Load Specifications
Load data in caliber .240 Weath. Mag. with .243 | 105gr | Speer RN bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Ramshot Grand and Accurate High Country.
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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 56,652 psi | 89% | 3025 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 54,230 psi | 85% | 3009 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 54,273 psi | 85% | 3114 fps | 98% |
| Accurate MAGPRO | <<locked>> | 94% | 55,042 psi | 86% | 3114 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 82% | 55,521 psi | 87% | 2972 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 55,013 psi | 86% | 3061 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 96% | 56,724 psi | 89% | 3123 fps | 98.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,398 psi | 74% | 2940 fps | 96.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,206 psi | 66% | 2894 fps | 98.2% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 55,317 psi | 87% | 3054 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,884 psi | 89% | 2995 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 55,288 psi | 87% | 3068 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 56,449 psi | 88% | 3084 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 54,636 psi | 86% | 3048 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 96% | 56,565 psi | 89% | 3117 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 98% | 57,435 psi | 90% | 3091 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,171 psi | 83% | 3091 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 54,114 psi | 85% | 3123 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 55,361 psi | 87% | 3097 fps | 98.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,197 psi | 77% | 3015 fps | 97.4% |
| Bofors RP5 | <<locked>> | 96% | 56,565 psi | 89% | 3117 fps | 99.1% |
| Bofors RP7 | <<locked>> | 86% | 57,087 psi | 89% | 3012 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,170 psi | 82% | 3035 fps | 98.2% |
| Hodgdon H414 | <<locked>> | 86% | 56,275 psi | 88% | 3068 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 84% | 55,114 psi | 86% | 3018 fps | 99% |
| Hodgdon H4831 | <<locked>> | 94% | 56,623 psi | 89% | 3058 fps | 97.6% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,622 psi | 87% | 3041 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 55,463 psi | 87% | 2989 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,141 psi | 82% | 3153 fps | 99.3% |
| Hodgdon Superformance | <<locked>> | 86% | 56,492 psi | 89% | 3100 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,854 psi | 58% | 1913 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,056 psi | 86% | 2995 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,984 psi | 86% | 2982 fps | 99.6% |
| IMR 4831 | <<locked>> | 88% | 54,708 psi | 86% | 3002 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 57,609 psi | 90% | 3041 fps | 97.9% |
| IMR 7828 SSC | <<locked>> | 96% | 54,230 psi | 85% | 3091 fps | 97.9% |
| Lovex S065 | <<locked>> | 86% | 55,506 psi | 87% | 2979 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 57,116 psi | 90% | 3028 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,954 psi | 85% | 2986 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 55,912 psi | 88% | 3048 fps | 98.8% |
| Norma MRP | <<locked>> | 94% | 56,188 psi | 88% | 3140 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 56,405 psi | 88% | 3048 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,897 psi | 86% | 3114 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 88% | 55,303 psi | 87% | 3051 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 57,406 psi | 90% | 3110 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,768 psi | 59% | 1959 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,609 psi | 90% | 3022 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 55,695 psi | 87% | 3071 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,389 psi | 85% | 3031 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 56,608 psi | 89% | 3120 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 52,895 psi | 83% | 3153 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 82% | 54,810 psi | 86% | 2963 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,463 psi | 88% | 3031 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 92% | 54,027 psi | 85% | 3035 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 86% | 57,087 psi | 89% | 3012 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,506 psi | 87% | 2979 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 57,116 psi | 90% | 3028 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,101 psi | 88% | 3022 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 54,679 psi | 86% | 2835 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,679 psi | 86% | 2927 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 57,334 psi | 90% | 3091 fps | 99.2% |
| Somchem S355 | <<locked>> | 82% | 54,476 psi | 85% | 2956 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,389 psi | 85% | 2959 fps | 97.1% |
| Somchem S365 | <<locked>> | 90% | 56,913 psi | 89% | 3051 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 54,839 psi | 86% | 3012 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 84% | 55,448 psi | 87% | 2923 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,578 psi | 86% | 2982 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,215 psi | 85% | 2986 fps | 99.1% |
| Vihtavuori N550 | <<locked>> | 88% | 57,624 psi | 90% | 3045 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,159 psi | 88% | 3064 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 56,043 psi | 88% | 3130 fps | 97.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 55,970 psi | 88% | 3107 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,128 psi | 85% | 2943 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,275 psi | 88% | 3068 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 98% | 54,752 psi | 86% | 3169 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,679 psi | 86% | 3002 fps | 98.7% |
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>> | 80% | 32,996 psi | 52% | 2556 fps | 95.7% |
| Accurate 4350 | <<locked>> | 80% | 44,382 psi | 70% | 2835 fps | 99.7% |
| Accurate High Country | 49.1 gr | 86% | 44,034 psi | 69% | 2913 fps | 95.4% |
| Accurate MAGPRO | 52.3 gr | 90% | 47,834 psi | 75% | 2976 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 52,388 psi | 82% | 2920 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 39,523 psi | 62% | 2749 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 90% | 46,325 psi | 73% | 2927 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 98% | 44,295 psi | 69% | 2874 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 94% | 34,737 psi | 54% | 2697 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 39,740 psi | 62% | 2749 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,345 psi | 84% | 2943 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,351 psi | 66% | 2838 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,965 psi | 77% | 2966 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 39,407 psi | 62% | 2743 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 86% | 40,147 psi | 63% | 2802 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,560 psi | 49% | 2585 fps | 98.6% |
| Alliant Reloder-25 | <<locked>> | 84% | 31,444 psi | 49% | 2598 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 34,301 psi | 54% | 2713 fps | 97.6% |
| Bofors RP15 | <<locked>> | 88% | 39,856 psi | 62% | 2792 fps | 95.2% |
| Bofors RP30 | <<locked>> | 96% | 42,815 psi | 67% | 2887 fps | 95.6% |
| Bofors RP5 | <<locked>> | 86% | 40,147 psi | 63% | 2802 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 47,065 psi | 74% | 2835 fps | 98.2% |
| Hodgdon H1000 | <<locked>> | 94% | 42,511 psi | 67% | 2841 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 45,948 psi | 72% | 2877 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 80% | 48,443 psi | 76% | 2897 fps | 97.9% |
| Hodgdon H4831 | <<locked>> | 88% | 46,282 psi | 73% | 2871 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 90% | 48,588 psi | 76% | 2917 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,929 psi | 63% | 2717 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 39,914 psi | 63% | 2877 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 45,310 psi | 71% | 2897 fps | 98.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,543 psi | 43% | 1709 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,627 psi | 67% | 2762 fps | 97.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,443 psi | 76% | 2864 fps | 98.8% |
| IMR 4831 | <<locked>> | 80% | 42,264 psi | 66% | 2776 fps | 99.5% |
| IMR 4955 Enduron | <<locked>> | 86% | 44,889 psi | 70% | 2808 fps | 95% |
| IMR 7828 SSC | <<locked>> | 90% | 44,237 psi | 69% | 2897 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 46,122 psi | 72% | 2815 fps | 99.3% |
| Lovex S070 | <<locked>> | 80% | 44,469 psi | 70% | 2799 fps | 98.3% |
| Lovex S071 | <<locked>> | 84% | 32,198 psi | 50% | 2536 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 42,612 psi | 67% | 2795 fps | 96% |
| Norma MRP | <<locked>> | 82% | 36,782 psi | 58% | 2749 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 43,526 psi | 68% | 2818 fps | 99.6% |
| Ramshot Grand | 50.9 gr | 90% | 44,135 psi | 69% | 2907 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 42,395 psi | 66% | 2812 fps | 98.4% |
| Ramshot Magnum | <<locked>> | 88% | 36,767 psi | 58% | 2710 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,181 psi | 44% | 1749 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 54,070 psi | 85% | 2963 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,953 psi | 81% | 3012 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,034 psi | 69% | 2848 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,380 psi | 66% | 2861 fps | 99.3% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 36,767 psi | 58% | 2789 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 51,314 psi | 80% | 2910 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 43,729 psi | 69% | 2792 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 82% | 38,754 psi | 61% | 2726 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 47,065 psi | 74% | 2835 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,122 psi | 72% | 2815 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 80% | 44,469 psi | 70% | 2799 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,605 psi | 82% | 2963 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,488 psi | 81% | 2789 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,005 psi | 71% | 2756 fps | 98.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 41,133 psi | 64% | 2785 fps | 95.9% |
| Somchem S355 | <<locked>> | 80% | 51,082 psi | 80% | 2900 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 47,718 psi | 75% | 2841 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 40,306 psi | 63% | 2772 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,782 psi | 58% | 2651 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 48,965 psi | 77% | 2825 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,049 psi | 71% | 2818 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 86% | 38,827 psi | 61% | 2694 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 44,295 psi | 69% | 2815 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 35,404 psi | 55% | 2667 fps | 98.6% |
| Vihtavuori N560 | <<locked>> | 88% | 45,556 psi | 71% | 2933 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 94% | 45,527 psi | 71% | 2917 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,019 psi | 69% | 2779 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,948 psi | 72% | 2877 fps | 98.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 28,065 psi | 44% | 2582 fps | 98.4% |
| Winchester Supreme 780 | <<locked>> | 86% | 41,379 psi | 65% | 2756 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 76 powders for .240 Weath. Mag. loaded with the .243 | 105gr | Speer RN. Winchester StaBALL HD delivers the highest muzzle velocity at 3,169 fps; across all powders the maximum-charge window runs from 1,913 fps to 3,169 fps. ADI AR 2217 gives the best case fill at 100 %, and 76 of the 76 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 105.0 gr projectile in 0.243" calls for a 1:12.0 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. Accurate MAGPRO, Ramshot Grand, Accurate High Country rank at the top here: for .240 Weath. Mag. with the .243 | 105gr | Speer RN 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.