Load Specifications
Load data in caliber .243 Ackley Improved with .243 | 77gr | CutEdge MTH bullet and 69 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-16 and ReloadSwiss RS 70.
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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 86% | 49,850 psi | 90% | 3205 fps | 100% |
| Accurate 4064 | <<locked>> | 88% | 49,995 psi | 90% | 3251 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 46,557 psi | 84% | 3248 fps | 97.5% |
| ADI AR 2206H | <<locked>> | 82% | 47,442 psi | 86% | 3215 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 88% | 48,921 psi | 89% | 3225 fps | 98.5% |
| ADI Benchmark 8208 | <<locked>> | 82% | 49,705 psi | 90% | 3232 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 46,775 psi | 85% | 3320 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 48,544 psi | 88% | 3245 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 86% | 49,182 psi | 89% | 3268 fps | 98.6% |
| Alliant Reloder-16 | <<locked>> | 96% | 48,631 psi | 88% | 3327 fps | 98.3% |
| Alliant Reloder-17 | <<locked>> | 92% | 49,284 psi | 89% | 3363 fps | 99.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,407 psi | 71% | 3127 fps | 97.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,382 psi | 80% | 3304 fps | 96.7% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 47,094 psi | 85% | 3215 fps | 97.8% |
| Bofors RP3 | <<locked>> | 88% | 48,878 psi | 88% | 3255 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 82% | 48,950 psi | 89% | 3251 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 88% | 49,705 psi | 90% | 3261 fps | 97.7% |
| Hodgdon H4895 | <<locked>> | 82% | 47,877 psi | 87% | 3228 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 48,066 psi | 87% | 3251 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 47,355 psi | 86% | 3258 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,041 psi | 63% | 2119 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 49,385 psi | 89% | 3241 fps | 99.3% |
| IMR 3031 | <<locked>> | 82% | 47,703 psi | 86% | 3232 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 48,051 psi | 87% | 3199 fps | 98.5% |
| IMR 4831 | <<locked>> | 96% | 47,718 psi | 86% | 3251 fps | 97.9% |
| IMR 4895 | <<locked>> | 84% | 47,094 psi | 85% | 3238 fps | 98.7% |
| IMR 8208 XBR | <<locked>> | 82% | 49,705 psi | 90% | 3232 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 82% | 46,702 psi | 85% | 3189 fps | 99.9% |
| Lovex S060 | <<locked>> | 82% | 47,558 psi | 86% | 3150 fps | 98.8% |
| Lovex S062 | <<locked>> | 86% | 47,834 psi | 87% | 3202 fps | 99.5% |
| Lovex S065 | <<locked>> | 92% | 47,572 psi | 86% | 3186 fps | 96.4% |
| Norma 201 | <<locked>> | 84% | 49,356 psi | 89% | 3222 fps | 99.7% |
| Norma 202 | <<locked>> | 84% | 49,893 psi | 90% | 3232 fps | 100% |
| Norma 203B | <<locked>> | 86% | 48,428 psi | 88% | 3251 fps | 98.9% |
| Norma URP | <<locked>> | 96% | 49,647 psi | 90% | 3310 fps | 98.1% |
| Ramshot Big Game | <<locked>> | 86% | 48,863 psi | 88% | 3274 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 96% | 48,646 psi | 88% | 3291 fps | 96.3% |
| Ramshot TAC | <<locked>> | 82% | 49,980 psi | 90% | 3232 fps | 97.1% |
| Ramshot Wild Boar | <<locked>> | 82% | 49,487 psi | 90% | 3255 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,694 psi | 65% | 2172 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 49,037 psi | 89% | 3330 fps | 98.5% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 49,037 psi | 89% | 3373 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 46,673 psi | 84% | 3268 fps | 97.3% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 49,966 psi | 90% | 3363 fps | 97.6% |
| Rottweil R 902 | <<locked>> | 84% | 46,760 psi | 85% | 3159 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 90% | 48,747 psi | 88% | 3245 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 92% | 47,572 psi | 86% | 3186 fps | 96.4% |
| Shooters World Match Rifle | <<locked>> | 82% | 46,702 psi | 85% | 3189 fps | 99.9% |
| Shooters World Precision | <<locked>> | 86% | 47,834 psi | 87% | 3202 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 47,355 psi | 86% | 3248 fps | 98.7% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 48,240 psi | 87% | 3202 fps | 97.3% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 49,269 psi | 89% | 3245 fps | 99% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 47,848 psi | 87% | 3120 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 48,153 psi | 87% | 3117 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 47,427 psi | 86% | 3114 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 47,935 psi | 87% | 3199 fps | 98.7% |
| Somchem S355 | <<locked>> | 90% | 49,168 psi | 89% | 3245 fps | 99.3% |
| Somchem S365 | <<locked>> | 98% | 47,630 psi | 86% | 3310 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 82% | 48,225 psi | 87% | 3114 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 49,632 psi | 90% | 3199 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 47,587 psi | 86% | 3156 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 47,398 psi | 86% | 3173 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 94% | 48,530 psi | 88% | 3245 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 86% | 49,124 psi | 89% | 3202 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 47,776 psi | 86% | 3245 fps | 97.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,236 psi | 78% | 3219 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 49,153 psi | 89% | 3225 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,230 psi | 64% | 3100 fps | 96.8% |
| Winchester StaBALL Match | <<locked>> | 84% | 49,110 psi | 89% | 3251 fps | 99.3% |
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% | 40,335 psi | 73% | 3022 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 38,159 psi | 69% | 3005 fps | 99.6% |
| Accurate 4350 | <<locked>> | 90% | 40,335 psi | 73% | 3110 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 44,599 psi | 81% | 3153 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 80% | 37,666 psi | 68% | 2969 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,760 psi | 85% | 3173 fps | 99.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,669 psi | 74% | 3169 fps | 96.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,217 psi | 67% | 2992 fps | 97.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,248 psi | 73% | 3071 fps | 96.6% |
| Alliant Reloder-16 | 42.3 gr | 90% | 40,118 psi | 73% | 3130 fps | 95.9% |
| Alliant Reloder-17 | <<locked>> | 82% | 34,722 psi | 63% | 3005 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 96% | 34,577 psi | 63% | 2992 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 41,292 psi | 75% | 3228 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,990 psi | 80% | 3150 fps | 97% |
| Bofors RP3 | <<locked>> | 80% | 36,912 psi | 67% | 2989 fps | 97.2% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,701 psi | 83% | 3189 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 82% | 40,582 psi | 73% | 3061 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 45,005 psi | 81% | 3169 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 34,243 psi | 62% | 2930 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,118 psi | 74% | 3127 fps | 98.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,078 psi | 47% | 1900 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,033 psi | 78% | 3107 fps | 98.3% |
| IMR 3031 | <<locked>> | 80% | 44,657 psi | 81% | 3176 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,537 psi | 72% | 3012 fps | 96.4% |
| IMR 4831 | <<locked>> | 90% | 38,783 psi | 70% | 3051 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 41,234 psi | 75% | 3107 fps | 97.5% |
| IMR 8208 XBR | <<locked>> | 80% | 46,760 psi | 85% | 3173 fps | 99.4% |
| Lovex D073.6 | <<locked>> | 80% | 43,468 psi | 79% | 3123 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 44,440 psi | 80% | 3087 fps | 98.2% |
| Lovex S062 | <<locked>> | 80% | 39,392 psi | 71% | 3015 fps | 98.2% |
| Lovex S065 | <<locked>> | 90% | 44,454 psi | 80% | 3120 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 43,294 psi | 78% | 3097 fps | 98.9% |
| Norma 202 | <<locked>> | 80% | 43,743 psi | 79% | 3114 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 39,624 psi | 72% | 3054 fps | 97% |
| Norma URP | <<locked>> | 90% | 40,393 psi | 73% | 3110 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 39,349 psi | 71% | 3064 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 94% | 45,440 psi | 82% | 3225 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 46,804 psi | 85% | 3166 fps | 96.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,238 psi | 84% | 3189 fps | 98.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,208 psi | 47% | 1942 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,380 psi | 77% | 3182 fps | 97% |
| ReloadSwiss RS 60 | 40.5 gr | 80% | 34,519 psi | 62% | 3018 fps | 98.1% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 40,350 psi | 73% | 3130 fps | 95.5% |
| ReloadSwiss RS 70 | 47.2 gr | 92% | 43,178 psi | 78% | 3209 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 41,249 psi | 75% | 3045 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 80% | 34,461 psi | 62% | 2920 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 90% | 44,454 psi | 80% | 3120 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,468 psi | 79% | 3123 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 39,392 psi | 71% | 3015 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,781 psi | 65% | 2979 fps | 95.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,991 psi | 81% | 3133 fps | 96.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,047 psi | 78% | 3110 fps | 97.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,933 psi | 81% | 3061 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,318 psi | 68% | 2897 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 44,338 psi | 80% | 3054 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,773 psi | 81% | 3133 fps | 98.2% |
| Somchem S355 | <<locked>> | 80% | 35,447 psi | 64% | 2933 fps | 96.1% |
| Somchem S365 | <<locked>> | 86% | 31,343 psi | 57% | 2904 fps | 95.9% |
| Vihtavuori N133 | <<locked>> | 80% | 45,295 psi | 82% | 3058 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,814 psi | 74% | 3035 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,408 psi | 75% | 3035 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 33,692 psi | 61% | 2861 fps | 97.1% |
| Vihtavuori N160 | <<locked>> | 88% | 39,494 psi | 71% | 3048 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 40,059 psi | 72% | 3015 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 90% | 41,626 psi | 75% | 3110 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 96% | 37,565 psi | 68% | 3084 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 34,664 psi | 63% | 2894 fps | 96.1% |
| Winchester StaBALL HD | <<locked>> | 98% | 32,909 psi | 60% | 3015 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,772 psi | 77% | 3120 fps | 98.3% |
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 69 powders for .243 Ackley Improved loaded with the .243 | 77gr | CutEdge MTH. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,373 fps; across all powders the maximum-charge window runs from 2,119 fps to 3,373 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 69 of the 69 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (381 MPa), the top charges use 63–90 %, leaving at least 10 % headroom. The 77.0 gr projectile in 0.243" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-26, Hodgdon TrailBoss 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-16, ReloadSwiss RS 70 rank at the top here: for .243 Ackley Improved with the .243 | 77gr | CutEdge MTH 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.