Load Specifications
Load data in caliber .240 Weath. Mag. with .243 | 100gr | Sierra SP SemiSp 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% | 57,667 psi | 90% | 3045 fps | 99.2% |
| Accurate 3100 | <<locked>> | 96% | 53,940 psi | 85% | 3045 fps | 99.7% |
| Accurate 4064 | <<locked>> | 82% | 57,624 psi | 90% | 3025 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 55,651 psi | 87% | 3097 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 55,492 psi | 87% | 3196 fps | 97.7% |
| Accurate MAGPRO | <<locked>> | 96% | 56,289 psi | 88% | 3192 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 84% | 57,290 psi | 90% | 3064 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 56,594 psi | 89% | 3146 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 96% | 54,128 psi | 85% | 3136 fps | 97.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,161 psi | 63% | 2894 fps | 96.8% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 56,507 psi | 89% | 3136 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,882 psi | 86% | 3035 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 56,376 psi | 88% | 3156 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 53,679 psi | 84% | 3110 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,767 psi | 87% | 3127 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 98% | 57,595 psi | 90% | 3196 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 98% | 54,853 psi | 86% | 3120 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 50,531 psi | 79% | 3110 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 55,158 psi | 86% | 3209 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 56,362 psi | 88% | 3176 fps | 98.7% |
| Bofors RP3 | <<locked>> | 82% | 55,840 psi | 88% | 3048 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 46,470 psi | 73% | 3022 fps | 96.1% |
| Bofors RP5 | <<locked>> | 98% | 57,595 psi | 90% | 3196 fps | 98.9% |
| Bofors RP7 | <<locked>> | 86% | 54,853 psi | 86% | 3035 fps | 99% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,748 psi | 78% | 3045 fps | 97.1% |
| Hodgdon H380 | <<locked>> | 82% | 56,028 psi | 88% | 3071 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 57,406 psi | 90% | 3146 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 56,695 psi | 89% | 3104 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 94% | 54,099 psi | 85% | 3074 fps | 96.5% |
| Hodgdon H4831 SC | <<locked>> | 96% | 56,855 psi | 89% | 3120 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 56,623 psi | 89% | 3071 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 49,516 psi | 78% | 3156 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 86% | 54,157 psi | 85% | 3123 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,695 psi | 57% | 1952 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,550 psi | 89% | 3045 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 56,318 psi | 88% | 3074 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,347 psi | 88% | 3064 fps | 99.4% |
| IMR 4831 | <<locked>> | 90% | 55,825 psi | 87% | 3081 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 55,666 psi | 87% | 3068 fps | 97% |
| IMR 7828 SSC | <<locked>> | 98% | 55,347 psi | 87% | 3169 fps | 97.5% |
| Lovex S062 | <<locked>> | 82% | 56,956 psi | 89% | 3035 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 56,811 psi | 89% | 3061 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 54,824 psi | 86% | 3051 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 51,300 psi | 80% | 3002 fps | 99.5% |
| Norma 204 | <<locked>> | 90% | 57,493 psi | 90% | 3136 fps | 98.6% |
| Norma MRP | <<locked>> | 96% | 57,450 psi | 90% | 3222 fps | 99.7% |
| Norma URP | <<locked>> | 90% | 57,624 psi | 90% | 3133 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 56,333 psi | 88% | 3199 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 90% | 56,724 psi | 89% | 3136 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 54,389 psi | 85% | 3127 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,565 psi | 59% | 1998 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,666 psi | 87% | 3051 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 57,058 psi | 89% | 3159 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 55,695 psi | 87% | 3117 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 53,824 psi | 84% | 3143 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,835 psi | 78% | 3153 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 84% | 56,057 psi | 88% | 3048 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,114 psi | 85% | 3051 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 94% | 55,114 psi | 86% | 3114 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 86% | 54,853 psi | 86% | 3035 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 88% | 56,811 psi | 89% | 3061 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 56,956 psi | 89% | 3035 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 54,824 psi | 86% | 3051 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 57,653 psi | 90% | 3110 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,173 psi | 88% | 2920 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 56,449 psi | 88% | 3015 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,665 psi | 86% | 3107 fps | 98.5% |
| Somchem S355 | <<locked>> | 84% | 55,782 psi | 87% | 3041 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,912 psi | 88% | 3041 fps | 96.9% |
| Somchem S365 | <<locked>> | 90% | 54,085 psi | 85% | 3081 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 55,898 psi | 88% | 3087 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 86% | 57,159 psi | 90% | 3015 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 56,086 psi | 88% | 3071 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 55,317 psi | 87% | 3064 fps | 98.9% |
| Vihtavuori N550 | <<locked>> | 88% | 55,158 psi | 86% | 3074 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 57,101 psi | 89% | 3146 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 57,406 psi | 90% | 3212 fps | 97.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 53,113 psi | 83% | 3117 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 55,608 psi | 87% | 3028 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 57,740 psi | 90% | 3153 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 55,550 psi | 87% | 3255 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 55,941 psi | 88% | 3084 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% | 54,070 psi | 85% | 2986 fps | 98.8% |
| Accurate 3100 | <<locked>> | 82% | 33,460 psi | 52% | 2621 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 54,317 psi | 85% | 2979 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 42,163 psi | 66% | 2851 fps | 99.2% |
| Accurate High Country | 50 gr | 88% | 44,947 psi | 70% | 2992 fps | 95.1% |
| Accurate MAGPRO | <<locked>> | 94% | 52,591 psi | 82% | 3127 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 50,357 psi | 79% | 2949 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 43,178 psi | 68% | 2887 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 92% | 47,253 psi | 74% | 3002 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 98% | 37,637 psi | 59% | 2828 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 43,584 psi | 68% | 2890 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,459 psi | 81% | 2979 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,596 psi | 64% | 2858 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,485 psi | 73% | 2989 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 43,120 psi | 68% | 2884 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 88% | 41,031 psi | 64% | 2877 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,095 psi | 47% | 2595 fps | 97.6% |
| Alliant Reloder-25 | <<locked>> | 86% | 31,923 psi | 50% | 2664 fps | 95% |
| Alliant Reloder-26 | 46.8 gr | 80% | 32,547 psi | 51% | 2720 fps | 96.2% |
| Bofors RP15 | <<locked>> | 92% | 43,323 psi | 68% | 2927 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 52,272 psi | 82% | 2992 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 43,352 psi | 68% | 2956 fps | 95.1% |
| Bofors RP5 | <<locked>> | 88% | 41,031 psi | 64% | 2877 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 45,397 psi | 71% | 2861 fps | 97.4% |
| Hodgdon H1000 | <<locked>> | 96% | 43,381 psi | 68% | 2910 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 52,475 psi | 82% | 3009 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 44,077 psi | 69% | 2900 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 80% | 46,702 psi | 73% | 2920 fps | 97% |
| Hodgdon H4831 | <<locked>> | 92% | 50,531 psi | 79% | 3009 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 92% | 49,617 psi | 78% | 2992 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,145 psi | 60% | 2740 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 94% | 40,509 psi | 63% | 2946 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 43,047 psi | 67% | 2910 fps | 97.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,586 psi | 43% | 1749 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,997 psi | 83% | 2986 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,060 psi | 64% | 2782 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,847 psi | 73% | 2890 fps | 98.1% |
| IMR 4831 | <<locked>> | 80% | 40,219 psi | 63% | 2792 fps | 98.9% |
| IMR 4955 Enduron | <<locked>> | 90% | 48,936 psi | 77% | 2946 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 94% | 48,544 psi | 76% | 3045 fps | 95.9% |
| Lovex S062 | <<locked>> | 80% | 53,403 psi | 84% | 2982 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,483 psi | 70% | 2838 fps | 98.7% |
| Lovex S070 | <<locked>> | 80% | 42,569 psi | 67% | 2818 fps | 97.4% |
| Lovex S071 | <<locked>> | 88% | 35,012 psi | 55% | 2661 fps | 95.8% |
| Norma 204 | <<locked>> | 82% | 43,758 psi | 69% | 2877 fps | 95.7% |
| Norma MRP | 47.7 gr | 84% | 37,507 psi | 59% | 2822 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 41,495 psi | 65% | 2838 fps | 99% |
| Ramshot Grand | <<locked>> | 92% | 45,208 psi | 71% | 2986 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 40,364 psi | 63% | 2822 fps | 97.4% |
| Ramshot Magnum | <<locked>> | 92% | 40,292 psi | 63% | 2848 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,949 psi | 44% | 1785 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,243 psi | 82% | 2992 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,313 psi | 77% | 3041 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,061 psi | 66% | 2867 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,567 psi | 64% | 2881 fps | 98.6% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 37,550 psi | 59% | 2858 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 49,052 psi | 77% | 2933 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 47,761 psi | 75% | 2930 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 86% | 42,221 psi | 66% | 2864 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 45,397 psi | 71% | 2861 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,483 psi | 70% | 2838 fps | 98.7% |
| Shooters World Precision | <<locked>> | 80% | 53,403 psi | 84% | 2982 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,569 psi | 67% | 2818 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,343 psi | 79% | 2992 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,850 psi | 78% | 2828 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,439 psi | 68% | 2779 fps | 97.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 41,858 psi | 66% | 2858 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 49,269 psi | 77% | 2936 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 48,994 psi | 77% | 2920 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 38,377 psi | 60% | 2795 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 37,637 psi | 59% | 2726 fps | 95% |
| Vihtavuori N150 | <<locked>> | 80% | 46,905 psi | 74% | 2854 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,960 psi | 67% | 2838 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 88% | 39,755 psi | 62% | 2769 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 42,554 psi | 67% | 2841 fps | 99% |
| Vihtavuori N555 | <<locked>> | 80% | 33,663 psi | 53% | 2680 fps | 97.6% |
| Vihtavuori N560 | <<locked>> | 92% | 49,821 psi | 78% | 3077 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 96% | 46,079 psi | 72% | 2982 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,018 psi | 66% | 2799 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,077 psi | 69% | 2900 fps | 97.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,585 psi | 42% | 2569 fps | 96.7% |
| Winchester Supreme 780 | <<locked>> | 88% | 42,424 psi | 66% | 2835 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 82 powders for .240 Weath. Mag. loaded with the .243 | 100gr | Sierra SP SemiSp. Winchester StaBALL HD delivers the highest muzzle velocity at 3,255 fps; across all powders the maximum-charge window runs from 1,952 fps to 3,255 fps. ADI AR 2225 gives the best case fill at 100 %, and 82 of the 82 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 100.0 gr projectile in 0.243" calls for a 1:11.5 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 | Sierra SP SemiSp 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.