Load Specifications
Load data in caliber .243 Ackley Improved with .243 | 76gr | Norma Tipstrike bullet and 64 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, ReloadSwiss RS 70 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.
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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 84% | 48,515 psi | 88% | 3192 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 48,907 psi | 89% | 3241 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 48,515 psi | 88% | 3297 fps | 97.9% |
| ADI AR 2206H | <<locked>> | 82% | 48,834 psi | 88% | 3258 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 86% | 47,224 psi | 85% | 3205 fps | 98.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 48,341 psi | 87% | 3369 fps | 98.3% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 49,472 psi | 90% | 3278 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 47,036 psi | 85% | 3228 fps | 99.2% |
| Alliant Reloder-15 | <<locked>> | 84% | 47,340 psi | 86% | 3241 fps | 98.2% |
| Alliant Reloder-16 | <<locked>> | 94% | 46,876 psi | 85% | 3307 fps | 97.9% |
| Alliant Reloder-17 | <<locked>> | 90% | 47,442 psi | 86% | 3340 fps | 99.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,872 psi | 74% | 3176 fps | 97.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 46,151 psi | 84% | 3360 fps | 97.2% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 48,602 psi | 88% | 3261 fps | 98% |
| Bofors RP3 | <<locked>> | 86% | 47,442 psi | 86% | 3241 fps | 99.3% |
| Hodgdon H380 | <<locked>> | 86% | 48,153 psi | 87% | 3245 fps | 97.3% |
| Hodgdon H4895 | <<locked>> | 82% | 49,327 psi | 89% | 3271 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 49,676 psi | 90% | 3297 fps | 99.4% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 48,994 psi | 89% | 3307 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,433 psi | 64% | 2142 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 47,384 psi | 86% | 3219 fps | 99% |
| IMR 3031 | <<locked>> | 82% | 49,284 psi | 89% | 3274 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 49,661 psi | 90% | 3248 fps | 98.7% |
| IMR 4831 | <<locked>> | 96% | 49,429 psi | 89% | 3297 fps | 98.2% |
| IMR 4895 | <<locked>> | 84% | 48,515 psi | 88% | 3281 fps | 98.9% |
| Lovex D073.6 | <<locked>> | 82% | 48,689 psi | 88% | 3241 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 48,805 psi | 88% | 3192 fps | 98.9% |
| Lovex S062 | <<locked>> | 86% | 49,647 psi | 90% | 3251 fps | 99.7% |
| Lovex S065 | <<locked>> | 92% | 49,211 psi | 89% | 3235 fps | 96.7% |
| Norma 201 | <<locked>> | 82% | 47,993 psi | 87% | 3209 fps | 99.5% |
| Norma 202 | <<locked>> | 82% | 48,370 psi | 88% | 3219 fps | 100% |
| Norma 203B | <<locked>> | 86% | 49,879 psi | 90% | 3294 fps | 99.1% |
| Norma URP | <<locked>> | 94% | 47,877 psi | 87% | 3291 fps | 97.7% |
| Ramshot Big Game | <<locked>> | 84% | 46,847 psi | 85% | 3248 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,853 psi | 65% | 2192 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 47,369 psi | 86% | 3307 fps | 98.2% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 47,239 psi | 85% | 3350 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 48,298 psi | 87% | 3317 fps | 97.6% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 47,979 psi | 87% | 3333 fps | 97.1% |
| Rottweil R 902 | <<locked>> | 84% | 48,341 psi | 87% | 3205 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 88% | 47,268 psi | 86% | 3232 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 92% | 49,211 psi | 89% | 3235 fps | 96.7% |
| Shooters World Match Rifle | <<locked>> | 82% | 48,689 psi | 88% | 3241 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 49,647 psi | 90% | 3251 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 48,950 psi | 89% | 3297 fps | 98.9% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 49,951 psi | 90% | 3251 fps | 97.6% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 47,659 psi | 86% | 3225 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 49,284 psi | 89% | 3159 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 49,443 psi | 89% | 3153 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 48,921 psi | 89% | 3156 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 49,516 psi | 90% | 3241 fps | 99% |
| Somchem S355 | <<locked>> | 88% | 47,703 psi | 86% | 3232 fps | 99.1% |
| Somchem S365 | <<locked>> | 98% | 49,313 psi | 89% | 3360 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 82% | 49,574 psi | 90% | 3150 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 48,167 psi | 87% | 3189 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 48,936 psi | 89% | 3196 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 49,110 psi | 89% | 3219 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 92% | 46,804 psi | 85% | 3225 fps | 97.4% |
| Vihtavuori N540 | <<locked>> | 84% | 47,224 psi | 85% | 3179 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 49,414 psi | 89% | 3291 fps | 97.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 45,049 psi | 82% | 3268 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 47,224 psi | 85% | 3202 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,869 psi | 67% | 3163 fps | 97.5% |
| Winchester StaBALL Match | <<locked>> | 82% | 47,137 psi | 85% | 3225 fps | 99.1% |
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% | 42,525 psi | 77% | 3077 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 40,161 psi | 73% | 3064 fps | 99.8% |
| Accurate 4350 | <<locked>> | 88% | 39,320 psi | 71% | 3094 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 46,006 psi | 83% | 3199 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 80% | 38,928 psi | 70% | 3012 fps | 95.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,930 psi | 76% | 3219 fps | 96.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 46,630 psi | 84% | 3215 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,667 psi | 70% | 3038 fps | 97.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,698 psi | 75% | 3117 fps | 96.9% |
| Alliant Reloder-16 | <<locked>> | 88% | 38,885 psi | 70% | 3110 fps | 95.4% |
| Alliant Reloder-17 | 41.1 gr | 80% | 33,620 psi | 61% | 2982 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 94% | 33,721 psi | 61% | 2976 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 98% | 43,033 psi | 78% | 3284 fps | 96.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,252 psi | 82% | 3189 fps | 97.3% |
| Bofors RP3 | <<locked>> | 80% | 38,566 psi | 70% | 3045 fps | 97.6% |
| Hodgdon H380 | <<locked>> | 82% | 42,047 psi | 76% | 3110 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 46,485 psi | 84% | 3215 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 33,431 psi | 60% | 2917 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,511 psi | 77% | 3169 fps | 98.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,353 psi | 48% | 1923 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,338 psi | 80% | 3153 fps | 98.5% |
| IMR 3031 | <<locked>> | 80% | 45,905 psi | 83% | 3212 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,872 psi | 74% | 3058 fps | 96.8% |
| IMR 4831 | <<locked>> | 88% | 37,782 psi | 68% | 3038 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 42,743 psi | 77% | 3156 fps | 97.8% |
| Lovex D073.6 | <<locked>> | 80% | 45,469 psi | 82% | 3179 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 45,730 psi | 83% | 3130 fps | 98.4% |
| Lovex S062 | <<locked>> | 80% | 40,930 psi | 74% | 3064 fps | 98.5% |
| Lovex S065 | <<locked>> | 88% | 43,192 psi | 78% | 3107 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 44,918 psi | 81% | 3146 fps | 99.1% |
| Norma 202 | <<locked>> | 80% | 45,223 psi | 82% | 3156 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,089 psi | 74% | 3104 fps | 97.3% |
| Norma URP | <<locked>> | 88% | 39,218 psi | 71% | 3091 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 40,669 psi | 74% | 3107 fps | 97% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,803 psi | 49% | 1969 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,874 psi | 79% | 3232 fps | 97.4% |
| ReloadSwiss RS 60 | 41.1 gr | 80% | 35,795 psi | 65% | 3068 fps | 98.5% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 42,047 psi | 76% | 3179 fps | 96% |
| ReloadSwiss RS 70 | 46.9 gr | 90% | 41,698 psi | 75% | 3186 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 42,873 psi | 78% | 3091 fps | 98.8% |
| Rottweil R 903 | <<locked>> | 80% | 36,100 psi | 65% | 2972 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 43,192 psi | 78% | 3107 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 45,469 psi | 82% | 3179 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 40,930 psi | 74% | 3064 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,101 psi | 67% | 3025 fps | 95.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,398 psi | 84% | 3179 fps | 96.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,353 psi | 80% | 3153 fps | 98.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,021 psi | 83% | 3097 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,392 psi | 69% | 2933 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 45,803 psi | 83% | 3097 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,064 psi | 83% | 3173 fps | 98.4% |
| Somchem S355 | <<locked>> | 80% | 36,956 psi | 67% | 2982 fps | 96.6% |
| Somchem S365 | <<locked>> | 84% | 30,748 psi | 56% | 2897 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 46,354 psi | 84% | 3094 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,148 psi | 76% | 3074 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,786 psi | 77% | 3077 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,085 psi | 63% | 2907 fps | 97.5% |
| Vihtavuori N160 | <<locked>> | 88% | 41,075 psi | 74% | 3100 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 41,437 psi | 75% | 3061 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 40,422 psi | 73% | 3094 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 94% | 36,666 psi | 66% | 3068 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 33,518 psi | 61% | 2874 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 98% | 34,301 psi | 62% | 3074 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,106 psi | 80% | 3159 fps | 98.5% |
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 91 powders for .243 Ackley Improved loaded with the .243 | 76gr | Norma Tipstrike. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,369 fps; across all powders the maximum-charge window runs from 2,142 fps to 3,369 fps. Accurate 3100 gives the best case fill at 100 %, and 91 of the 91 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 76.0 gr projectile in 0.243" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-19, Alliant Reloder-23 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, ReloadSwiss RS 70, Alliant Reloder-17 rank at the top here: for .243 Ackley Improved with the .243 | 76gr | Norma Tipstrike they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Accurate 3100, ADI AR 2209 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.