Load Specifications
Load data in caliber .243 WSSM with .243 | 70gr | Speer TNT bullet and 92 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 60 and Alliant Reloder-17.
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 2015 | <<locked>> | 86% | 55,956 psi | 88% | 3399 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,346 psi | 85% | 3415 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 54,259 psi | 85% | 3409 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 56,550 psi | 89% | 3484 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 54,447 psi | 85% | 3458 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 54,433 psi | 85% | 3520 fps | 98.2% |
| ADI AR 2206H | <<locked>> | 88% | 55,027 psi | 86% | 3488 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 94% | 56,289 psi | 88% | 3484 fps | 98.8% |
| ADI Benchmark 8208 | <<locked>> | 88% | 57,595 psi | 90% | 3497 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 86% | 54,433 psi | 85% | 3428 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,463 psi | 87% | 3566 fps | 99.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,940 psi | 86% | 3609 fps | 98.7% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 55,709 psi | 87% | 3504 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 56,188 psi | 88% | 3510 fps | 99.7% |
| Alliant Reloder-10x | <<locked>> | 82% | 55,187 psi | 86% | 3409 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 56,550 psi | 89% | 3533 fps | 99% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,156 psi | 82% | 3520 fps | 98.1% |
| Alliant Reloder-17 | <<locked>> | 98% | 57,334 psi | 90% | 3638 fps | 99.8% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 57,450 psi | 90% | 3366 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 55,042 psi | 86% | 3494 fps | 98.4% |
| Bofors RP3 | <<locked>> | 94% | 56,913 psi | 89% | 3527 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,840 psi | 88% | 3425 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 88% | 57,450 psi | 90% | 3530 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 55,172 psi | 86% | 3573 fps | 98.8% |
| Hodgdon H322 | <<locked>> | 82% | 54,534 psi | 85% | 3448 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,738 psi | 87% | 3468 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 54,302 psi | 85% | 3468 fps | 97.7% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 57,450 psi | 90% | 3573 fps | 96.2% |
| Hodgdon H4895 | <<locked>> | 88% | 55,535 psi | 87% | 3501 fps | 99.5% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,298 psi | 76% | 3376 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 55,071 psi | 86% | 3533 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,969 psi | 55% | 2215 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 56,884 psi | 89% | 3504 fps | 99.6% |
| IMR 3031 | <<locked>> | 88% | 55,230 psi | 87% | 3501 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,448 psi | 87% | 3461 fps | 98.9% |
| IMR 4198 | <<locked>> | 82% | 55,245 psi | 87% | 3369 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 51,459 psi | 81% | 3442 fps | 97.8% |
| IMR 4895 | <<locked>> | 90% | 54,621 psi | 86% | 3510 fps | 99.1% |
| IMR 8208 XBR | <<locked>> | 88% | 57,595 psi | 90% | 3497 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 82% | 54,317 psi | 85% | 3422 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 88% | 54,737 psi | 86% | 3465 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 54,868 psi | 86% | 3412 fps | 99.1% |
| Lovex S062 | <<locked>> | 92% | 55,158 psi | 86% | 3461 fps | 99.8% |
| Lovex S065 | <<locked>> | 98% | 54,766 psi | 86% | 3442 fps | 97% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,898 psi | 88% | 3478 fps | 96% |
| Norma 201 | <<locked>> | 90% | 57,159 psi | 90% | 3491 fps | 99.9% |
| Norma 202 | <<locked>> | 88% | 54,186 psi | 85% | 3438 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,724 psi | 87% | 3514 fps | 99.2% |
| Norma URPᴾ | <<locked>> | 100% | 53,519 psi | 84% | 3504 fps | 98% |
| Ramshot Big Game | <<locked>> | 92% | 56,695 psi | 89% | 3540 fps | 99.3% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,736 psi | 83% | 3491 fps | 96.2% |
| Ramshot TAC | <<locked>> | 86% | 54,795 psi | 86% | 3442 fps | 97.2% |
| Ramshot Wild Boar | <<locked>> | 86% | 54,172 psi | 85% | 3468 fps | 99% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,187 psi | 86% | 3435 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,317 psi | 55% | 2264 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 57,188 psi | 90% | 3484 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,708 psi | 86% | 3442 fps | 96.2% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 57,217 psi | 90% | 3612 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 57,014 psi | 89% | 3648 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 54,273 psi | 85% | 3537 fps | 98% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 54,302 psi | 85% | 3563 fps | 97.5% |
| Rottweil R 901 | <<locked>> | 86% | 54,679 psi | 86% | 3425 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 54,201 psi | 85% | 3425 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 96% | 56,739 psi | 89% | 3517 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,766 psi | 86% | 3442 fps | 97% |
| Shooters World Match Rifle | <<locked>> | 88% | 54,737 psi | 86% | 3465 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 55,158 psi | 86% | 3461 fps | 99.8% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,898 psi | 88% | 3478 fps | 96% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 56,884 psi | 89% | 3448 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 54,984 psi | 86% | 3520 fps | 99.1% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 56,115 psi | 88% | 3438 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 56,826 psi | 89% | 3481 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 57,290 psi | 90% | 3514 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,317 psi | 87% | 3376 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,434 psi | 87% | 3363 fps | 100% |
| Somchem S321 | <<locked>> | 84% | 55,695 psi | 87% | 3478 fps | 99.9% |
| Somchem S335 | <<locked>> | 88% | 54,766 psi | 86% | 3369 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 56,173 psi | 88% | 3471 fps | 99.2% |
| Somchem S355 | <<locked>> | 96% | 57,029 psi | 89% | 3514 fps | 99.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,747 psi | 75% | 3438 fps | 99.5% |
| Vihtavuori N130 | <<locked>> | 84% | 54,998 psi | 86% | 3343 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,419 psi | 87% | 3363 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 57,058 psi | 89% | 3451 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,868 psi | 86% | 3412 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 55,143 psi | 86% | 3432 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 56,246 psi | 88% | 3507 fps | 98.3% |
| Vihtavuori N530 | <<locked>> | 86% | 54,650 psi | 86% | 3442 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 92% | 56,855 psi | 89% | 3461 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 55,158 psi | 86% | 3504 fps | 98% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 57,101 psi | 89% | 3484 fps | 99.8% |
| Winchester 748 | <<locked>> | 86% | 54,505 psi | 85% | 3491 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 90% | 57,116 psi | 90% | 3520 fps | 99.6% |
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% | 46,180 psi | 72% | 3228 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,734 psi | 80% | 3350 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,769 psi | 61% | 3114 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,934 psi | 72% | 3291 fps | 99.6% |
| Accurate 4064 | <<locked>> | 80% | 36,637 psi | 57% | 3087 fps | 98.8% |
| Accurate 4350 | <<locked>> | 94% | 43,830 psi | 69% | 3307 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 42,627 psi | 67% | 3228 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 84% | 41,046 psi | 64% | 3166 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,686 psi | 70% | 3248 fps | 98.4% |
| Alliant AR-Comp | <<locked>> | 80% | 44,324 psi | 69% | 3258 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 52,098 psi | 82% | 3501 fps | 99.1% |
| Alliant Power Pro 2000-MR | 42 gr | 82% | 41,452 psi | 65% | 3301 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 43,163 psi | 68% | 3248 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,491 psi | 56% | 3058 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,880 psi | 81% | 3353 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 40,857 psi | 64% | 3199 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 94% | 43,134 psi | 68% | 3314 fps | 95.7% |
| Alliant Reloder-17 | 43.4 gr | 86% | 37,913 psi | 59% | 3202 fps | 95.7% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 53,954 psi | 85% | 3314 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,829 psi | 66% | 3215 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 35,230 psi | 55% | 3058 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,456 psi | 73% | 3248 fps | 99.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,497 psi | 68% | 3261 fps | 98.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,674 psi | 75% | 3422 fps | 97.5% |
| Hodgdon H322 | <<locked>> | 80% | 50,908 psi | 80% | 3386 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 52,127 psi | 82% | 3406 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 44,469 psi | 70% | 3268 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 98% | 53,998 psi | 85% | 3510 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 43,018 psi | 67% | 3245 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 37,260 psi | 58% | 3117 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,957 psi | 61% | 3189 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,063 psi | 41% | 1988 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,089 psi | 64% | 3182 fps | 96.9% |
| IMR 3031 | <<locked>> | 80% | 42,322 psi | 66% | 3258 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 40,524 psi | 64% | 3150 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 51,880 psi | 81% | 3317 fps | 100% |
| IMR 4831 | <<locked>> | 94% | 41,974 psi | 66% | 3241 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 39,349 psi | 62% | 3176 fps | 95.8% |
| IMR 8208 XBR | <<locked>> | 80% | 44,686 psi | 70% | 3248 fps | 98.4% |
| Lovex D073.5 | <<locked>> | 80% | 50,749 psi | 80% | 3356 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 80% | 41,394 psi | 65% | 3199 fps | 99% |
| Lovex S060 | <<locked>> | 80% | 42,656 psi | 67% | 3163 fps | 96.9% |
| Lovex S062 | <<locked>> | 80% | 37,724 psi | 59% | 3087 fps | 96.8% |
| Lovex S065 | <<locked>> | 94% | 48,240 psi | 76% | 3314 fps | 95.4% |
| Lovex S070 | <<locked>> | 98% | 52,228 psi | 82% | 3409 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 41,597 psi | 65% | 3176 fps | 97.8% |
| Norma 202 | <<locked>> | 80% | 41,742 psi | 65% | 3192 fps | 99.5% |
| Norma 203B | <<locked>> | 80% | 37,797 psi | 59% | 3123 fps | 95.2% |
| Norma URP | <<locked>> | 94% | 43,656 psi | 68% | 3301 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 82% | 40,001 psi | 63% | 3196 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 98% | 49,255 psi | 77% | 3419 fps | 95.2% |
| Ramshot TAC | <<locked>> | 82% | 47,805 psi | 75% | 3304 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,048 psi | 69% | 3261 fps | 97.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,515 psi | 76% | 3304 fps | 98% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,194 psi | 41% | 2031 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,009 psi | 78% | 3360 fps | 99.8% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 51,184 psi | 80% | 3376 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,885 psi | 63% | 3248 fps | 95.2% |
| ReloadSwiss RS 60 | 40.4 gr | 80% | 32,938 psi | 52% | 3068 fps | 96.2% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 43,772 psi | 69% | 3323 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 47,297 psi | 74% | 3415 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 45,353 psi | 71% | 3245 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 80% | 39,668 psi | 62% | 3117 fps | 97.3% |
| Rottweil R 903 | <<locked>> | 82% | 35,346 psi | 55% | 3051 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 94% | 48,240 psi | 76% | 3314 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,394 psi | 65% | 3199 fps | 99% |
| Shooters World Precision | <<locked>> | 80% | 37,724 psi | 59% | 3087 fps | 96.8% |
| Shooters World SW4350 | <<locked>> | 98% | 52,228 psi | 82% | 3409 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 53,171 psi | 83% | 3379 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 39,059 psi | 61% | 3179 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,649 psi | 83% | 3383 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 45,992 psi | 72% | 3268 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,075 psi | 64% | 3182 fps | 96.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,076 psi | 68% | 3146 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,723 psi | 56% | 2972 fps | 99.1% |
| Somchem S321 | <<locked>> | 80% | 48,414 psi | 76% | 3340 fps | 99.2% |
| Somchem S335 | <<locked>> | 80% | 42,598 psi | 67% | 3140 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 42,612 psi | 67% | 3202 fps | 96.7% |
| Somchem S355 | <<locked>> | 82% | 36,318 psi | 57% | 3068 fps | 95.3% |
| Somchem S365 | <<locked>> | 90% | 34,040 psi | 53% | 3094 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 48,718 psi | 76% | 3241 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,323 psi | 68% | 3146 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,885 psi | 61% | 3117 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,769 psi | 62% | 3120 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 80% | 32,387 psi | 51% | 2933 fps | 95.4% |
| Vihtavuori N160 | <<locked>> | 92% | 42,743 psi | 67% | 3238 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 44,715 psi | 70% | 3245 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 80% | 38,290 psi | 60% | 3094 fps | 98.8% |
| Vihtavuori N550 | <<locked>> | 94% | 45,266 psi | 71% | 3307 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 35,433 psi | 56% | 3015 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 44,280 psi | 69% | 3291 fps | 99% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,712 psi | 64% | 3186 fps | 96.9% |
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 109 powders for .243 WSSM loaded with the .243 | 70gr | Speer TNT. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,648 fps; across all powders the maximum-charge window runs from 2,215 fps to 3,648 fps. Accurate 3100 gives the best case fill at 100 %, and 109 of the 109 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 70.0 gr projectile in 0.243" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, Alliant Reloder-16 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 Power Pro 2000-MR, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .243 WSSM with the .243 | 70gr | Speer TNT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Accurate 3100, Alliant Reloder-26 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.