Load Specifications
Load data in caliber 7 mm Weath. Mag. with .283 | 140gr | Frontier PH HPBT 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% | 57,609 psi | 90% | 3005 fps | 99.3% |
| Accurate 3100 | <<locked>> | 98% | 57,377 psi | 90% | 3061 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 57,392 psi | 90% | 2986 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 55,042 psi | 86% | 3048 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 54,694 psi | 86% | 3146 fps | 97.7% |
| Accurate MAGPRO | <<locked>> | 96% | 55,724 psi | 87% | 3146 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 84% | 56,724 psi | 89% | 3015 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,927 psi | 88% | 3100 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 98% | 57,334 psi | 90% | 3156 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,740 psi | 62% | 2854 fps | 96.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,520 psi | 85% | 2989 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,898 psi | 88% | 3110 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 57,174 psi | 90% | 3127 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,477 psi | 87% | 3087 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 98% | 56,840 psi | 89% | 3150 fps | 98.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 57,740 psi | 90% | 3127 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,937 psi | 78% | 3061 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 54,433 psi | 85% | 3159 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 55,724 psi | 87% | 3127 fps | 98.6% |
| Bofors RP3 | <<locked>> | 82% | 55,419 psi | 87% | 3005 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,890 psi | 72% | 2976 fps | 96% |
| Bofors RP5 | <<locked>> | 98% | 56,840 psi | 89% | 3150 fps | 98.9% |
| Bofors RP7 | <<locked>> | 86% | 54,534 psi | 85% | 2995 fps | 99.1% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,298 psi | 77% | 3002 fps | 97.1% |
| Hodgdon H380 | <<locked>> | 82% | 55,651 psi | 87% | 3025 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 57,043 psi | 89% | 3104 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 56,188 psi | 88% | 3058 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 96% | 57,450 psi | 90% | 3094 fps | 97.3% |
| Hodgdon H4831 SC | <<locked>> | 96% | 56,391 psi | 88% | 3077 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 56,115 psi | 88% | 3025 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,936 psi | 77% | 3110 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 86% | 53,432 psi | 84% | 3074 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,680 psi | 57% | 1919 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,173 psi | 88% | 2999 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,898 psi | 88% | 3031 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,028 psi | 88% | 3022 fps | 99.5% |
| IMR 4831 | <<locked>> | 90% | 55,405 psi | 87% | 3038 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 55,085 psi | 86% | 3022 fps | 97% |
| IMR 7828 SSC | <<locked>> | 98% | 55,042 psi | 86% | 3130 fps | 97.6% |
| Lovex S062 | <<locked>> | 82% | 56,739 psi | 89% | 2992 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 56,420 psi | 88% | 3018 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 54,520 psi | 85% | 3009 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 51,010 psi | 80% | 2963 fps | 99.5% |
| Norma 203B | <<locked>> | 82% | 57,522 psi | 90% | 3051 fps | 100% |
| Norma 204 | <<locked>> | 90% | 56,913 psi | 89% | 3087 fps | 98.6% |
| Norma MRP | <<locked>> | 96% | 56,724 psi | 89% | 3173 fps | 99.6% |
| Norma URP | <<locked>> | 90% | 57,363 psi | 90% | 3087 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 55,492 psi | 87% | 3146 fps | 98% |
| Ramshot Hunter | <<locked>> | 90% | 56,115 psi | 88% | 3091 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,664 psi | 84% | 3077 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,492 psi | 59% | 1965 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,419 psi | 87% | 3009 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 56,652 psi | 89% | 3117 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 55,143 psi | 86% | 3071 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 57,217 psi | 90% | 3159 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,298 psi | 77% | 3107 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 84% | 55,753 psi | 87% | 3005 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 57,377 psi | 90% | 3068 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 94% | 54,911 psi | 86% | 3074 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 86% | 54,534 psi | 85% | 2995 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 88% | 56,420 psi | 88% | 3018 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 56,739 psi | 89% | 2992 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 54,520 psi | 85% | 3009 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 57,174 psi | 90% | 3064 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,883 psi | 88% | 2877 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 56,115 psi | 88% | 2972 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,462 psi | 85% | 3068 fps | 98.5% |
| Somchem S355 | <<locked>> | 84% | 55,405 psi | 87% | 2995 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,579 psi | 87% | 2999 fps | 96.9% |
| Somchem S365 | <<locked>> | 92% | 57,435 psi | 90% | 3091 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 55,390 psi | 87% | 3045 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 86% | 56,710 psi | 89% | 2969 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 55,550 psi | 87% | 3025 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,911 psi | 86% | 3022 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 82% | 57,421 psi | 90% | 2969 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 54,766 psi | 86% | 3028 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 56,666 psi | 89% | 3100 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 56,652 psi | 89% | 3166 fps | 97.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,504 psi | 82% | 3074 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 55,230 psi | 87% | 2986 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 57,305 psi | 90% | 3107 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 54,752 psi | 86% | 3209 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 55,419 psi | 87% | 3038 fps | 98.5% |
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% | 53,708 psi | 84% | 2943 fps | 98.8% |
| Accurate 3100 | <<locked>> | 82% | 33,272 psi | 52% | 2589 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 53,954 psi | 85% | 2933 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,843 psi | 66% | 2808 fps | 99.2% |
| Accurate High Country | 66.6 gr | 88% | 44,353 psi | 70% | 2946 fps | 95% |
| Accurate MAGPRO | <<locked>> | 94% | 51,996 psi | 81% | 3081 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 50,169 psi | 79% | 2910 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 42,873 psi | 67% | 2848 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 92% | 46,760 psi | 73% | 2956 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 98% | 37,318 psi | 58% | 2789 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,213 psi | 80% | 2936 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,234 psi | 63% | 2815 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,311 psi | 73% | 2949 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 42,815 psi | 67% | 2844 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 40,611 psi | 64% | 2835 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,878 psi | 47% | 2559 fps | 97.6% |
| Alliant Reloder-25 | <<locked>> | 86% | 31,676 psi | 50% | 2628 fps | 95.1% |
| Alliant Reloder-26 | 62.4 gr | 80% | 32,256 psi | 51% | 2684 fps | 96.3% |
| Bofors RP15 | <<locked>> | 92% | 42,917 psi | 67% | 2884 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 51,779 psi | 81% | 2946 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 42,989 psi | 67% | 2917 fps | 95.1% |
| Bofors RP5 | <<locked>> | 88% | 40,611 psi | 64% | 2835 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 45,092 psi | 71% | 2818 fps | 97.4% |
| Hodgdon H1000 | <<locked>> | 96% | 43,033 psi | 67% | 2867 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 52,069 psi | 82% | 2966 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 43,584 psi | 68% | 2858 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 80% | 46,253 psi | 72% | 2874 fps | 97% |
| Hodgdon H4831 | <<locked>> | 92% | 50,212 psi | 79% | 2969 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 49,081 psi | 77% | 2949 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,840 psi | 59% | 2700 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 94% | 40,089 psi | 63% | 2900 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 42,743 psi | 67% | 2871 fps | 97.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,412 psi | 43% | 1713 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,794 psi | 83% | 2943 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,712 psi | 64% | 2743 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,499 psi | 73% | 2848 fps | 98.1% |
| IMR 4831 | <<locked>> | 80% | 39,914 psi | 63% | 2753 fps | 98.9% |
| IMR 4955 Enduron | <<locked>> | 90% | 48,559 psi | 76% | 2904 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 94% | 48,066 psi | 75% | 2999 fps | 95.9% |
| Lovex S062 | <<locked>> | 80% | 53,113 psi | 83% | 2936 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,208 psi | 69% | 2799 fps | 98.7% |
| Lovex S070 | <<locked>> | 80% | 42,438 psi | 67% | 2782 fps | 97.5% |
| Lovex S071 | <<locked>> | 88% | 34,679 psi | 54% | 2625 fps | 95.9% |
| Norma 203B | <<locked>> | 80% | 53,853 psi | 84% | 2992 fps | 100% |
| Norma 204 | <<locked>> | 82% | 43,323 psi | 68% | 2835 fps | 95.7% |
| Norma MRP | 63.6 gr | 84% | 37,188 psi | 58% | 2782 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 41,336 psi | 65% | 2799 fps | 99.1% |
| Ramshot Grand | <<locked>> | 92% | 44,672 psi | 70% | 2936 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 40,132 psi | 63% | 2785 fps | 97.5% |
| Ramshot Magnum | <<locked>> | 92% | 39,914 psi | 63% | 2808 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,007 psi | 44% | 1755 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,938 psi | 81% | 2949 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,153 psi | 77% | 3002 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,727 psi | 65% | 2828 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,147 psi | 63% | 2835 fps | 98.6% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 37,072 psi | 58% | 2815 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 48,878 psi | 77% | 2894 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 47,326 psi | 74% | 2887 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 86% | 41,974 psi | 66% | 2825 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 45,092 psi | 71% | 2818 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,208 psi | 69% | 2799 fps | 98.7% |
| Shooters World Precision | <<locked>> | 80% | 53,113 psi | 83% | 2936 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,438 psi | 67% | 2782 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,082 psi | 78% | 2949 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,501 psi | 78% | 2785 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,120 psi | 68% | 2740 fps | 97.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 41,611 psi | 65% | 2818 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 48,979 psi | 77% | 2894 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 48,631 psi | 76% | 2877 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 37,971 psi | 60% | 2753 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 37,304 psi | 58% | 2687 fps | 95% |
| Vihtavuori N150 | <<locked>> | 80% | 46,760 psi | 73% | 2812 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,685 psi | 67% | 2795 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 88% | 39,320 psi | 62% | 2726 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 53,838 psi | 84% | 2917 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 42,221 psi | 66% | 2799 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 33,344 psi | 52% | 2641 fps | 97.7% |
| Vihtavuori N560 | <<locked>> | 92% | 49,371 psi | 77% | 3031 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 96% | 45,701 psi | 72% | 2943 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,727 psi | 65% | 2759 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,772 psi | 69% | 2858 fps | 97.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,426 psi | 41% | 2536 fps | 96.8% |
| Winchester Supreme 780 | <<locked>> | 88% | 42,003 psi | 66% | 2789 fps | 95.5% |
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 83 powders for 7 mm Weath. Mag. loaded with the .283 | 140gr | Frontier PH HPBT. Winchester StaBALL HD delivers the highest muzzle velocity at 3,209 fps; across all powders the maximum-charge window runs from 1,919 fps to 3,209 fps. ADI AR 2225 gives the best case fill at 100 %, and 83 of the 83 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 0.283" calls for a 1:10.0 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. Alliant Reloder-26, Accurate High Country, Norma MRP rank at the top here: for 7 mm Weath. Mag. with the .283 | 140gr | Frontier PH HPBT 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.