Load Specifications
Load data in caliber .240 Weath. Mag. with .243 | 80gr | Osprey Virtus bullet and 97 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.
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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 2015 | <<locked>> | 82% | 57,580 psi | 90% | 3271 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 57,261 psi | 90% | 3294 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 56,188 psi | 88% | 3301 fps | 97.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,182 psi | 77% | 3245 fps | 97.5% |
| Accurate 4064 | <<locked>> | 86% | 53,954 psi | 85% | 3294 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 55,216 psi | 87% | 3392 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 84% | 57,479 psi | 90% | 3392 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 55,071 psi | 86% | 3330 fps | 99.7% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 56,782 psi | 89% | 3432 fps | 96.5% |
| ADI Benchmark 8208 | <<locked>> | 82% | 56,115 psi | 88% | 3333 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 57,522 psi | 90% | 3307 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 54,128 psi | 85% | 3458 fps | 99.7% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 56,710 psi | 89% | 3425 fps | 96.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 55,463 psi | 87% | 3356 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 55,782 psi | 87% | 3379 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 96% | 56,144 psi | 88% | 3461 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 92% | 57,740 psi | 90% | 3497 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 55,869 psi | 88% | 3412 fps | 96.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,238 psi | 72% | 3271 fps | 99.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 53,679 psi | 84% | 3488 fps | 99.5% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 57,696 psi | 90% | 3406 fps | 99.8% |
| Bofors RP3 | <<locked>> | 88% | 56,275 psi | 88% | 3373 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 56,231 psi | 88% | 3346 fps | 97.4% |
| Hodgdon Benchmark | <<locked>> | 82% | 57,348 psi | 90% | 3314 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 56,144 psi | 88% | 3363 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 57,290 psi | 90% | 3392 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 92% | 54,099 psi | 85% | 3386 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 92% | 57,638 psi | 90% | 3406 fps | 97% |
| Hodgdon H4895 | <<locked>> | 82% | 54,418 psi | 85% | 3340 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 56,347 psi | 88% | 3376 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 54,650 psi | 86% | 3376 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 54,578 psi | 86% | 3419 fps | 97.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,853 psi | 56% | 2152 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 55,579 psi | 87% | 3343 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 54,795 psi | 86% | 3327 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 54,563 psi | 86% | 3317 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 86% | 57,580 psi | 90% | 3353 fps | 98.1% |
| IMR 4350 | <<locked>> | 96% | 57,261 psi | 90% | 3376 fps | 97.7% |
| IMR 4451 Enduron | <<locked>> | 90% | 54,375 psi | 85% | 3314 fps | 97.5% |
| IMR 4831 | <<locked>> | 96% | 55,666 psi | 87% | 3383 fps | 99.6% |
| IMR 4895 | <<locked>> | 86% | 57,276 psi | 90% | 3412 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 56,115 psi | 88% | 3333 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 57,551 psi | 90% | 3360 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 56,231 psi | 88% | 3307 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 54,534 psi | 85% | 3310 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 54,128 psi | 85% | 3310 fps | 98.6% |
| Lovex S070 | <<locked>> | 94% | 55,361 psi | 87% | 3350 fps | 98% |
| Norma 201 | <<locked>> | 84% | 55,941 psi | 88% | 3327 fps | 100% |
| Norma 202 | <<locked>> | 84% | 56,579 psi | 89% | 3327 fps | 100% |
| Norma 203B | <<locked>> | 86% | 55,042 psi | 86% | 3363 fps | 99.9% |
| Norma MRPᴾ | <<locked>> | 100% | 52,634 psi | 82% | 3432 fps | 97.3% |
| Norma URP | <<locked>> | 94% | 53,983 psi | 85% | 3373 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 86% | 56,318 psi | 88% | 3392 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 96% | 57,000 psi | 89% | 3438 fps | 98.8% |
| Ramshot TAC | <<locked>> | 82% | 56,260 psi | 88% | 3346 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 82% | 56,362 psi | 88% | 3369 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,245 psi | 57% | 2198 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 57,116 psi | 90% | 3366 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 56,797 psi | 89% | 3455 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 57,290 psi | 90% | 3497 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 55,245 psi | 87% | 3412 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 54,230 psi | 85% | 3445 fps | 99.3% |
| Rottweil R 901 | <<locked>> | 82% | 56,130 psi | 88% | 3304 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 56,550 psi | 89% | 3327 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 56,463 psi | 88% | 3366 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 54,911 psi | 86% | 3396 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 92% | 56,231 psi | 88% | 3346 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 92% | 54,128 psi | 85% | 3310 fps | 98.6% |
| Shooters World Match Rifle | <<locked>> | 84% | 57,551 psi | 90% | 3360 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 54,534 psi | 85% | 3310 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 55,361 psi | 87% | 3350 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 54,766 psi | 86% | 3373 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 54,998 psi | 86% | 3323 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 55,796 psi | 87% | 3353 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 57,000 psi | 89% | 3261 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 54,302 psi | 85% | 3202 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 54,172 psi | 85% | 3255 fps | 97.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 54,418 psi | 85% | 3386 fps | 96.2% |
| Somchem S335 | <<locked>> | 84% | 56,623 psi | 89% | 3255 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 54,636 psi | 86% | 3310 fps | 99.9% |
| Somchem S355 | <<locked>> | 90% | 56,260 psi | 88% | 3360 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 57,029 psi | 89% | 3445 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 55,666 psi | 87% | 3369 fps | 97.4% |
| Vihtavuori N133 | <<locked>> | 84% | 57,464 psi | 90% | 3241 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 56,637 psi | 89% | 3287 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 57,276 psi | 90% | 3301 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 54,476 psi | 85% | 3281 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 56,478 psi | 89% | 3379 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 82% | 56,333 psi | 88% | 3327 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 55,463 psi | 87% | 3287 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 55,579 psi | 87% | 3379 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 51,938 psi | 81% | 3366 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 56,869 psi | 89% | 3346 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 57,087 psi | 89% | 3383 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 54,099 psi | 85% | 3386 fps | 97.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,843 psi | 66% | 3301 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 84% | 56,014 psi | 88% | 3360 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 2015 | <<locked>> | 80% | 54,114 psi | 85% | 3219 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 46,659 psi | 73% | 3123 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 48,965 psi | 77% | 3166 fps | 95.6% |
| Accurate 3100 | <<locked>> | 96% | 42,786 psi | 67% | 3110 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 44,164 psi | 69% | 3117 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 35,795 psi | 56% | 2972 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 50,401 psi | 79% | 3264 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 80% | 42,641 psi | 67% | 3081 fps | 98% |
| ADI AR 2209 | <<locked>> | 98% | 53,330 psi | 84% | 3366 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 52,533 psi | 82% | 3274 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 53,911 psi | 84% | 3255 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 46,775 psi | 73% | 3310 fps | 98.8% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 52,924 psi | 83% | 3356 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,815 psi | 67% | 3110 fps | 99.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,890 psi | 72% | 3186 fps | 98.7% |
| Alliant Reloder-16 | 43.3 gr | 82% | 35,317 psi | 55% | 2989 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,405 psi | 59% | 3071 fps | 97.8% |
| Alliant Reloder-19 | <<locked>> | 98% | 52,185 psi | 82% | 3343 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 88% | 31,067 psi | 49% | 2871 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 92% | 39,334 psi | 62% | 3166 fps | 96.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,299 psi | 79% | 3268 fps | 99.1% |
| Bofors RP3 | <<locked>> | 80% | 42,873 psi | 67% | 3114 fps | 99.2% |
| Bofors RP7 | <<locked>> | 86% | 46,267 psi | 73% | 3150 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 53,766 psi | 84% | 3251 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 52,214 psi | 82% | 3294 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 43,337 psi | 68% | 3117 fps | 97.2% |
| Hodgdon H414 | <<locked>> | 86% | 44,063 psi | 69% | 3176 fps | 95% |
| Hodgdon H4350 | <<locked>> | 88% | 50,459 psi | 79% | 3274 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 50,923 psi | 80% | 3278 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,501 psi | 48% | 2805 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 47,398 psi | 74% | 3241 fps | 99.8% |
| Hodgdon Superformance | 52.9 gr | 88% | 46,934 psi | 74% | 3264 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,556 psi | 42% | 1926 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,631 psi | 76% | 3215 fps | 99.7% |
| IMR 3031 | <<locked>> | 80% | 51,039 psi | 80% | 3268 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,802 psi | 70% | 3123 fps | 98.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,297 psi | 74% | 3153 fps | 96% |
| IMR 4350 | <<locked>> | 90% | 46,934 psi | 74% | 3179 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 84% | 44,976 psi | 70% | 3123 fps | 95.2% |
| IMR 4831 | <<locked>> | 84% | 37,115 psi | 58% | 2992 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 47,079 psi | 74% | 3222 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 80% | 52,533 psi | 82% | 3274 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 50,212 psi | 79% | 3235 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,632 psi | 78% | 3186 fps | 99.6% |
| Lovex S062 | <<locked>> | 80% | 44,831 psi | 70% | 3127 fps | 99.6% |
| Lovex S065 | <<locked>> | 82% | 39,291 psi | 62% | 2992 fps | 95% |
| Lovex S070 | <<locked>> | 88% | 45,600 psi | 71% | 3156 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 48,892 psi | 77% | 3202 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 49,806 psi | 78% | 3212 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,266 psi | 71% | 3173 fps | 99% |
| Norma MRP | <<locked>> | 96% | 45,411 psi | 71% | 3278 fps | 95.3% |
| Norma URP | <<locked>> | 82% | 35,897 psi | 56% | 2976 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 45,455 psi | 71% | 3186 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 88% | 43,149 psi | 68% | 3159 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 52,779 psi | 83% | 3281 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 52,794 psi | 83% | 3307 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,977 psi | 42% | 1972 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,613 psi | 68% | 3097 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,356 psi | 77% | 3317 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 39,842 psi | 62% | 3150 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 38,348 psi | 60% | 3058 fps | 95.8% |
| ReloadSwiss RS 70 | 49.7 gr | 86% | 40,669 psi | 64% | 3143 fps | 96.1% |
| Rottweil R 901 | <<locked>> | 80% | 52,866 psi | 83% | 3251 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 46,528 psi | 73% | 3146 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 40,089 psi | 63% | 3045 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 98% | 51,155 psi | 80% | 3323 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 86% | 46,267 psi | 73% | 3150 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 82% | 39,291 psi | 62% | 2992 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,212 psi | 79% | 3235 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,831 psi | 70% | 3127 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 45,600 psi | 71% | 3156 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,510 psi | 65% | 3107 fps | 98.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,140 psi | 80% | 3251 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,936 psi | 77% | 3225 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,038 psi | 78% | 3146 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,003 psi | 66% | 2986 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 44,106 psi | 69% | 3054 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 50,691 psi | 79% | 3317 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 49,690 psi | 78% | 3140 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,155 psi | 80% | 3248 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 40,611 psi | 64% | 3048 fps | 98.5% |
| Somchem S365 | <<locked>> | 80% | 29,820 psi | 47% | 2841 fps | 96.3% |
| Somchem S385 | <<locked>> | 96% | 48,501 psi | 76% | 3232 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 50,575 psi | 79% | 3136 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 46,543 psi | 73% | 3120 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,108 psi | 74% | 3133 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,827 psi | 61% | 2972 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 82% | 37,449 psi | 59% | 2982 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 52,968 psi | 83% | 3271 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 45,513 psi | 71% | 3114 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 36,782 psi | 58% | 2976 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 88% | 34,185 psi | 54% | 2966 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,534 psi | 54% | 2887 fps | 97.2% |
| Winchester 748 | <<locked>> | 80% | 53,345 psi | 84% | 3320 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 44,063 psi | 69% | 3176 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 92% | 31,502 psi | 49% | 2969 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 48,704 psi | 76% | 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 97 powders for .240 Weath. Mag. loaded with the .243 | 80gr | Osprey Virtus. Alliant Reloder-17 delivers the highest muzzle velocity at 3,497 fps; across all powders the maximum-charge window runs from 2,152 fps to 3,497 fps. Accurate 3100 gives the best case fill at 100 %, and 97 of the 97 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 1:9.5 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. Alliant Reloder-16, ReloadSwiss RS 70, Hodgdon Superformance rank at the top here: for .240 Weath. Mag. with the .243 | 80gr | Osprey Virtus 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.