Load Specifications
Load data in caliber .243 Ackley Improved with .243 | 82gr | Peregrine VLR-4 bullet and 70 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, ReloadSwiss RS 60 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% | 47,950 psi | 87% | 3077 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 48,196 psi | 87% | 3127 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 48,283 psi | 87% | 3199 fps | 98.4% |
| ADI AR 2206H | <<locked>> | 82% | 48,791 psi | 88% | 3156 fps | 99.2% |
| ADI AR 2208 | <<locked>> | 86% | 47,036 psi | 85% | 3100 fps | 98.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 48,167 psi | 87% | 3261 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 49,806 psi | 90% | 3179 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 84% | 47,050 psi | 85% | 3136 fps | 98.6% |
| Alliant Reloder-16 | <<locked>> | 96% | 49,806 psi | 90% | 3268 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 90% | 47,137 psi | 85% | 3235 fps | 99.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,582 psi | 73% | 3081 fps | 98.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,716 psi | 83% | 3258 fps | 97.7% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 48,327 psi | 87% | 3156 fps | 98.5% |
| Bofors RP3 | <<locked>> | 86% | 46,833 psi | 85% | 3130 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 86% | 48,008 psi | 87% | 3143 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 82% | 49,269 psi | 89% | 3166 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 49,400 psi | 89% | 3189 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 48,718 psi | 88% | 3199 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,230 psi | 64% | 2051 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 47,413 psi | 86% | 3117 fps | 99.3% |
| IMR 3031 | <<locked>> | 82% | 49,182 psi | 89% | 3166 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 49,472 psi | 90% | 3143 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 84% | 49,211 psi | 89% | 3107 fps | 95.9% |
| IMR 4451 Enduron | <<locked>> | 90% | 49,516 psi | 90% | 3140 fps | 95.9% |
| IMR 4831 | <<locked>> | 96% | 49,066 psi | 89% | 3192 fps | 98.6% |
| IMR 4895 | <<locked>> | 84% | 48,269 psi | 87% | 3173 fps | 99.2% |
| Lovex D073.6 | <<locked>> | 82% | 48,298 psi | 87% | 3130 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 48,399 psi | 88% | 3084 fps | 99.2% |
| Lovex S062 | <<locked>> | 86% | 49,284 psi | 89% | 3140 fps | 99.8% |
| Lovex S065 | <<locked>> | 92% | 48,878 psi | 88% | 3133 fps | 97.3% |
| Lovex S070 | <<locked>> | 94% | 49,661 psi | 90% | 3163 fps | 96.3% |
| Norma 201 | <<locked>> | 82% | 47,355 psi | 86% | 3094 fps | 99.7% |
| Norma 202 | <<locked>> | 82% | 47,906 psi | 87% | 3107 fps | 100% |
| Norma 203B | <<locked>> | 86% | 49,719 psi | 90% | 3189 fps | 99.4% |
| Norma URP | <<locked>> | 94% | 47,819 psi | 87% | 3189 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 86% | 50,009 psi | 90% | 3209 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 94% | 46,688 psi | 84% | 3173 fps | 96.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,636 psi | 64% | 2100 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 48,225 psi | 87% | 3120 fps | 96.4% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 46,905 psi | 85% | 3196 fps | 98.5% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 47,152 psi | 85% | 3248 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 48,167 psi | 87% | 3215 fps | 98.1% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 47,921 psi | 87% | 3241 fps | 97.7% |
| Rottweil R 902 | <<locked>> | 84% | 48,051 psi | 87% | 3100 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 88% | 47,007 psi | 85% | 3127 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 92% | 48,878 psi | 88% | 3133 fps | 97.3% |
| Shooters World Match Rifle | <<locked>> | 82% | 48,298 psi | 87% | 3130 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 49,284 psi | 89% | 3140 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 94% | 49,661 psi | 90% | 3163 fps | 96.3% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 48,791 psi | 88% | 3192 fps | 99.2% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 49,501 psi | 90% | 3143 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 47,181 psi | 85% | 3117 fps | 99% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 49,023 psi | 89% | 3051 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 49,545 psi | 90% | 3051 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 48,704 psi | 88% | 3071 fps | 95.8% |
| Somchem S335 | <<locked>> | 82% | 48,327 psi | 87% | 3041 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 49,226 psi | 89% | 3136 fps | 99.3% |
| Somchem S355 | <<locked>> | 88% | 47,442 psi | 86% | 3127 fps | 99.4% |
| Somchem S365 | <<locked>> | 98% | 49,182 psi | 89% | 3255 fps | 100% |
| Vihtavuori N133 | <<locked>> | 82% | 49,400 psi | 89% | 3041 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 47,935 psi | 87% | 3077 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 48,660 psi | 88% | 3087 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 48,747 psi | 88% | 3110 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 92% | 46,688 psi | 84% | 3127 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 84% | 47,036 psi | 85% | 3074 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 49,095 psi | 89% | 3189 fps | 98.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,744 psi | 81% | 3166 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 46,818 psi | 85% | 3100 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,158 psi | 65% | 3064 fps | 98% |
| Winchester StaBALL Match | <<locked>> | 82% | 47,021 psi | 85% | 3123 fps | 99.4% |
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% | 41,640 psi | 75% | 2963 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 39,421 psi | 71% | 2949 fps | 99.9% |
| Accurate 4350 | <<locked>> | 86% | 36,085 psi | 65% | 2927 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 45,513 psi | 82% | 3087 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 80% | 38,667 psi | 70% | 2913 fps | 96.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,771 psi | 76% | 3117 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,334 psi | 69% | 2936 fps | 98% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,162 psi | 74% | 3009 fps | 97.4% |
| Alliant Reloder-16 | <<locked>> | 86% | 36,056 psi | 65% | 2943 fps | 95% |
| Alliant Reloder-17 | 39.7 gr | 80% | 33,243 psi | 60% | 2887 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 94% | 33,330 psi | 60% | 2884 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 96% | 39,494 psi | 71% | 3107 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,107 psi | 82% | 3091 fps | 97.8% |
| Bofors RP3 | <<locked>> | 80% | 37,898 psi | 69% | 2933 fps | 98% |
| Hodgdon H380 | <<locked>> | 80% | 39,044 psi | 71% | 2946 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 45,977 psi | 83% | 3104 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 32,996 psi | 60% | 2822 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,206 psi | 76% | 3064 fps | 98.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,092 psi | 47% | 1837 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,208 psi | 80% | 3051 fps | 98.9% |
| IMR 3031 | <<locked>> | 80% | 45,992 psi | 83% | 3107 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,611 psi | 73% | 2956 fps | 97.3% |
| IMR 4166 Enduron | <<locked>> | 82% | 46,267 psi | 84% | 3048 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 46,296 psi | 84% | 3074 fps | 95% |
| IMR 4831 | <<locked>> | 88% | 37,231 psi | 67% | 2933 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 42,206 psi | 76% | 3045 fps | 98.2% |
| Lovex D073.6 | <<locked>> | 80% | 44,918 psi | 81% | 3068 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,513 psi | 82% | 3025 fps | 98.8% |
| Lovex S062 | <<locked>> | 80% | 40,466 psi | 73% | 2959 fps | 98.8% |
| Lovex S065 | <<locked>> | 88% | 42,873 psi | 78% | 3005 fps | 95.7% |
| Lovex S070 | <<locked>> | 92% | 46,369 psi | 84% | 3097 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 44,440 psi | 80% | 3038 fps | 99.4% |
| Norma 202 | <<locked>> | 80% | 44,933 psi | 81% | 3048 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,509 psi | 73% | 2995 fps | 97.7% |
| Norma URP | <<locked>> | 88% | 39,030 psi | 71% | 2995 fps | 95.9% |
| Ramshot Big Game | <<locked>> | 80% | 40,480 psi | 73% | 3012 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 92% | 43,555 psi | 79% | 3104 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,527 psi | 48% | 1883 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 45,049 psi | 82% | 3054 fps | 95.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,903 psi | 79% | 3136 fps | 98% |
| ReloadSwiss RS 60 | 39.7 gr | 80% | 35,462 psi | 64% | 2969 fps | 98.9% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 38,624 psi | 70% | 3009 fps | 95.5% |
| ReloadSwiss RS 70 | 45.3 gr | 90% | 41,350 psi | 75% | 3087 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 42,351 psi | 77% | 2982 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 80% | 35,592 psi | 64% | 2871 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 88% | 42,873 psi | 78% | 3005 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,918 psi | 81% | 3068 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,466 psi | 73% | 2959 fps | 98.8% |
| Shooters World SW4350 | <<locked>> | 92% | 46,369 psi | 84% | 3097 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,999 psi | 67% | 2933 fps | 96.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,166 psi | 84% | 3077 fps | 97.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,324 psi | 80% | 3054 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,963 psi | 83% | 2995 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,261 psi | 69% | 2838 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 45,658 psi | 83% | 3012 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 45,455 psi | 82% | 2989 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,905 psi | 83% | 3074 fps | 98.8% |
| Somchem S355 | <<locked>> | 80% | 36,477 psi | 66% | 2881 fps | 97.1% |
| Somchem S365 | <<locked>> | 82% | 28,326 psi | 51% | 2733 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 46,369 psi | 84% | 2989 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,989 psi | 76% | 2969 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,554 psi | 77% | 2972 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,722 psi | 63% | 2808 fps | 97.9% |
| Vihtavuori N160 | <<locked>> | 86% | 38,116 psi | 69% | 2936 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 41,249 psi | 75% | 2959 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 37,565 psi | 68% | 2933 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 94% | 36,274 psi | 66% | 2972 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,879 psi | 56% | 2713 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 96% | 31,647 psi | 57% | 2910 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,859 psi | 79% | 3058 fps | 98.9% |
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 70 powders for .243 Ackley Improved loaded with the .243 | 82gr | Peregrine VLR-4. Alliant Reloder-16 delivers the highest muzzle velocity at 3,268 fps; across all powders the maximum-charge window runs from 2,051 fps to 3,268 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 70 of the 70 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 82.0 gr projectile in 0.243" calls for a 1:8.0 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 70, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .243 Ackley Improved with the .243 | 82gr | Peregrine VLR-4 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.