Load Specifications
Load data in caliber .240 Weath. Mag. with .243 | 90gr | Impala RNFP KO bullet and 77 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and Alliant Reloder-16.
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 2700 | <<locked>> | 82% | 55,883 psi | 88% | 3123 fps | 98.1% |
| Accurate 3100 | <<locked>> | 98% | 55,172 psi | 86% | 3179 fps | 99.2% |
| Accurate 4064 | <<locked>> | 82% | 56,507 psi | 89% | 3136 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 56,956 psi | 89% | 3238 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 84% | 54,810 psi | 86% | 3146 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,942 psi | 89% | 3264 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,130 psi | 88% | 3179 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,376 psi | 88% | 3202 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,594 psi | 89% | 3287 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,288 psi | 85% | 3255 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 56,478 psi | 89% | 3255 fps | 97.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 57,551 psi | 90% | 3317 fps | 97.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,621 psi | 86% | 3251 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,863 psi | 75% | 3166 fps | 99% |
| Alliant Reloder-26 | <<locked>> | 96% | 55,201 psi | 87% | 3340 fps | 99.9% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,040 psi | 83% | 3235 fps | 96.9% |
| Bofors RP3 | <<locked>> | 84% | 57,522 psi | 90% | 3202 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 57,551 psi | 90% | 3317 fps | 97.9% |
| Bofors RP7 | <<locked>> | 88% | 56,405 psi | 88% | 3176 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 84% | 57,537 psi | 90% | 3212 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 88% | 54,534 psi | 85% | 3215 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 88% | 57,377 psi | 90% | 3228 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 57,261 psi | 90% | 3209 fps | 100% |
| Hodgdon Superformance | <<locked>> | 88% | 54,665 psi | 86% | 3251 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,854 psi | 58% | 2034 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,711 psi | 90% | 3182 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,724 psi | 89% | 3159 fps | 98.8% |
| IMR 4350 | <<locked>> | 92% | 57,188 psi | 90% | 3202 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 88% | 57,522 psi | 90% | 3199 fps | 98.8% |
| IMR 4831 | <<locked>> | 92% | 56,782 psi | 89% | 3222 fps | 100% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,840 psi | 88% | 3287 fps | 96.1% |
| Lovex S062 | <<locked>> | 82% | 55,187 psi | 86% | 3130 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,868 psi | 86% | 3143 fps | 99.3% |
| Lovex S070 | <<locked>> | 90% | 56,376 psi | 88% | 3192 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,414 psi | 77% | 3081 fps | 98.4% |
| Norma 203B | <<locked>> | 82% | 55,695 psi | 87% | 3186 fps | 100% |
| Norma 204 | <<locked>> | 90% | 54,288 psi | 85% | 3192 fps | 96.9% |
| Norma MRP | <<locked>> | 98% | 57,551 psi | 90% | 3350 fps | 99% |
| Norma URP | <<locked>> | 90% | 55,027 psi | 86% | 3212 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 82% | 56,231 psi | 88% | 3205 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,420 psi | 88% | 3304 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 92% | 57,058 psi | 89% | 3264 fps | 99.4% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,024 psi | 80% | 3173 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,507 psi | 59% | 2080 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,029 psi | 89% | 3189 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 57,493 psi | 90% | 3310 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 56,550 psi | 89% | 3258 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 54,418 psi | 85% | 3274 fps | 99.8% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,210 psi | 74% | 3192 fps | 97.4% |
| Rottweil R 902 | <<locked>> | 82% | 57,072 psi | 89% | 3146 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 57,653 psi | 90% | 3196 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 55,027 psi | 86% | 3173 fps | 96% |
| Rottweil R 905 | <<locked>> | 96% | 55,912 psi | 88% | 3245 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 88% | 56,405 psi | 88% | 3176 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,868 psi | 86% | 3143 fps | 99.3% |
| Shooters World Precision | <<locked>> | 82% | 55,187 psi | 86% | 3130 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,376 psi | 88% | 3192 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,042 psi | 86% | 3196 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 57,522 psi | 90% | 3064 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,302 psi | 85% | 3087 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 55,419 psi | 87% | 3238 fps | 97.5% |
| Somchem S355 | <<locked>> | 86% | 57,217 psi | 90% | 3189 fps | 100% |
| Somchem S365 | <<locked>> | 92% | 54,563 psi | 86% | 3222 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 56,753 psi | 89% | 3219 fps | 98.4% |
| Vihtavuori N135 | <<locked>> | 82% | 57,334 psi | 90% | 3100 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 57,319 psi | 90% | 3114 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 55,013 psi | 86% | 3107 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,884 psi | 89% | 3205 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,927 psi | 88% | 3186 fps | 98% |
| Vihtavuori N540 | <<locked>> | 82% | 55,651 psi | 87% | 3107 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,144 psi | 88% | 3209 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 98% | 57,682 psi | 90% | 3284 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 57,624 psi | 90% | 3333 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 56,333 psi | 88% | 3163 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,810 psi | 86% | 3225 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,169 psi | 79% | 3320 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,594 psi | 89% | 3205 fps | 97.5% |
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% | 52,431 psi | 82% | 3064 fps | 97.5% |
| Accurate 3100 | <<locked>> | 86% | 37,681 psi | 59% | 2828 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 53,272 psi | 83% | 3084 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,118 psi | 64% | 2933 fps | 98.1% |
| ADI AR 2208 | <<locked>> | 80% | 48,776 psi | 76% | 3038 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 90% | 47,007 psi | 74% | 3074 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,719 psi | 78% | 3068 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,895 psi | 83% | 3140 fps | 99.9% |
| Alliant Reloder-16 | 41.1 gr | 80% | 39,059 psi | 61% | 2930 fps | 97.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,411 psi | 70% | 3071 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 46,833 psi | 73% | 3071 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 47,442 psi | 74% | 3127 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,704 psi | 47% | 2674 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 92% | 37,550 psi | 59% | 2917 fps | 96% |
| Alliant Reloder-26 | 46.5 gr | 82% | 33,982 psi | 53% | 2861 fps | 95.3% |
| Bofors RP15 | <<locked>> | 96% | 46,818 psi | 73% | 3110 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 50,778 psi | 80% | 3091 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 47,442 psi | 74% | 3127 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 44,251 psi | 69% | 2936 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 50,575 psi | 79% | 3091 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 80% | 42,308 psi | 66% | 2969 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 80% | 44,991 psi | 71% | 2989 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,869 psi | 58% | 2818 fps | 98.6% |
| Hodgdon Superformance | <<locked>> | 80% | 41,321 psi | 65% | 2976 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,586 psi | 43% | 1821 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,314 psi | 80% | 3077 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,287 psi | 84% | 3100 fps | 98.3% |
| IMR 4350 | <<locked>> | 82% | 42,192 psi | 66% | 2910 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,266 psi | 71% | 2966 fps | 96.5% |
| IMR 4831 | <<locked>> | 80% | 39,146 psi | 61% | 2874 fps | 97.7% |
| IMR 7828 SSC | <<locked>> | 98% | 52,257 psi | 82% | 3219 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 52,069 psi | 82% | 3081 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,424 psi | 68% | 2920 fps | 97.4% |
| Lovex S070 | <<locked>> | 80% | 41,901 psi | 66% | 2900 fps | 95.9% |
| Lovex S071 | <<locked>> | 90% | 36,579 psi | 57% | 2799 fps | 95% |
| Norma 203B | <<locked>> | 80% | 52,286 psi | 82% | 3130 fps | 100% |
| Norma 204 | <<locked>> | 86% | 47,848 psi | 75% | 3071 fps | 95.3% |
| Norma MRP | 48.5 gr | 88% | 41,365 psi | 65% | 3022 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 40,364 psi | 63% | 2920 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 80% | 52,765 psi | 83% | 3150 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 52,707 psi | 83% | 3235 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 39,030 psi | 61% | 2897 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 96% | 44,440 psi | 70% | 3035 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,224 psi | 44% | 1867 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,299 psi | 79% | 3068 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,949 psi | 74% | 3130 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,480 psi | 63% | 2943 fps | 97.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,088 psi | 61% | 2943 fps | 96.9% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 41,263 psi | 65% | 3041 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 53,867 psi | 84% | 3094 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 48,022 psi | 75% | 3031 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 51,880 psi | 81% | 3114 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 90% | 46,064 psi | 72% | 3054 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 44,251 psi | 69% | 2936 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,424 psi | 68% | 2920 fps | 97.4% |
| Shooters World Precision | <<locked>> | 80% | 52,069 psi | 82% | 3081 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,901 psi | 66% | 2900 fps | 95.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,414 psi | 76% | 3074 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,109 psi | 75% | 2920 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,569 psi | 67% | 2858 fps | 96% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 45,643 psi | 72% | 3048 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 47,819 psi | 75% | 3022 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 36,941 psi | 58% | 2877 fps | 99.5% |
| Somchem S385 | <<locked>> | 88% | 44,121 psi | 69% | 2979 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 53,998 psi | 85% | 3051 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 54,070 psi | 85% | 3064 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,818 psi | 72% | 2946 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,510 psi | 65% | 2913 fps | 98% |
| Vihtavuori N165 | <<locked>> | 94% | 46,180 psi | 72% | 3005 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 52,286 psi | 82% | 3051 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,176 psi | 65% | 2917 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 80% | 32,982 psi | 52% | 2766 fps | 96.1% |
| Vihtavuori N560 | <<locked>> | 96% | 53,969 psi | 85% | 3268 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,509 psi | 63% | 2874 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 42,569 psi | 67% | 2972 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 82% | 28,384 psi | 44% | 2713 fps | 95.9% |
| Winchester Supreme 780 | <<locked>> | 92% | 46,441 psi | 73% | 3018 fps | 95.1% |
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 77 powders for .240 Weath. Mag. loaded with the .243 | 90gr | Impala RNFP KO. Norma MRP delivers the highest muzzle velocity at 3,350 fps; across all powders the maximum-charge window runs from 2,034 fps to 3,350 fps. Alliant Reloder-22 gives the best case fill at 100 %, and 77 of the 77 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 90.0 gr projectile in 0.243" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-22, 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, Norma MRP, Alliant Reloder-16 rank at the top here: for .240 Weath. Mag. with the .243 | 90gr | Impala RNFP KO 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.