Load Specifications
Load data in caliber .240 Weath. Mag. with .243 | 90gr | CutEdge MTAC bullet and 95 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-16, ReloadSwiss RS 70 and Hodgdon Superformance.
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 2495 | <<locked>> | 84% | 56,304 psi | 88% | 3107 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 54,781 psi | 86% | 3123 fps | 97.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,083 psi | 82% | 3146 fps | 98.8% |
| Accurate 4064 | <<locked>> | 86% | 56,666 psi | 89% | 3166 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,114 psi | 85% | 3215 fps | 99.8% |
| Accurate High Countryᴾ | <<locked>> | 100% | 57,624 psi | 90% | 3373 fps | 96.9% |
| ADI AR 2206H | <<locked>> | 82% | 56,101 psi | 88% | 3199 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 57,493 psi | 90% | 3205 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 55,782 psi | 87% | 3261 fps | 97.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 57,000 psi | 89% | 3340 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 55,912 psi | 88% | 3258 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,679 psi | 86% | 3176 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,969 psi | 86% | 3199 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 55,259 psi | 87% | 3284 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 56,811 psi | 89% | 3314 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 55,056 psi | 86% | 3248 fps | 97.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,199 psi | 82% | 3235 fps | 96.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,139 psi | 77% | 3173 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,627 psi | 67% | 3064 fps | 97.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 56,840 psi | 89% | 3383 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,463 psi | 88% | 3219 fps | 100% |
| Bofors RP3 | <<locked>> | 86% | 55,361 psi | 87% | 3189 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,199 psi | 82% | 3235 fps | 96.8% |
| Bofors RP7 | <<locked>> | 90% | 54,853 psi | 86% | 3166 fps | 98% |
| Hodgdon H380 | <<locked>> | 86% | 55,970 psi | 88% | 3205 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 92% | 56,869 psi | 89% | 3274 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 90% | 56,608 psi | 89% | 3232 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 82% | 56,724 psi | 89% | 3209 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,579 psi | 87% | 3202 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 57,276 psi | 90% | 3248 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 53,345 psi | 84% | 3241 fps | 98.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,984 psi | 56% | 2024 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,476 psi | 85% | 3159 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 57,551 psi | 90% | 3192 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,942 psi | 89% | 3189 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,188 psi | 88% | 3166 fps | 98.7% |
| IMR 4350 | <<locked>> | 94% | 56,014 psi | 88% | 3202 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,637 psi | 89% | 3199 fps | 98.7% |
| IMR 4831 | <<locked>> | 94% | 54,969 psi | 86% | 3209 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 56,449 psi | 88% | 3232 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 56,449 psi | 88% | 3169 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,853 psi | 86% | 3117 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,971 psi | 89% | 3179 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,637 psi | 89% | 3192 fps | 99.5% |
| Lovex S070 | <<locked>> | 92% | 54,375 psi | 85% | 3176 fps | 98.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,062 psi | 67% | 2976 fps | 97% |
| Norma 201 | <<locked>> | 82% | 54,723 psi | 86% | 3140 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,419 psi | 87% | 3136 fps | 100% |
| Norma 203B | <<locked>> | 86% | 57,725 psi | 90% | 3238 fps | 100% |
| Norma 204 | <<locked>> | 94% | 57,101 psi | 89% | 3258 fps | 97.4% |
| Norma MRPᴾ | <<locked>> | 100% | 55,637 psi | 87% | 3333 fps | 98.7% |
| Norma URP | <<locked>> | 94% | 56,637 psi | 89% | 3261 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 54,955 psi | 86% | 3205 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 55,854 psi | 88% | 3261 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,738 psi | 58% | 2073 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,912 psi | 88% | 3186 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,811 psi | 87% | 3271 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 56,260 psi | 88% | 3307 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,201 psi | 85% | 3238 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 57,058 psi | 89% | 3337 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 84% | 55,376 psi | 87% | 3140 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,201 psi | 87% | 3182 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 57,653 psi | 90% | 3232 fps | 96.5% |
| Rottweil R 905 | <<locked>> | 98% | 54,128 psi | 85% | 3228 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 90% | 54,853 psi | 86% | 3166 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,637 psi | 89% | 3192 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,449 psi | 88% | 3169 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,971 psi | 89% | 3179 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,375 psi | 85% | 3176 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 57,203 psi | 90% | 3248 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 57,421 psi | 90% | 3202 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,636 psi | 86% | 3166 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,695 psi | 87% | 3071 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,521 psi | 89% | 3068 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,391 psi | 88% | 3140 fps | 98.7% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 57,305 psi | 90% | 3284 fps | 97.8% |
| Somchem S335 | <<locked>> | 82% | 55,332 psi | 87% | 3064 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 57,421 psi | 90% | 3192 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,259 psi | 87% | 3176 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 56,289 psi | 88% | 3264 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,621 psi | 86% | 3199 fps | 98% |
| Vihtavuori N133 | <<locked>> | 82% | 56,246 psi | 88% | 3054 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,782 psi | 87% | 3100 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,231 psi | 88% | 3117 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 57,000 psi | 89% | 3156 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,259 psi | 87% | 3196 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,488 psi | 79% | 3107 fps | 96.9% |
| Vihtavuori N540 | <<locked>> | 84% | 54,331 psi | 85% | 3107 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 54,563 psi | 86% | 3199 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,940 psi | 86% | 3261 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,361 psi | 87% | 3163 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,869 psi | 89% | 3274 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,222 psi | 69% | 3219 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,679 psi | 86% | 3173 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,143 psi | 86% | 3196 fps | 97.2% |
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 2495 | <<locked>> | 80% | 49,052 psi | 77% | 2995 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,819 psi | 75% | 2995 fps | 96.4% |
| Accurate 3100 | <<locked>> | 92% | 39,160 psi | 61% | 2887 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 46,470 psi | 73% | 2999 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,375 psi | 55% | 2822 fps | 96.3% |
| Accurate High Country | <<locked>> | 98% | 53,534 psi | 84% | 3297 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 52,721 psi | 83% | 3143 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,541 psi | 70% | 2969 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 94% | 48,675 psi | 76% | 3127 fps | 95.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,371 psi | 77% | 3202 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 48,820 psi | 77% | 3127 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,962 psi | 70% | 2999 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,196 psi | 76% | 3074 fps | 99.6% |
| Alliant Reloder-16 | 40.8 gr | 80% | 34,882 psi | 55% | 2838 fps | 96.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,523 psi | 62% | 2979 fps | 99.2% |
| Alliant Reloder-19 | <<locked>> | 94% | 48,196 psi | 76% | 3117 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 96% | 45,498 psi | 71% | 3100 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 84% | 28,761 psi | 45% | 2671 fps | 95.2% |
| Alliant Reloder-25 | <<locked>> | 96% | 37,536 psi | 59% | 2936 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 88% | 36,042 psi | 56% | 2940 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,446 psi | 82% | 3150 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 44,976 psi | 70% | 3002 fps | 99.9% |
| Bofors RP5 | <<locked>> | 96% | 45,498 psi | 71% | 3100 fps | 95% |
| Bofors RP7 | <<locked>> | 82% | 42,395 psi | 66% | 2917 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 45,658 psi | 72% | 3015 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 82% | 40,234 psi | 63% | 2943 fps | 95% |
| Hodgdon H4350 | <<locked>> | 84% | 46,354 psi | 73% | 3038 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 53,301 psi | 84% | 3153 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,242 psi | 51% | 2720 fps | 97.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,806 psi | 78% | 3127 fps | 100% |
| Hodgdon Superformance | 48.7 gr | 84% | 42,496 psi | 67% | 3022 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,847 psi | 42% | 1814 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,865 psi | 80% | 3097 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,519 psi | 84% | 3130 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,833 psi | 73% | 3009 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,400 psi | 77% | 3041 fps | 97.5% |
| IMR 4350 | <<locked>> | 86% | 43,424 psi | 68% | 2956 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,408 psi | 65% | 2897 fps | 95.3% |
| IMR 4831 | <<locked>> | 80% | 34,142 psi | 54% | 2772 fps | 95.9% |
| IMR 4895 | <<locked>> | 80% | 49,429 psi | 77% | 3107 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 52,605 psi | 82% | 3110 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,561 psi | 81% | 3061 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,920 psi | 74% | 3009 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,522 psi | 60% | 2831 fps | 96% |
| Lovex S070 | <<locked>> | 84% | 42,076 psi | 66% | 2930 fps | 95.9% |
| Lovex S071 | <<locked>> | 96% | 37,579 psi | 59% | 2848 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 51,068 psi | 80% | 3077 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,083 psi | 82% | 3084 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,543 psi | 75% | 3061 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 49,559 psi | 78% | 3120 fps | 95.7% |
| Norma MRP | <<locked>> | 92% | 41,568 psi | 65% | 3045 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 35,389 psi | 55% | 2822 fps | 96.2% |
| Ramshot Big Game | <<locked>> | 80% | 47,848 psi | 75% | 3081 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 39,595 psi | 62% | 2933 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,325 psi | 43% | 1857 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,643 psi | 72% | 2995 fps | 97.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,909 psi | 81% | 3202 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,061 psi | 66% | 3051 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,317 psi | 55% | 2838 fps | 95.9% |
| ReloadSwiss RS 70 | 45.7 gr | 82% | 37,043 psi | 58% | 2910 fps | 96% |
| Rottweil R 902 | <<locked>> | 80% | 48,834 psi | 77% | 3028 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,264 psi | 66% | 2943 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 96% | 53,766 psi | 84% | 3166 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 94% | 47,137 psi | 74% | 3094 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 82% | 42,395 psi | 66% | 2917 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,522 psi | 60% | 2831 fps | 96% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,605 psi | 82% | 3110 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,920 psi | 74% | 3009 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 42,076 psi | 66% | 2930 fps | 95.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,613 psi | 68% | 3002 fps | 99.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,592 psi | 84% | 3140 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,082 psi | 80% | 3104 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,243 psi | 82% | 3018 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,005 psi | 69% | 2864 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 40,495 psi | 63% | 2835 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 46,702 psi | 73% | 3087 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 51,779 psi | 81% | 3012 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,301 psi | 84% | 3123 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,612 psi | 67% | 2943 fps | 99.5% |
| Somchem S365 | <<locked>> | 80% | 31,720 psi | 50% | 2766 fps | 98.2% |
| Somchem S385 | <<locked>> | 92% | 44,788 psi | 70% | 3012 fps | 95.8% |
| Vihtavuori N133 | <<locked>> | 80% | 52,823 psi | 83% | 3002 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,979 psi | 77% | 2995 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,313 psi | 77% | 3005 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,843 psi | 64% | 2871 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 36,898 psi | 58% | 2828 fps | 96.7% |
| Vihtavuori N165 | <<locked>> | 96% | 43,976 psi | 69% | 2979 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 47,761 psi | 75% | 2995 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,376 psi | 57% | 2825 fps | 96.3% |
| Vihtavuori N555 | <<locked>> | 84% | 31,705 psi | 50% | 2756 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,129 psi | 57% | 2792 fps | 98.6% |
| Winchester 760 | <<locked>> | 82% | 40,524 psi | 64% | 2949 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 88% | 28,993 psi | 45% | 2762 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,053 psi | 80% | 3110 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 47,819 psi | 75% | 3064 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 95 powders for .240 Weath. Mag. loaded with the .243 | 90gr | CutEdge MTAC. Alliant Reloder-26 delivers the highest muzzle velocity at 3,383 fps; across all powders the maximum-charge window runs from 2,024 fps to 3,383 fps. Accurate 3100 gives the best case fill at 100 %, and 95 of the 95 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 90.0 gr projectile in 0.243" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, Alliant Reloder-22 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-16, ReloadSwiss RS 70, Hodgdon Superformance rank at the top here: for .240 Weath. Mag. with the .243 | 90gr | CutEdge MTAC 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.