Load Specifications
Load data in caliber .243 WSSM with .243 | 80gr | Hornady GMX bullet and 101 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-17 and Alliant Power Pro 2000-MR.
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% | 57,087 psi | 89% | 3219 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 55,288 psi | 87% | 3238 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 55,201 psi | 87% | 3232 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 57,740 psi | 90% | 3310 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 55,274 psi | 87% | 3219 fps | 95.9% |
| Accurate 4064 | <<locked>> | 92% | 55,288 psi | 87% | 3278 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 55,854 psi | 88% | 3363 fps | 99.1% |
| ADI AR 2206H | <<locked>> | 88% | 56,362 psi | 88% | 3323 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 94% | 57,566 psi | 90% | 3320 fps | 99.6% |
| ADI Benchmark 8208 | <<locked>> | 86% | 55,405 psi | 87% | 3271 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 56,057 psi | 88% | 3248 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 57,305 psi | 90% | 3399 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 56,420 psi | 88% | 3451 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 57,624 psi | 90% | 3346 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 56,318 psi | 88% | 3225 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 54,375 psi | 85% | 3307 fps | 99.4% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 53,621 psi | 84% | 3369 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 96% | 55,332 psi | 87% | 3419 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,000 psi | 60% | 3038 fps | 97.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,902 psi | 67% | 3219 fps | 96.3% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 56,637 psi | 89% | 3337 fps | 99.3% |
| Bofors RP3 | <<locked>> | 92% | 54,389 psi | 85% | 3297 fps | 99.9% |
| Bofors RP7 | <<locked>> | 96% | 54,897 psi | 86% | 3261 fps | 96.1% |
| Hodgdon Benchmark | <<locked>> | 86% | 57,159 psi | 90% | 3255 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 54,955 psi | 86% | 3301 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 57,203 psi | 90% | 3415 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 82% | 55,883 psi | 88% | 3268 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 57,101 psi | 89% | 3294 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 55,767 psi | 87% | 3314 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 98% | 55,448 psi | 87% | 3360 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 88% | 56,913 psi | 89% | 3337 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,705 psi | 78% | 3225 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 56,797 psi | 89% | 3369 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 56,681 psi | 89% | 3399 fps | 96.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,143 psi | 55% | 2064 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 54,882 psi | 86% | 3281 fps | 99.8% |
| IMR 3031 | <<locked>> | 88% | 57,014 psi | 89% | 3327 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 56,956 psi | 89% | 3301 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 90% | 56,985 psi | 89% | 3274 fps | 97.1% |
| IMR 4198 | <<locked>> | 82% | 56,608 psi | 89% | 3186 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 55,317 psi | 87% | 3284 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 96% | 57,043 psi | 89% | 3301 fps | 97% |
| IMR 4831ᴾ | <<locked>> | 100% | 52,721 psi | 83% | 3291 fps | 98.8% |
| IMR 4895 | <<locked>> | 90% | 55,782 psi | 87% | 3343 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 86% | 55,405 psi | 87% | 3271 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 55,434 psi | 87% | 3251 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 55,941 psi | 88% | 3291 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 55,898 psi | 88% | 3241 fps | 99.7% |
| Lovex S062 | <<locked>> | 92% | 56,594 psi | 89% | 3297 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 55,898 psi | 88% | 3284 fps | 98.1% |
| Lovex S070ᴾ | <<locked>> | 100% | 56,942 psi | 89% | 3320 fps | 97.3% |
| Norma 201 | <<locked>> | 88% | 54,737 psi | 86% | 3258 fps | 100% |
| Norma 202 | <<locked>> | 88% | 55,767 psi | 87% | 3271 fps | 100% |
| Norma 203B | <<locked>> | 92% | 57,464 psi | 90% | 3356 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 54,882 psi | 86% | 3350 fps | 99% |
| Ramshot Big Game | <<locked>> | 90% | 54,389 psi | 85% | 3314 fps | 99.5% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 53,925 psi | 85% | 3340 fps | 97.5% |
| Ramshot TAC | <<locked>> | 86% | 56,028 psi | 88% | 3284 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 86% | 55,477 psi | 87% | 3307 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 84% | 56,565 psi | 89% | 3271 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,520 psi | 56% | 2113 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 54,781 psi | 86% | 3251 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 56,260 psi | 88% | 3291 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 54,824 psi | 86% | 3379 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 54,882 psi | 86% | 3419 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 55,840 psi | 88% | 3386 fps | 99% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 55,782 psi | 87% | 3419 fps | 98.8% |
| Rottweil R 901 | <<locked>> | 86% | 55,448 psi | 87% | 3245 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 55,564 psi | 87% | 3261 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 54,230 psi | 85% | 3287 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 96% | 54,897 psi | 86% | 3261 fps | 96.1% |
| Shooters World Long Rifle | <<locked>> | 98% | 55,898 psi | 88% | 3284 fps | 98.1% |
| Shooters World Match Rifle | <<locked>> | 88% | 55,941 psi | 88% | 3291 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 56,594 psi | 89% | 3297 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 56,942 psi | 89% | 3320 fps | 97.3% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 56,565 psi | 89% | 3360 fps | 99.7% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 57,464 psi | 90% | 3255 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 54,317 psi | 85% | 3258 fps | 98.4% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 54,795 psi | 86% | 3284 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 56,536 psi | 89% | 3202 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 56,913 psi | 89% | 3196 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 56,637 psi | 89% | 3235 fps | 97% |
| Somchem S321 | <<locked>> | 84% | 56,811 psi | 89% | 3307 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 55,724 psi | 87% | 3192 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 53,882 psi | 84% | 3248 fps | 99.5% |
| Somchem S355 | <<locked>> | 94% | 54,520 psi | 85% | 3284 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,371 psi | 77% | 3291 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 56,275 psi | 88% | 3166 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 56,782 psi | 89% | 3186 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 55,143 psi | 86% | 3225 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 56,318 psi | 88% | 3241 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 56,318 psi | 88% | 3264 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 57,696 psi | 90% | 3350 fps | 99.2% |
| Vihtavuori N530 | <<locked>> | 86% | 55,869 psi | 88% | 3268 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 54,360 psi | 85% | 3232 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 56,681 psi | 89% | 3353 fps | 99% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,437 psi | 65% | 3130 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 54,636 psi | 86% | 3264 fps | 99.9% |
| Winchester 748 | <<locked>> | 86% | 55,796 psi | 87% | 3320 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 55,448 psi | 87% | 3360 fps | 96.9% |
| Winchester StaBALL Match | <<locked>> | 88% | 54,810 psi | 86% | 3294 fps | 99.8% |
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% | 46,862 psi | 73% | 3054 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 51,837 psi | 81% | 3182 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,175 psi | 61% | 2946 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,717 psi | 73% | 3123 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 51,851 psi | 81% | 3159 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 37,101 psi | 58% | 2930 fps | 99.6% |
| Accurate 4350 | <<locked>> | 90% | 38,827 psi | 61% | 3022 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 43,352 psi | 68% | 3071 fps | 98% |
| ADI AR 2208 | <<locked>> | 80% | 37,014 psi | 58% | 2897 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,455 psi | 71% | 3087 fps | 99.3% |
| Alliant AR-Comp | <<locked>> | 80% | 45,498 psi | 71% | 3084 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 53,229 psi | 83% | 3327 fps | 99.7% |
| Alliant Power Pro 2000-MR | 39.1 gr | 80% | 39,465 psi | 62% | 3084 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,245 psi | 57% | 2913 fps | 97% |
| Alliant Reloder-10x | <<locked>> | 80% | 53,113 psi | 83% | 3176 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,015 psi | 61% | 2989 fps | 96.3% |
| Alliant Reloder-16 | <<locked>> | 90% | 39,059 psi | 61% | 3048 fps | 95.7% |
| Alliant Reloder-17 | 39.5 gr | 82% | 33,692 psi | 53% | 2927 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 96% | 33,388 psi | 52% | 2907 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 98% | 39,813 psi | 62% | 3136 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,743 psi | 67% | 3068 fps | 96.8% |
| Bofors RP3 | <<locked>> | 80% | 35,752 psi | 56% | 2910 fps | 97% |
| Bofors RP7 | <<locked>> | 94% | 51,474 psi | 81% | 3196 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,413 psi | 74% | 3084 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,324 psi | 69% | 3104 fps | 99.4% |
| Hodgdon CFE223 | <<locked>> | 80% | 49,472 psi | 78% | 3274 fps | 98.7% |
| Hodgdon H322 | <<locked>> | 80% | 52,286 psi | 82% | 3212 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 53,592 psi | 84% | 3238 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 39,566 psi | 62% | 2986 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 94% | 48,254 psi | 76% | 3225 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 43,729 psi | 69% | 3084 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 33,402 psi | 52% | 2858 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,001 psi | 63% | 3045 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 96% | 52,649 psi | 83% | 3327 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,049 psi | 41% | 1847 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,119 psi | 66% | 3031 fps | 98.2% |
| IMR 3031 | <<locked>> | 80% | 43,381 psi | 68% | 3094 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,841 psi | 61% | 2940 fps | 96.4% |
| IMR 4166 Enduron | <<locked>> | 86% | 50,314 psi | 79% | 3153 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 53,388 psi | 84% | 3140 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 51,895 psi | 81% | 3225 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 92% | 50,343 psi | 79% | 3179 fps | 95.5% |
| IMR 4831 | <<locked>> | 90% | 37,681 psi | 59% | 2976 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 39,987 psi | 63% | 3022 fps | 97.2% |
| IMR 8208 XBR | <<locked>> | 80% | 45,455 psi | 71% | 3087 fps | 99.3% |
| Lovex D073.5 | <<locked>> | 80% | 51,605 psi | 81% | 3189 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 42,554 psi | 67% | 3051 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 43,468 psi | 68% | 3005 fps | 98.1% |
| Lovex S062 | <<locked>> | 80% | 38,363 psi | 60% | 2940 fps | 98% |
| Lovex S065 | <<locked>> | 90% | 43,337 psi | 68% | 3041 fps | 95.3% |
| Lovex S070 | <<locked>> | 94% | 46,978 psi | 74% | 3136 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 42,250 psi | 66% | 3018 fps | 98.8% |
| Norma 202 | <<locked>> | 80% | 42,670 psi | 67% | 3035 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 38,421 psi | 60% | 2972 fps | 96.7% |
| Norma URP | <<locked>> | 90% | 39,233 psi | 61% | 3031 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 38,101 psi | 60% | 2982 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 94% | 44,121 psi | 69% | 3143 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 45,614 psi | 71% | 3087 fps | 96.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,281 psi | 71% | 3114 fps | 98.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,342 psi | 77% | 3143 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,208 psi | 41% | 1890 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 51,401 psi | 81% | 3192 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 45,905 psi | 72% | 3097 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,046 psi | 64% | 3100 fps | 96.8% |
| ReloadSwiss RS 60 | 38.5 gr | 80% | 33,417 psi | 52% | 2936 fps | 97.9% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 38,856 psi | 61% | 3045 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 42,003 psi | 66% | 3127 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 46,122 psi | 72% | 3081 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,190 psi | 63% | 2963 fps | 98.4% |
| Rottweil R 903 | <<locked>> | 80% | 33,504 psi | 53% | 2844 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 94% | 51,474 psi | 81% | 3196 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 90% | 43,337 psi | 68% | 3041 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,554 psi | 67% | 3051 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 38,363 psi | 60% | 2940 fps | 98% |
| Shooters World SW4350 | <<locked>> | 94% | 46,978 psi | 74% | 3136 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,795 psi | 55% | 2900 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 53,795 psi | 84% | 3199 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,729 psi | 69% | 3051 fps | 96.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,974 psi | 66% | 3035 fps | 97.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,758 psi | 69% | 2982 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,274 psi | 57% | 2818 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 49,603 psi | 78% | 3110 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 49,356 psi | 77% | 3176 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 43,352 psi | 68% | 2979 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,482 psi | 68% | 3051 fps | 98% |
| Somchem S355 | <<locked>> | 80% | 34,490 psi | 54% | 2858 fps | 95.9% |
| Somchem S365 | <<locked>> | 86% | 30,516 psi | 48% | 2831 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 49,472 psi | 78% | 3061 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,092 psi | 69% | 2979 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,566 psi | 62% | 2953 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,422 psi | 63% | 2959 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 32,808 psi | 51% | 2785 fps | 96.9% |
| Vihtavuori N160 | <<locked>> | 88% | 38,363 psi | 60% | 2972 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 45,542 psi | 71% | 3084 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 80% | 38,928 psi | 61% | 2940 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 90% | 40,350 psi | 63% | 3028 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 96% | 36,056 psi | 56% | 2999 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 33,649 psi | 53% | 2818 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 45,527 psi | 71% | 3136 fps | 99.7% |
| Winchester 760 | <<locked>> | 94% | 48,254 psi | 76% | 3225 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,437 psi | 65% | 3035 fps | 98.1% |
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 112 powders for .243 WSSM loaded with the .243 | 80gr | Hornady GMX. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,451 fps; across all powders the maximum-charge window runs from 2,064 fps to 3,451 fps. Accurate 3100 gives the best case fill at 100 %, and 112 of the 112 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 80.0 gr projectile in 0.243" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, ADI AR 2209 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 60, Alliant Reloder-17, Alliant Power Pro 2000-MR rank at the top here: for .243 WSSM with the .243 | 80gr | Hornady GMX they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, ADI AR 2209, Alliant Reloder-19 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.