Load Specifications
Load data in caliber .243 Ackley Improved with .243 | 80gr | Remington HP Power-Lokt bullet and 60 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-16, Somchem S365 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>> | 84% | 49,908 psi | 90% | 3143 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 47,021 psi | 85% | 3133 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 46,731 psi | 85% | 3196 fps | 98% |
| ADI AR 2208 | <<locked>> | 86% | 48,414 psi | 88% | 3159 fps | 98.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 49,777 psi | 90% | 3330 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 48,312 psi | 87% | 3186 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 84% | 48,588 psi | 88% | 3202 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 94% | 48,254 psi | 87% | 3268 fps | 98.6% |
| Alliant Reloder-17 | <<locked>> | 90% | 49,052 psi | 89% | 3307 fps | 99.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,047 psi | 76% | 3140 fps | 98.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,718 psi | 86% | 3333 fps | 98.1% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 49,966 psi | 90% | 3222 fps | 98.7% |
| Bofors RP3 | <<locked>> | 86% | 48,878 psi | 88% | 3202 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 86% | 49,458 psi | 90% | 3202 fps | 98% |
| Hodgdon H414 | <<locked>> | 92% | 49,545 psi | 90% | 3255 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 47,877 psi | 87% | 3196 fps | 99.4% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 46,847 psi | 85% | 3192 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,462 psi | 64% | 2087 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 48,515 psi | 88% | 3169 fps | 99.4% |
| IMR 4064 | <<locked>> | 84% | 47,587 psi | 86% | 3136 fps | 98.7% |
| IMR 4831 | <<locked>> | 94% | 47,688 psi | 86% | 3199 fps | 98.3% |
| IMR 4895 | <<locked>> | 84% | 49,850 psi | 90% | 3235 fps | 99.3% |
| Lovex S060 | <<locked>> | 82% | 49,850 psi | 90% | 3143 fps | 99.3% |
| Lovex S062 | <<locked>> | 84% | 47,659 psi | 86% | 3143 fps | 99.7% |
| Lovex S065 | <<locked>> | 90% | 47,398 psi | 86% | 3130 fps | 96.8% |
| Lovex S070 | <<locked>> | 92% | 48,095 psi | 87% | 3163 fps | 95.8% |
| Norma 201 | <<locked>> | 82% | 49,139 psi | 89% | 3159 fps | 99.8% |
| Norma 202 | <<locked>> | 82% | 49,574 psi | 90% | 3169 fps | 100% |
| Norma 203B | <<locked>> | 84% | 47,906 psi | 87% | 3186 fps | 99.1% |
| Norma URP | <<locked>> | 94% | 49,458 psi | 90% | 3251 fps | 98.4% |
| Ramshot Big Game | <<locked>> | 84% | 48,312 psi | 87% | 3205 fps | 99% |
| Ramshot Hunter | <<locked>> | 94% | 48,457 psi | 88% | 3235 fps | 96.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,216 psi | 66% | 2142 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 49,864 psi | 90% | 3182 fps | 96.6% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 48,892 psi | 88% | 3268 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 48,776 psi | 88% | 3314 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 46,427 psi | 84% | 3212 fps | 97.7% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 49,574 psi | 90% | 3307 fps | 98% |
| Rottweil R 902 | <<locked>> | 84% | 49,850 psi | 90% | 3163 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 88% | 48,704 psi | 88% | 3189 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 47,398 psi | 86% | 3130 fps | 96.8% |
| Shooters World Precision | <<locked>> | 84% | 47,659 psi | 86% | 3143 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 92% | 48,095 psi | 87% | 3163 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 47,181 psi | 85% | 3192 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 48,878 psi | 88% | 3179 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 47,630 psi | 86% | 3051 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 49,980 psi | 90% | 3104 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 49,023 psi | 89% | 3186 fps | 99.5% |
| Somchem S365 | <<locked>> | 96% | 47,674 psi | 86% | 3258 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 49,385 psi | 89% | 3136 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 46,949 psi | 85% | 3087 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 47,166 psi | 85% | 3114 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 92% | 48,327 psi | 87% | 3189 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 84% | 48,457 psi | 88% | 3133 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 47,732 psi | 86% | 3192 fps | 97.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,514 psi | 84% | 3232 fps | 98.5% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 48,399 psi | 88% | 3163 fps | 99.6% |
| Winchester 760 | <<locked>> | 92% | 49,545 psi | 90% | 3255 fps | 96% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,985 psi | 69% | 3146 fps | 98.6% |
| Winchester StaBALL Match | <<locked>> | 82% | 48,443 psi | 88% | 3182 fps | 99.5% |
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% | 44,005 psi | 80% | 3038 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 41,568 psi | 75% | 3025 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 37,826 psi | 68% | 2995 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 40,118 psi | 73% | 2979 fps | 96.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,134 psi | 78% | 3179 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,987 psi | 72% | 3005 fps | 98.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,786 psi | 77% | 3077 fps | 97.7% |
| Alliant Reloder-16 | 40.6 gr | 86% | 37,376 psi | 68% | 3005 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 34,635 psi | 63% | 2956 fps | 96.2% |
| Alliant Reloder-23 | <<locked>> | 92% | 32,590 psi | 59% | 2884 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 94% | 38,435 psi | 70% | 3104 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 46,485 psi | 84% | 3153 fps | 98% |
| Bofors RP3 | <<locked>> | 80% | 39,697 psi | 72% | 3005 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 80% | 40,350 psi | 73% | 3005 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 90% | 46,267 psi | 84% | 3186 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 32,314 psi | 58% | 2825 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 43,743 psi | 79% | 3127 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,556 psi | 48% | 1873 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,672 psi | 83% | 3110 fps | 99% |
| IMR 4064 | <<locked>> | 80% | 42,134 psi | 76% | 3022 fps | 97.6% |
| IMR 4831 | <<locked>> | 86% | 36,419 psi | 66% | 2940 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 43,845 psi | 79% | 3110 fps | 98.4% |
| Lovex S060 | <<locked>> | 80% | 46,673 psi | 84% | 3081 fps | 98.9% |
| Lovex S062 | <<locked>> | 80% | 41,901 psi | 76% | 3018 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 41,785 psi | 76% | 3009 fps | 95.2% |
| Lovex S070 | <<locked>> | 90% | 45,281 psi | 82% | 3104 fps | 95% |
| Norma 201 | <<locked>> | 80% | 46,253 psi | 84% | 3104 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 46,615 psi | 84% | 3114 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,148 psi | 76% | 3064 fps | 98% |
| Norma URP | <<locked>> | 86% | 38,000 psi | 69% | 2995 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 41,872 psi | 76% | 3071 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 92% | 45,310 psi | 82% | 3173 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,774 psi | 48% | 1916 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 46,673 psi | 84% | 3120 fps | 95.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 45,527 psi | 82% | 3202 fps | 98.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,840 psi | 67% | 3035 fps | 99.2% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 37,652 psi | 68% | 3009 fps | 95% |
| ReloadSwiss RS 70 | 45.5 gr | 88% | 40,219 psi | 73% | 3091 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 43,859 psi | 79% | 3045 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 80% | 37,434 psi | 68% | 2943 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 41,785 psi | 76% | 3009 fps | 95.2% |
| Shooters World Precision | <<locked>> | 80% | 41,901 psi | 76% | 3018 fps | 99% |
| Shooters World SW4350 | <<locked>> | 90% | 45,281 psi | 82% | 3104 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,450 psi | 70% | 2995 fps | 96.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,774 psi | 83% | 3117 fps | 98.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,523 psi | 72% | 2894 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 47,123 psi | 85% | 3054 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 38,174 psi | 69% | 2949 fps | 97.4% |
| Somchem S365 | 39.5 gr | 82% | 29,588 psi | 54% | 2799 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 80% | 43,540 psi | 79% | 3031 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,150 psi | 80% | 3035 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,303 psi | 66% | 2874 fps | 98.2% |
| Vihtavuori N160 | <<locked>> | 86% | 39,552 psi | 72% | 2999 fps | 95.9% |
| Vihtavuori N540 | <<locked>> | 80% | 42,453 psi | 77% | 3015 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 39,015 psi | 71% | 2995 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 92% | 35,505 psi | 64% | 2976 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,082 psi | 58% | 2776 fps | 95.5% |
| Winchester 760 | <<locked>> | 90% | 46,267 psi | 84% | 3186 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 96% | 33,228 psi | 60% | 2989 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,310 psi | 82% | 3120 fps | 99.1% |
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 60 powders for .243 Ackley Improved loaded with the .243 | 80gr | Remington HP Power-Lokt. Alliant Reloder-26 delivers the highest muzzle velocity at 3,333 fps; across all powders the maximum-charge window runs from 2,087 fps to 3,333 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 60 of the 60 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (381 MPa), the top charges use 64–90 %, leaving at least 10 % headroom. The 80.0 gr projectile in 0.243" calls for a 1:10.0 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. Alliant Reloder-16, Somchem S365, ReloadSwiss RS 70 rank at the top here: for .243 Ackley Improved with the .243 | 80gr | Remington HP Power-Lokt 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.