Load Specifications
Load data in caliber .240 Weath. Mag. with .243 | 100gr | Winchester SPBT 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.
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>> | 98% | 57,551 psi | 90% | 3100 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 57,624 psi | 90% | 3025 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 55,405 psi | 87% | 3091 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 54,911 psi | 86% | 3189 fps | 97.6% |
| Accurate MAGPRO | <<locked>> | 96% | 56,086 psi | 88% | 3192 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 84% | 57,043 psi | 89% | 3058 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 56,347 psi | 88% | 3140 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 96% | 53,925 psi | 85% | 3130 fps | 97.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,987 psi | 63% | 2890 fps | 96.7% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 56,275 psi | 88% | 3133 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,621 psi | 86% | 3028 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 56,072 psi | 88% | 3150 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 57,537 psi | 90% | 3169 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,535 psi | 87% | 3123 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 98% | 57,377 psi | 90% | 3196 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 98% | 54,259 psi | 85% | 3110 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 50,314 psi | 79% | 3104 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 54,926 psi | 86% | 3202 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 56,115 psi | 88% | 3169 fps | 98.6% |
| Bofors RP3 | <<locked>> | 82% | 55,579 psi | 87% | 3045 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 46,267 psi | 73% | 3018 fps | 96% |
| Bofors RP5 | <<locked>> | 98% | 57,377 psi | 90% | 3196 fps | 98.9% |
| Bofors RP7 | <<locked>> | 86% | 54,636 psi | 86% | 3031 fps | 99% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,588 psi | 78% | 3038 fps | 97% |
| Hodgdon H380 | <<locked>> | 82% | 55,724 psi | 87% | 3064 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 57,130 psi | 90% | 3143 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 56,449 psi | 88% | 3097 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 96% | 57,725 psi | 90% | 3133 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 56,637 psi | 89% | 3117 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 56,333 psi | 88% | 3068 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 49,284 psi | 77% | 3153 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 86% | 53,925 psi | 85% | 3117 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,869 psi | 58% | 1952 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,275 psi | 88% | 3038 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 56,072 psi | 88% | 3071 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,130 psi | 88% | 3061 fps | 99.4% |
| IMR 4831 | <<locked>> | 90% | 55,550 psi | 87% | 3077 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 55,463 psi | 87% | 3061 fps | 96.9% |
| IMR 7828 SSC | <<locked>> | 98% | 55,100 psi | 86% | 3166 fps | 97.5% |
| Lovex S062 | <<locked>> | 82% | 56,681 psi | 89% | 3031 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 56,536 psi | 89% | 3058 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 54,882 psi | 86% | 3051 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 51,068 psi | 80% | 2995 fps | 99.5% |
| Norma 203B | <<locked>> | 82% | 57,450 psi | 90% | 3087 fps | 100% |
| Norma 204 | <<locked>> | 90% | 57,261 psi | 90% | 3130 fps | 98.6% |
| Norma MRP | <<locked>> | 96% | 57,232 psi | 90% | 3222 fps | 99.6% |
| Norma URP | <<locked>> | 90% | 57,348 psi | 90% | 3127 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 55,738 psi | 87% | 3186 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 90% | 56,492 psi | 89% | 3130 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 54,157 psi | 85% | 3120 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,478 psi | 59% | 1995 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,448 psi | 87% | 3045 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 56,739 psi | 89% | 3156 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 55,419 psi | 87% | 3114 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 57,377 psi | 90% | 3199 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,676 psi | 78% | 3146 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 84% | 55,753 psi | 87% | 3041 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 57,566 psi | 90% | 3107 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 94% | 54,868 psi | 86% | 3110 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 86% | 54,636 psi | 86% | 3031 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 88% | 56,536 psi | 89% | 3058 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 56,681 psi | 89% | 3031 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 54,882 psi | 86% | 3051 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 57,392 psi | 90% | 3104 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,912 psi | 88% | 2917 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 56,260 psi | 88% | 3012 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,418 psi | 85% | 3104 fps | 98.4% |
| Somchem S355 | <<locked>> | 84% | 55,477 psi | 87% | 3038 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,738 psi | 87% | 3038 fps | 96.8% |
| Somchem S365 | <<locked>> | 92% | 57,624 psi | 90% | 3133 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 55,680 psi | 87% | 3084 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 86% | 56,898 psi | 89% | 3012 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 55,811 psi | 87% | 3068 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 55,085 psi | 86% | 3061 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 82% | 57,493 psi | 90% | 3005 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 54,911 psi | 86% | 3068 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 56,840 psi | 89% | 3143 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 57,130 psi | 90% | 3209 fps | 97.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,910 psi | 83% | 3114 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 55,390 psi | 87% | 3025 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 57,464 psi | 90% | 3146 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 54,940 psi | 86% | 3245 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 55,666 psi | 87% | 3077 fps | 98.4% |
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% | 33,272 psi | 52% | 2618 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 53,998 psi | 85% | 2972 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,858 psi | 66% | 2841 fps | 99.1% |
| Accurate High Country | 49.8 gr | 88% | 44,701 psi | 70% | 2989 fps | 95% |
| Accurate MAGPRO | <<locked>> | 94% | 52,040 psi | 82% | 3117 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 50,386 psi | 79% | 2949 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 42,931 psi | 67% | 2884 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 92% | 47,050 psi | 74% | 2999 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 98% | 37,478 psi | 59% | 2822 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 43,366 psi | 68% | 2884 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,169 psi | 80% | 2972 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,321 psi | 63% | 2854 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,485 psi | 73% | 2989 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 42,902 psi | 67% | 2881 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 88% | 40,799 psi | 64% | 2871 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,892 psi | 47% | 2589 fps | 97.5% |
| Alliant Reloder-25 | <<locked>> | 88% | 33,924 psi | 53% | 2723 fps | 96.1% |
| Alliant Reloder-26 | 46.6 gr | 80% | 32,358 psi | 51% | 2713 fps | 96.1% |
| Bofors RP15 | <<locked>> | 92% | 43,091 psi | 68% | 2920 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 51,996 psi | 81% | 2989 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 43,149 psi | 68% | 2953 fps | 95% |
| Bofors RP5 | <<locked>> | 88% | 40,799 psi | 64% | 2871 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 45,179 psi | 71% | 2854 fps | 97.3% |
| Hodgdon H1000 | <<locked>> | 96% | 43,192 psi | 68% | 2904 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 52,185 psi | 82% | 3005 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 43,845 psi | 69% | 2894 fps | 97.5% |
| Hodgdon H4350 | <<locked>> | 80% | 46,441 psi | 73% | 2913 fps | 96.9% |
| Hodgdon H4831 | <<locked>> | 92% | 50,314 psi | 79% | 3005 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 92% | 49,400 psi | 77% | 2989 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,913 psi | 59% | 2733 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 94% | 40,335 psi | 63% | 2940 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 43,076 psi | 68% | 2910 fps | 97% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,470 psi | 43% | 1745 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,026 psi | 83% | 2986 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,814 psi | 64% | 2779 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,586 psi | 73% | 2884 fps | 98% |
| IMR 4831 | <<locked>> | 80% | 40,234 psi | 63% | 2795 fps | 98.9% |
| IMR 4955 Enduron | <<locked>> | 90% | 48,718 psi | 76% | 2940 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 94% | 48,341 psi | 76% | 3038 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 53,432 psi | 84% | 2979 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,237 psi | 69% | 2835 fps | 98.7% |
| Lovex S070 | <<locked>> | 80% | 42,569 psi | 67% | 2815 fps | 97.4% |
| Lovex S071 | <<locked>> | 88% | 34,780 psi | 55% | 2657 fps | 95.7% |
| Norma 203B | <<locked>> | 80% | 53,867 psi | 84% | 3031 fps | 100% |
| Norma 204 | <<locked>> | 82% | 43,526 psi | 68% | 2874 fps | 95.6% |
| Norma MRP | 47.5 gr | 84% | 37,318 psi | 58% | 2815 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 41,481 psi | 65% | 2835 fps | 99% |
| Ramshot Grand | <<locked>> | 92% | 45,005 psi | 71% | 2979 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 40,379 psi | 63% | 2825 fps | 97.4% |
| Ramshot Magnum | <<locked>> | 92% | 40,118 psi | 63% | 2844 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,079 psi | 44% | 1788 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,011 psi | 82% | 2989 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,327 psi | 77% | 3041 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,829 psi | 66% | 2864 fps | 98.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,350 psi | 63% | 2874 fps | 98.5% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 37,144 psi | 58% | 2844 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 49,081 psi | 77% | 2936 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 47,514 psi | 74% | 2923 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 86% | 42,018 psi | 66% | 2858 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 45,179 psi | 71% | 2854 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,237 psi | 69% | 2835 fps | 98.7% |
| Shooters World Precision | <<locked>> | 80% | 53,432 psi | 84% | 2979 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,569 psi | 67% | 2815 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,357 psi | 79% | 2992 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,559 psi | 78% | 2822 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,221 psi | 68% | 2772 fps | 97.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 41,640 psi | 65% | 2854 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 48,965 psi | 77% | 2930 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 48,791 psi | 76% | 2913 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 38,087 psi | 60% | 2789 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 40,001 psi | 63% | 2782 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 46,934 psi | 74% | 2851 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,699 psi | 67% | 2831 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 88% | 39,566 psi | 62% | 2762 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 53,954 psi | 85% | 2956 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 42,337 psi | 66% | 2835 fps | 99% |
| Vihtavuori N555 | <<locked>> | 80% | 33,431 psi | 52% | 2674 fps | 97.5% |
| Vihtavuori N560 | <<locked>> | 92% | 49,603 psi | 78% | 3071 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 98% | 49,153 psi | 77% | 3045 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,785 psi | 65% | 2795 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,845 psi | 69% | 2894 fps | 97.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,585 psi | 42% | 2569 fps | 96.7% |
| Winchester Supreme 780 | <<locked>> | 88% | 42,206 psi | 66% | 2828 fps | 95.4% |
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 .240 Weath. Mag. loaded with the .243 | 100gr | Winchester SPBT. Winchester StaBALL HD delivers the highest muzzle velocity at 3,245 fps; across all powders the maximum-charge window runs from 1,952 fps to 3,245 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 58–90 %, leaving at least 10 % headroom. The 100.0 gr projectile in 0.243" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-25, Bofors RP15 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 .240 Weath. Mag. with the .243 | 100gr | Winchester SPBT 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.