Load Specifications
Load data in caliber .240 Weath. Mag. with .243 | 80gr | Fox Classic Hunter bullet and 96 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-16 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% | 54,375 psi | 85% | 3241 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 56,449 psi | 88% | 3294 fps | 97.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,588 psi | 78% | 3245 fps | 97.5% |
| Accurate 4064 | <<locked>> | 86% | 54,868 psi | 86% | 3301 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 55,390 psi | 87% | 3389 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 84% | 57,580 psi | 90% | 3386 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 55,434 psi | 87% | 3330 fps | 99.7% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 56,768 psi | 89% | 3422 fps | 96.3% |
| ADI Benchmark 8208 | <<locked>> | 82% | 56,101 psi | 88% | 3327 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 54,201 psi | 85% | 3451 fps | 99.7% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 56,739 psi | 89% | 3419 fps | 96.4% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 56,739 psi | 89% | 3419 fps | 96.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 55,941 psi | 88% | 3356 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 56,260 psi | 88% | 3379 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 96% | 56,289 psi | 88% | 3458 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 90% | 53,708 psi | 84% | 3425 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 55,883 psi | 88% | 3406 fps | 96.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,702 psi | 73% | 3274 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 53,563 psi | 84% | 3481 fps | 99.4% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,143 psi | 85% | 3333 fps | 99.5% |
| Bofors RP3 | <<locked>> | 88% | 56,637 psi | 89% | 3369 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 56,478 psi | 89% | 3340 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 82% | 57,624 psi | 90% | 3310 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 56,391 psi | 88% | 3356 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 57,595 psi | 90% | 3389 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 92% | 54,056 psi | 85% | 3376 fps | 97.5% |
| Hodgdon H4350 | <<locked>> | 90% | 54,143 psi | 85% | 3337 fps | 96.2% |
| Hodgdon H4895 | <<locked>> | 82% | 54,505 psi | 85% | 3333 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 56,594 psi | 89% | 3373 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 54,752 psi | 86% | 3373 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 54,650 psi | 86% | 3415 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,998 psi | 56% | 2146 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 55,912 psi | 88% | 3343 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 55,085 psi | 86% | 3327 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 54,607 psi | 86% | 3307 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 86% | 57,653 psi | 90% | 3343 fps | 98% |
| IMR 4350 | <<locked>> | 96% | 57,130 psi | 90% | 3366 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 90% | 54,491 psi | 85% | 3310 fps | 97.4% |
| IMR 4831 | <<locked>> | 96% | 56,072 psi | 88% | 3383 fps | 99.6% |
| IMR 4895 | <<locked>> | 84% | 54,012 psi | 85% | 3350 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 82% | 56,101 psi | 88% | 3327 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,389 psi | 85% | 3301 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 56,492 psi | 89% | 3304 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 54,723 psi | 86% | 3307 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 54,491 psi | 85% | 3304 fps | 98.6% |
| Lovex S070 | <<locked>> | 94% | 55,782 psi | 87% | 3346 fps | 97.9% |
| Norma 201 | <<locked>> | 84% | 56,159 psi | 88% | 3323 fps | 100% |
| Norma 202 | <<locked>> | 84% | 57,029 psi | 89% | 3327 fps | 100% |
| Norma 203B | <<locked>> | 86% | 55,550 psi | 87% | 3363 fps | 99.9% |
| Norma MRPᴾ | <<locked>> | 100% | 52,475 psi | 82% | 3422 fps | 97.1% |
| Norma URP | <<locked>> | 94% | 54,230 psi | 85% | 3373 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 86% | 56,507 psi | 89% | 3389 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 96% | 57,000 psi | 89% | 3432 fps | 98.7% |
| Ramshot TAC | <<locked>> | 82% | 56,724 psi | 89% | 3343 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 82% | 56,463 psi | 88% | 3363 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,448 psi | 57% | 2192 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 57,377 psi | 90% | 3363 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 57,232 psi | 90% | 3455 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 57,130 psi | 90% | 3488 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 55,303 psi | 87% | 3409 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 54,230 psi | 85% | 3435 fps | 99.2% |
| Rottweil R 901 | <<locked>> | 82% | 56,782 psi | 89% | 3304 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 56,782 psi | 89% | 3323 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 56,826 psi | 89% | 3366 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 54,926 psi | 86% | 3389 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 92% | 56,478 psi | 89% | 3340 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 92% | 54,491 psi | 85% | 3304 fps | 98.6% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,389 psi | 85% | 3301 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 54,723 psi | 86% | 3307 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 55,782 psi | 87% | 3346 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 54,984 psi | 86% | 3369 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 55,303 psi | 87% | 3317 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 56,260 psi | 88% | 3350 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 57,290 psi | 90% | 3258 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 54,650 psi | 86% | 3199 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 54,549 psi | 85% | 3251 fps | 97.5% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 54,433 psi | 85% | 3383 fps | 96.1% |
| Somchem S335 | <<locked>> | 84% | 56,768 psi | 89% | 3248 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,158 psi | 86% | 3314 fps | 99.9% |
| Somchem S355 | <<locked>> | 90% | 56,913 psi | 89% | 3363 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 57,000 psi | 89% | 3442 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 55,869 psi | 88% | 3363 fps | 97.2% |
| Vihtavuori N133 | <<locked>> | 84% | 57,696 psi | 90% | 3238 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 57,029 psi | 89% | 3284 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 57,682 psi | 90% | 3301 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 54,723 psi | 86% | 3278 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 56,405 psi | 88% | 3369 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 82% | 56,710 psi | 89% | 3327 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 55,985 psi | 88% | 3291 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 55,651 psi | 87% | 3373 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 52,127 psi | 82% | 3363 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 56,521 psi | 89% | 3337 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 57,479 psi | 90% | 3383 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 54,404 psi | 85% | 3383 fps | 97.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,206 psi | 66% | 3301 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 84% | 56,188 psi | 88% | 3356 fps | 100% |
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% | 47,587 psi | 75% | 3130 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 49,182 psi | 77% | 3159 fps | 95.5% |
| Accurate 3100 | <<locked>> | 96% | 43,163 psi | 68% | 3110 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 45,034 psi | 71% | 3127 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 36,245 psi | 57% | 2979 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 50,749 psi | 80% | 3261 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 80% | 42,960 psi | 67% | 3081 fps | 98% |
| ADI AR 2209 | <<locked>> | 98% | 53,287 psi | 84% | 3356 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 52,852 psi | 83% | 3268 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 46,876 psi | 73% | 3304 fps | 98.8% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 53,287 psi | 84% | 3353 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 53,287 psi | 84% | 3353 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,265 psi | 68% | 3110 fps | 99.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,325 psi | 73% | 3189 fps | 98.7% |
| Alliant Reloder-16 | 42.6 gr | 82% | 35,737 psi | 56% | 2995 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,913 psi | 59% | 3081 fps | 97.9% |
| Alliant Reloder-19 | <<locked>> | 98% | 52,518 psi | 82% | 3343 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 88% | 31,517 psi | 49% | 2877 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 90% | 36,999 psi | 58% | 3094 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,444 psi | 79% | 3264 fps | 99% |
| Bofors RP3 | <<locked>> | 80% | 43,236 psi | 68% | 3114 fps | 99.2% |
| Bofors RP7 | <<locked>> | 86% | 46,499 psi | 73% | 3143 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 54,012 psi | 85% | 3251 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 52,446 psi | 82% | 3291 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 43,874 psi | 69% | 3120 fps | 97.2% |
| Hodgdon H414 | <<locked>> | 86% | 44,324 psi | 69% | 3176 fps | 95% |
| Hodgdon H4350 | <<locked>> | 88% | 50,633 psi | 79% | 3268 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 51,329 psi | 80% | 3274 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,995 psi | 49% | 2812 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 47,834 psi | 75% | 3241 fps | 99.8% |
| Hodgdon Superformance | 52 gr | 88% | 47,050 psi | 74% | 3258 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,832 psi | 42% | 1923 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,907 psi | 77% | 3212 fps | 99.6% |
| IMR 3031 | <<locked>> | 80% | 51,343 psi | 80% | 3264 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,150 psi | 71% | 3123 fps | 98.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,659 psi | 75% | 3150 fps | 95.9% |
| IMR 4350 | <<locked>> | 90% | 47,152 psi | 74% | 3176 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 45,339 psi | 71% | 3123 fps | 95.2% |
| IMR 4831 | <<locked>> | 84% | 37,492 psi | 59% | 2995 fps | 95.9% |
| IMR 4895 | <<locked>> | 80% | 47,529 psi | 74% | 3225 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 80% | 52,852 psi | 83% | 3268 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 50,807 psi | 80% | 3238 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,879 psi | 78% | 3182 fps | 99.6% |
| Lovex S062 | <<locked>> | 80% | 45,324 psi | 71% | 3127 fps | 99.6% |
| Lovex S065 | <<locked>> | 82% | 39,871 psi | 62% | 2995 fps | 95.1% |
| Lovex S070 | <<locked>> | 88% | 45,992 psi | 72% | 3156 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 49,443 psi | 77% | 3202 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 50,183 psi | 79% | 3212 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,716 psi | 72% | 3173 fps | 99% |
| Norma MRP | <<locked>> | 96% | 45,585 psi | 71% | 3274 fps | 95.2% |
| Norma URP | <<locked>> | 82% | 36,419 psi | 57% | 2986 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 45,629 psi | 72% | 3182 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 88% | 43,439 psi | 68% | 3163 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 52,924 psi | 83% | 3278 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 52,910 psi | 83% | 3301 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,296 psi | 43% | 1972 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,092 psi | 69% | 3100 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,763 psi | 78% | 3320 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,292 psi | 63% | 3156 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 38,740 psi | 61% | 3061 fps | 95.8% |
| ReloadSwiss RS 70 | 48.9 gr | 86% | 41,017 psi | 64% | 3146 fps | 96.1% |
| Rottweil R 901 | <<locked>> | 80% | 53,447 psi | 84% | 3251 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 47,065 psi | 74% | 3146 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 40,712 psi | 64% | 3051 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 98% | 51,517 psi | 81% | 3323 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 86% | 46,499 psi | 73% | 3143 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 82% | 39,871 psi | 62% | 2995 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,807 psi | 80% | 3238 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,324 psi | 71% | 3127 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 45,992 psi | 72% | 3156 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,930 psi | 66% | 3107 fps | 98.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,721 psi | 81% | 3255 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,342 psi | 77% | 3225 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,314 psi | 79% | 3143 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,293 psi | 66% | 2982 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 44,788 psi | 70% | 3061 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 51,039 psi | 80% | 3317 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 50,125 psi | 79% | 3140 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,300 psi | 80% | 3245 fps | 99.6% |
| Somchem S355 | <<locked>> | 80% | 41,133 psi | 64% | 3054 fps | 98.5% |
| Somchem S365 | <<locked>> | 80% | 30,414 psi | 48% | 2854 fps | 96.5% |
| Somchem S385 | <<locked>> | 96% | 49,023 psi | 77% | 3238 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 50,763 psi | 80% | 3130 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 46,905 psi | 74% | 3120 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,485 psi | 74% | 3133 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,305 psi | 62% | 2976 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 82% | 37,681 psi | 59% | 2982 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 53,011 psi | 83% | 3264 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 45,992 psi | 72% | 3117 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 37,376 psi | 59% | 2982 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 88% | 34,664 psi | 54% | 2972 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,853 psi | 55% | 2887 fps | 97.2% |
| Winchester 748 | <<locked>> | 80% | 53,722 psi | 84% | 3320 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 44,324 psi | 69% | 3176 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 92% | 32,111 psi | 50% | 2986 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,168 psi | 77% | 3228 fps | 99.7% |
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 96 powders for .240 Weath. Mag. loaded with the .243 | 80gr | Fox Classic Hunter. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,488 fps; across all powders the maximum-charge window runs from 2,146 fps to 3,488 fps. Accurate 3100 gives the best case fill at 100 %, and 96 of the 96 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 80.0 gr projectile in 0.243" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint 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. ReloadSwiss RS 70, Alliant Reloder-16, Hodgdon Superformance rank at the top here: for .240 Weath. Mag. with the .243 | 80gr | Fox Classic Hunter 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.