Load Specifications
Load data in caliber .243 Ackley Improved with .243 | 75gr | Barnes BND SPIT-FIRE bullet and 67 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 60 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% | 47,166 psi | 85% | 3186 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 47,268 psi | 86% | 3228 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 46,862 psi | 85% | 3278 fps | 97.3% |
| ADI AR 2206H | <<locked>> | 82% | 47,674 psi | 86% | 3248 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 88% | 48,704 psi | 88% | 3245 fps | 98.2% |
| ADI Benchmark 8208 | <<locked>> | 82% | 49,850 psi | 90% | 3261 fps | 99.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 46,905 psi | 85% | 3350 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 48,733 psi | 88% | 3278 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 86% | 49,066 psi | 89% | 3291 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 96% | 48,443 psi | 88% | 3350 fps | 98% |
| Alliant Reloder-17 | <<locked>> | 92% | 49,400 psi | 89% | 3392 fps | 99.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,465 psi | 71% | 3150 fps | 97.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,324 psi | 80% | 3327 fps | 96.3% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 47,210 psi | 85% | 3245 fps | 97.5% |
| Bofors RP3 | <<locked>> | 88% | 48,863 psi | 88% | 3284 fps | 99.4% |
| Hodgdon BL-C2 | <<locked>> | 82% | 49,211 psi | 89% | 3284 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 88% | 49,995 psi | 90% | 3294 fps | 97.5% |
| Hodgdon H4895 | <<locked>> | 82% | 48,109 psi | 87% | 3261 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 47,848 psi | 87% | 3274 fps | 99% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 47,456 psi | 86% | 3291 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,317 psi | 64% | 2146 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 49,168 psi | 89% | 3264 fps | 99.1% |
| IMR 3031 | <<locked>> | 82% | 47,834 psi | 87% | 3264 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 48,196 psi | 87% | 3228 fps | 98.3% |
| IMR 4831 | <<locked>> | 96% | 47,601 psi | 86% | 3274 fps | 97.6% |
| IMR 4895 | <<locked>> | 84% | 47,311 psi | 86% | 3271 fps | 98.5% |
| IMR 8208 XBR | <<locked>> | 82% | 49,850 psi | 90% | 3261 fps | 99.5% |
| Lovex D073.6 | <<locked>> | 82% | 47,094 psi | 85% | 3225 fps | 99.9% |
| Lovex S060 | <<locked>> | 82% | 47,398 psi | 86% | 3176 fps | 98.5% |
| Lovex S062 | <<locked>> | 86% | 48,153 psi | 87% | 3232 fps | 99.4% |
| Lovex S065 | <<locked>> | 92% | 47,587 psi | 86% | 3212 fps | 96.1% |
| Norma 201 | <<locked>> | 84% | 49,734 psi | 90% | 3258 fps | 99.6% |
| Norma 202 | <<locked>> | 82% | 47,123 psi | 85% | 3209 fps | 100% |
| Norma 203B | <<locked>> | 86% | 48,341 psi | 87% | 3278 fps | 98.7% |
| Norma URP | <<locked>> | 96% | 49,443 psi | 89% | 3333 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 86% | 48,631 psi | 88% | 3297 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 82% | 49,632 psi | 90% | 3284 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,708 psi | 65% | 2195 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 49,124 psi | 89% | 3360 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 49,124 psi | 89% | 3402 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 49,922 psi | 90% | 3363 fps | 97.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 49,734 psi | 90% | 3383 fps | 97.2% |
| Rottweil R 902 | <<locked>> | 84% | 47,137 psi | 85% | 3196 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 90% | 49,081 psi | 89% | 3281 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 92% | 47,587 psi | 86% | 3212 fps | 96.1% |
| Shooters World Match Rifle | <<locked>> | 82% | 47,094 psi | 85% | 3225 fps | 99.9% |
| Shooters World Precision | <<locked>> | 86% | 48,153 psi | 87% | 3232 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 47,500 psi | 86% | 3281 fps | 98.5% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 48,530 psi | 88% | 3235 fps | 97% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 49,443 psi | 89% | 3274 fps | 98.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 48,051 psi | 87% | 3150 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 48,356 psi | 88% | 3146 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 47,442 psi | 86% | 3143 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 48,109 psi | 87% | 3228 fps | 98.6% |
| Somchem S355 | <<locked>> | 90% | 49,458 psi | 90% | 3281 fps | 99.2% |
| Somchem S365 | <<locked>> | 98% | 47,413 psi | 86% | 3337 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 82% | 48,356 psi | 88% | 3143 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 49,835 psi | 90% | 3235 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 47,442 psi | 86% | 3182 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 47,630 psi | 86% | 3205 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 94% | 48,660 psi | 88% | 3274 fps | 97.6% |
| Vihtavuori N540 | <<locked>> | 86% | 49,023 psi | 89% | 3225 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 47,703 psi | 86% | 3271 fps | 97.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,192 psi | 78% | 3245 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 48,950 psi | 89% | 3248 fps | 99.4% |
| Winchester 748 | <<locked>> | 82% | 49,850 psi | 90% | 3307 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 84% | 49,284 psi | 89% | 3281 fps | 99.2% |
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% | 41,176 psi | 75% | 3068 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 38,914 psi | 70% | 3051 fps | 99.6% |
| Accurate 4350 | <<locked>> | 90% | 40,451 psi | 73% | 3136 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 44,585 psi | 81% | 3179 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 80% | 37,913 psi | 69% | 2999 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,601 psi | 84% | 3196 fps | 99.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,596 psi | 73% | 3192 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,565 psi | 68% | 3022 fps | 97% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,263 psi | 73% | 3094 fps | 96.2% |
| Alliant Reloder-16 | 42.1 gr | 90% | 40,059 psi | 72% | 3150 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 82% | 34,795 psi | 63% | 3031 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 96% | 34,708 psi | 63% | 3015 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 98% | 41,292 psi | 75% | 3248 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,179 psi | 80% | 3179 fps | 96.8% |
| Bofors RP3 | <<locked>> | 80% | 37,405 psi | 68% | 3028 fps | 97% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,672 psi | 83% | 3215 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 82% | 40,988 psi | 74% | 3097 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 44,962 psi | 81% | 3196 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 34,592 psi | 63% | 2959 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,017 psi | 74% | 3150 fps | 98% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,353 psi | 48% | 1926 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,236 psi | 78% | 3140 fps | 98% |
| IMR 3031 | <<locked>> | 80% | 44,512 psi | 81% | 3202 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,798 psi | 72% | 3041 fps | 96.2% |
| IMR 4831 | <<locked>> | 90% | 39,102 psi | 71% | 3084 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 41,263 psi | 75% | 3133 fps | 97.1% |
| IMR 8208 XBR | <<locked>> | 80% | 46,601 psi | 84% | 3196 fps | 99.2% |
| Lovex D073.6 | <<locked>> | 80% | 43,903 psi | 79% | 3163 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 44,643 psi | 81% | 3117 fps | 98% |
| Lovex S062 | <<locked>> | 80% | 39,755 psi | 72% | 3051 fps | 98% |
| Lovex S065 | <<locked>> | 90% | 44,817 psi | 81% | 3153 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 43,714 psi | 79% | 3133 fps | 98.8% |
| Norma 202 | <<locked>> | 80% | 44,019 psi | 80% | 3146 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 39,682 psi | 72% | 3084 fps | 96.7% |
| Norma URP | <<locked>> | 90% | 40,611 psi | 73% | 3140 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 39,320 psi | 71% | 3087 fps | 96.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,441 psi | 84% | 3222 fps | 98.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,527 psi | 48% | 1969 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,540 psi | 77% | 3215 fps | 96.8% |
| ReloadSwiss RS 60 | 40.3 gr | 80% | 34,621 psi | 63% | 3045 fps | 97.8% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 40,350 psi | 73% | 3156 fps | 95.1% |
| ReloadSwiss RS 70 | 47.1 gr | 92% | 43,395 psi | 79% | 3235 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 41,713 psi | 75% | 3077 fps | 98.4% |
| Rottweil R 903 | <<locked>> | 80% | 34,998 psi | 63% | 2956 fps | 95.9% |
| Shooters World Long Rifle | <<locked>> | 90% | 44,817 psi | 81% | 3153 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,903 psi | 79% | 3163 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 39,755 psi | 72% | 3051 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,056 psi | 65% | 3012 fps | 95.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,034 psi | 81% | 3159 fps | 96.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,250 psi | 78% | 3143 fps | 97.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,860 psi | 81% | 3091 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,304 psi | 68% | 2923 fps | 99.7% |
| Somchem S335 | <<locked>> | 80% | 44,701 psi | 81% | 3091 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,947 psi | 81% | 3163 fps | 97.9% |
| Somchem S355 | <<locked>> | 80% | 35,853 psi | 65% | 2966 fps | 95.9% |
| Somchem S365 | <<locked>> | 86% | 31,734 psi | 57% | 2940 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 45,150 psi | 82% | 3087 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,857 psi | 74% | 3064 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,669 psi | 75% | 3068 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 34,069 psi | 62% | 2894 fps | 96.9% |
| Vihtavuori N160 | <<locked>> | 88% | 39,697 psi | 72% | 3077 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 40,364 psi | 73% | 3048 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 90% | 41,930 psi | 76% | 3143 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 96% | 37,637 psi | 68% | 3110 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 34,766 psi | 63% | 2917 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 46,499 psi | 84% | 3241 fps | 99.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,714 psi | 77% | 3143 fps | 98% |
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 67 powders for .243 Ackley Improved loaded with the .243 | 75gr | Barnes BND SPIT-FIRE. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,402 fps; across all powders the maximum-charge window runs from 2,146 fps to 3,402 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 67 of the 67 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 75.0 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. Alliant Reloder-16, ReloadSwiss RS 60, ReloadSwiss RS 70 rank at the top here: for .243 Ackley Improved with the .243 | 75gr | Barnes BND SPIT-FIRE 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.