334 psi | 90% | 3107 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,056 psi | 86% | 3150 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,231 psi | 88% | 3166 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,563 psi | 86% | 3117 fps | 98.2% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,956 psi | 88% | 3182 fps | 98.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,797 psi | 89% | 3163 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,124 psi | 77% | 3094 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 96% | 57,638 psi | 90% | 3261 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,839 psi | 86% | 3159 fps | 98.2% |
| Bofors RP3 | <<locked>> | 82% | 54,737 psi | 86% | 3045 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 55,956 psi | 88% | 3182 fps | 98.5% |
| Bofors RP7 | <<locked>> | 88% | 57,334 psi | 90% | 3087 fps | 99.2% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,747 psi | 76% | 3031 fps | 96.5% |
| Hodgdon H380 | <<locked>> | 82% | 54,795 psi | 86% | 3061 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,217 psi | 88% | 3140 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 86% | 55,434 psi | 87% | 3094 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 96% | 56,637 psi | 89% | 3127 fps | 96.8% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,608 psi | 87% | 3107 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,521 psi | 87% | 3068 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,138 psi | 75% | 3136 fps | 97.9% |
| Hodgdon Superformance | <<locked>> | 88% | 56,637 psi | 89% | 3176 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,608 psi | 57% | 1955 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,434 psi | 87% | 3038 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,129 psi | 86% | 3068 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,448 psi | 87% | 3058 fps | 99.2% |
| IMR 4831 | <<locked>> | 90% | 54,766 psi | 86% | 3077 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,520 psi | 85% | 3054 fps | 96.5% |
| IMR 7828 SSC | <<locked>> | 98% | 54,215 psi | 85% | 3159 fps | 97.1% |
| Lovex S062 | <<locked>> | 82% | 55,970 psi | 88% | 3031 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,767 psi | 87% | 3058 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 57,421 psi | 90% | 3104 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,053 psi | 78% | 2992 fps | 99.2% |
| Norma 203B | <<locked>> | 82% | 56,652 psi | 89% | 3091 fps | 100% |
| Norma 204 | <<locked>> | 90% | 56,028 psi | 88% | 3120 fps | 98.2% |
| Norma MRP | <<locked>> | 96% | 55,999 psi | 88% | 3212 fps | 99.4% |
| Norma URP | <<locked>> | 90% | 56,507 psi | 89% | 3127 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 57,667 psi | 90% | 3117 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,810 psi | 86% | 3179 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 90% | 55,216 psi | 87% | 3123 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,837 psi | 83% | 3107 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,376 psi | 59% | 2001 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,563 psi | 86% | 3041 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,724 psi | 87% | 3156 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,201 psi | 85% | 3104 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,362 psi | 88% | 3196 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,530 psi | 76% | 3133 fps | 98.9% |
| Rottweil R 903 | <<locked>> | 84% | 54,839 psi | 86% | 3041 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,753 psi | 89% | 3104 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 94% | 53,940 psi | 85% | 3104 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 88% | 57,334 psi | 90% | 3087 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,767 psi | 87% | 3058 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 55,970 psi | 88% | 3031 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,421 psi | 90% | 3104 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,449 psi | 88% | 3104 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,201 psi | 87% | 2920 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,405 psi | 87% | 3009 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 57,319 psi | 90% | 3163 fps | 98.7% |
| Somchem S355 | <<locked>> | 84% | 54,592 psi | 86% | 3035 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,882 psi | 86% | 3031 fps | 96.4% |
| Somchem S365 | <<locked>> | 92% | 56,449 psi | 88% | 3130 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,665 psi | 86% | 3081 fps | 98.9% |
| Vihtavuori N150 | <<locked>> | 86% | 56,057 psi | 88% | 3012 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,766 psi | 86% | 3061 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,667 psi | 90% | 3110 fps | 99% |
| Vihtavuori N540 | <<locked>> | 82% | 56,608 psi | 89% | 3009 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,551 psi | 90% | 3120 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,622 psi | 87% | 3136 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,970 psi | 88% | 3199 fps | 97% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,532 psi | 81% | 3100 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,302 psi | 85% | 3022 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,420 psi | 88% | 3143 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,417 psi | 84% | 3241 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,592 psi | 86% | 3071 fps | 98.1% |
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% | 53,127 psi | 83% | 2979 fps | 98.5% |
| Accurate 3100 | <<locked>> | 84% | 34,969 psi | 55% | 2674 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 53,200 psi | 83% | 2972 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,089 psi | 64% | 2838 fps | 98.8% |
| Accurate High Country | 69 gr | 90% | 46,847 psi | 73% | 3045 fps | 95.4% |
| Accurate MAGPRO | <<locked>> | 94% | 51,097 psi | 80% | 3110 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 49,530 psi | 78% | 2946 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 42,264 psi | 66% | 2877 fps | 95% |
| ADI AR 2213 | <<locked>> | 94% | 49,429 psi | 77% | 3054 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,502 psi | 79% | 2972 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,693 psi | 84% | 3045 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,610 psi | 62% | 2848 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,397 psi | 71% | 2979 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 42,206 psi | 66% | 2874 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 90% | 42,743 psi | 67% | 2927 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,356 psi | 46% | 2582 fps | 97% |
| Alliant Reloder-25 | <<locked>> | 88% | 33,344 psi | 52% | 2713 fps | 95.4% |
| Alliant Reloder-26 | 63.2 gr | 80% | 31,691 psi | 50% | 2703 fps | 95.5% |
| Bofors RP15 | <<locked>> | 92% | 42,148 psi | 66% | 2910 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 51,198 psi | 80% | 2986 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 42,743 psi | 67% | 2927 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 44,701 psi | 70% | 2854 fps | 97% |
| Hodgdon H1000 | <<locked>> | 98% | 45,484 psi | 71% | 2966 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 51,271 psi | 80% | 2999 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 43,018 psi | 67% | 2887 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 80% | 45,774 psi | 72% | 2910 fps | 96.5% |
| Hodgdon H4831 | <<locked>> | 92% | 49,385 psi | 77% | 2999 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 51,924 psi | 81% | 3045 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,202 psi | 58% | 2730 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 96% | 42,279 psi | 66% | 2995 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 42,018 psi | 66% | 2897 fps | 96.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,441 psi | 43% | 1749 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,127 psi | 82% | 2982 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,118 psi | 63% | 2772 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,890 psi | 72% | 2881 fps | 97.7% |
| IMR 4831 | <<locked>> | 80% | 39,450 psi | 62% | 2789 fps | 98.6% |
| IMR 4955 Enduron | <<locked>> | 92% | 51,082 psi | 80% | 2992 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 94% | 47,195 psi | 74% | 3025 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 52,417 psi | 82% | 2976 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,613 psi | 68% | 2831 fps | 98.4% |
| Lovex S070 | <<locked>> | 80% | 41,800 psi | 66% | 2812 fps | 97% |
| Lovex S071 | <<locked>> | 88% | 34,011 psi | 53% | 2648 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 53,055 psi | 83% | 3031 fps | 100% |
| Norma 204 | <<locked>> | 82% | 42,728 psi | 67% | 2867 fps | 95.1% |
| Norma MRP | 65.9 gr | 86% | 39,175 psi | 61% | 2874 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 40,640 psi | 64% | 2828 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 80% | 54,012 psi | 85% | 3058 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 47,253 psi | 74% | 3035 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 39,566 psi | 62% | 2815 fps | 97% |
| Ramshot Magnum | <<locked>> | 92% | 39,262 psi | 62% | 2831 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,021 psi | 44% | 1791 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,140 psi | 80% | 2982 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,211 psi | 76% | 3038 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,075 psi | 64% | 2858 fps | 98.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,552 psi | 62% | 2864 fps | 98.1% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 39,175 psi | 61% | 2907 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 80% | 48,138 psi | 75% | 2930 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 46,717 psi | 73% | 2920 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 86% | 41,365 psi | 65% | 2854 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 44,701 psi | 70% | 2854 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,613 psi | 68% | 2831 fps | 98.4% |
| Shooters World Precision | <<locked>> | 80% | 52,417 psi | 82% | 2976 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,800 psi | 66% | 2812 fps | 97% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,501 psi | 78% | 2989 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,936 psi | 77% | 2825 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,699 psi | 67% | 2772 fps | 97.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 43,714 psi | 69% | 2910 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 48,283 psi | 76% | 2930 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 51,242 psi | 80% | 2969 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 37,231 psi | 58% | 2782 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 39,349 psi | 62% | 2776 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 46,122 psi | 72% | 2851 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,989 psi | 66% | 2828 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 90% | 41,437 psi | 65% | 2815 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 53,084 psi | 83% | 2956 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,495 psi | 65% | 2828 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 80% | 32,706 psi | 51% | 2667 fps | 97.1% |
| Vihtavuori N560 | <<locked>> | 92% | 48,660 psi | 76% | 3061 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 98% | 48,109 psi | 75% | 3031 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,118 psi | 64% | 2792 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 43,018 psi | 67% | 2887 fps | 97.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,020 psi | 41% | 2552 fps | 95.8% |
| Winchester Supreme 780 | <<locked>> | 90% | 44,295 psi | 69% | 2881 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 90 powders for 7 mm Weath. Mag. loaded with the .284 | 135gr | Atomic 29 HP. Alliant Reloder-26 delivers the highest muzzle velocity at 3,261 fps; across all powders the maximum-charge window runs from 1,955 fps to 3,261 fps. ADI AR 2217 gives the best case fill at 100 %, and 90 of the 90 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 135.0 gr projectile in 0.284" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-23 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 | 135gr | Atomic 29 HP 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.