Load Specifications
Load data in caliber .243 Ackley Improved with .245 | 92gr | Peregrine VLR-4 bullet and 62 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 70 and Alliant Reloder-26.
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>> | 82% | 47,935 psi | 87% | 2913 fps | 100% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,021 psi | 83% | 2972 fps | 97.4% |
| Accurate 4064 | <<locked>> | 84% | 48,385 psi | 88% | 2966 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 48,327 psi | 87% | 3041 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 86% | 49,806 psi | 90% | 2999 fps | 99.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 48,080 psi | 87% | 3104 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 49,879 psi | 90% | 3022 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 46,992 psi | 85% | 2982 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 94% | 49,893 psi | 90% | 3114 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 88% | 47,079 psi | 85% | 3077 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,526 psi | 79% | 3002 fps | 99.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,734 psi | 90% | 3196 fps | 99.4% |
| Bofors RP3 | <<locked>> | 84% | 46,673 psi | 84% | 2969 fps | 99.9% |
| Bofors RP7 | <<locked>> | 88% | 47,166 psi | 85% | 2943 fps | 96% |
| Hodgdon H380 | <<locked>> | 84% | 47,747 psi | 86% | 2986 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 90% | 47,935 psi | 87% | 3041 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 49,763 psi | 90% | 3038 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 48,617 psi | 88% | 3035 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 47,688 psi | 86% | 3061 fps | 96.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,795 psi | 65% | 1942 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 49,182 psi | 89% | 2979 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 82% | 48,820 psi | 88% | 2949 fps | 96.9% |
| IMR 4350 | <<locked>> | 92% | 47,921 psi | 87% | 2976 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 88% | 49,139 psi | 89% | 2982 fps | 96.9% |
| IMR 4831 | <<locked>> | 94% | 49,037 psi | 89% | 3038 fps | 99.3% |
| IMR 4895 | <<locked>> | 82% | 48,225 psi | 87% | 3015 fps | 99.7% |
| Lovex S062 | <<locked>> | 84% | 49,110 psi | 89% | 2976 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 48,660 psi | 88% | 2979 fps | 98.2% |
| Lovex S070 | <<locked>> | 92% | 49,327 psi | 89% | 3009 fps | 97.3% |
| Norma 203B | <<locked>> | 84% | 49,356 psi | 89% | 3025 fps | 99.8% |
| Norma MRPᴾ | <<locked>> | 100% | 49,023 psi | 89% | 3143 fps | 97.1% |
| Norma URP | <<locked>> | 92% | 47,703 psi | 86% | 3031 fps | 99% |
| Ramshot Big Game | <<locked>> | 84% | 49,719 psi | 90% | 3045 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 94% | 49,879 psi | 90% | 3084 fps | 98.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,289 psi | 66% | 1988 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 47,979 psi | 87% | 2966 fps | 97.4% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 46,978 psi | 85% | 3084 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 48,153 psi | 87% | 3064 fps | 98.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 47,630 psi | 86% | 3091 fps | 98.7% |
| Rottweil R 902 | <<locked>> | 82% | 47,718 psi | 86% | 2936 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 46,905 psi | 85% | 2966 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 88% | 47,166 psi | 85% | 2943 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 90% | 48,660 psi | 88% | 2979 fps | 98.2% |
| Shooters World Precision | <<locked>> | 84% | 49,110 psi | 89% | 2976 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 49,327 psi | 89% | 3009 fps | 97.3% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 48,515 psi | 88% | 3028 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 49,139 psi | 89% | 2884 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 48,414 psi | 88% | 2923 fps | 96.9% |
| Somchem S355 | <<locked>> | 86% | 47,471 psi | 86% | 2972 fps | 99.8% |
| Somchem S365 | <<locked>> | 96% | 49,530 psi | 90% | 3097 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 49,052 psi | 89% | 3028 fps | 96.5% |
| Vihtavuori N135 | <<locked>> | 82% | 47,645 psi | 86% | 2907 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 48,443 psi | 88% | 2923 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 48,501 psi | 88% | 2949 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 49,966 psi | 90% | 3035 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 82% | 46,630 psi | 84% | 2910 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 49,037 psi | 89% | 3035 fps | 99% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,457 psi | 88% | 3084 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 49,792 psi | 90% | 3005 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 47,935 psi | 87% | 3041 fps | 96.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,030 psi | 71% | 3018 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 82% | 49,835 psi | 90% | 3018 fps | 99.9% |
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% | 44,831 psi | 81% | 2861 fps | 100% |
| Accurate 3100 | <<locked>> | 96% | 40,016 psi | 72% | 2848 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 42,424 psi | 77% | 2858 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 33,808 psi | 61% | 2723 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 41,133 psi | 74% | 2825 fps | 98.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,686 psi | 81% | 3035 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,104 psi | 74% | 2851 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,063 psi | 80% | 2920 fps | 98.9% |
| Alliant Reloder-16 | <<locked>> | 82% | 33,823 psi | 61% | 2743 fps | 95.5% |
| Alliant Reloder-17 | 38.8 gr | 80% | 35,665 psi | 65% | 2822 fps | 98% |
| Alliant Reloder-23 | <<locked>> | 88% | 29,501 psi | 53% | 2638 fps | 95.3% |
| Alliant Reloder-26 | 45.7 gr | 92% | 36,811 psi | 67% | 2904 fps | 96.1% |
| Bofors RP3 | <<locked>> | 80% | 40,872 psi | 74% | 2854 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 44,266 psi | 80% | 2884 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 41,611 psi | 75% | 2861 fps | 97.4% |
| Hodgdon H414 | <<locked>> | 86% | 41,771 psi | 76% | 2913 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,153 psi | 53% | 2572 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,223 psi | 82% | 2969 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 44,367 psi | 80% | 2992 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,658 psi | 48% | 1739 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,221 psi | 78% | 2864 fps | 98.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,542 psi | 82% | 2887 fps | 96.2% |
| IMR 4350 | <<locked>> | 90% | 45,005 psi | 81% | 2920 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,047 psi | 78% | 2861 fps | 95.3% |
| IMR 4831 | <<locked>> | 82% | 32,663 psi | 59% | 2677 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 45,165 psi | 82% | 2953 fps | 99.4% |
| Lovex S062 | <<locked>> | 80% | 43,192 psi | 78% | 2867 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 37,782 psi | 68% | 2746 fps | 95.3% |
| Lovex S070 | <<locked>> | 86% | 40,770 psi | 74% | 2831 fps | 95% |
| Norma 203B | <<locked>> | 80% | 43,424 psi | 79% | 2910 fps | 99.1% |
| Norma MRP | <<locked>> | 96% | 42,627 psi | 77% | 3005 fps | 95.2% |
| Norma URP | <<locked>> | 82% | 34,156 psi | 62% | 2730 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 43,410 psi | 79% | 2927 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 40,814 psi | 74% | 2900 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,919 psi | 49% | 1775 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,003 psi | 76% | 2844 fps | 95.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,985 psi | 69% | 2894 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 36,289 psi | 66% | 2808 fps | 96% |
| ReloadSwiss RS 70 | 42.3 gr | 86% | 38,435 psi | 70% | 2881 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 80% | 44,730 psi | 81% | 2881 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 38,377 psi | 69% | 2792 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 86% | 44,266 psi | 80% | 2884 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 82% | 37,782 psi | 68% | 2746 fps | 95.3% |
| Shooters World Precision | <<locked>> | 80% | 43,192 psi | 78% | 2867 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 86% | 40,770 psi | 74% | 2831 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,639 psi | 72% | 2848 fps | 98.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,654 psi | 74% | 2733 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,235 psi | 76% | 2802 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 39,102 psi | 71% | 2799 fps | 98.7% |
| Somchem S365 | <<locked>> | 80% | 28,500 psi | 52% | 2612 fps | 96.7% |
| Somchem S385 | <<locked>> | 96% | 45,629 psi | 83% | 2963 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 80% | 44,889 psi | 81% | 2861 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,426 psi | 82% | 2871 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,275 psi | 67% | 2730 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 80% | 33,272 psi | 60% | 2674 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 43,772 psi | 79% | 2858 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 35,027 psi | 63% | 2730 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 88% | 32,140 psi | 58% | 2720 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,967 psi | 60% | 2648 fps | 97.3% |
| Winchester 760 | <<locked>> | 86% | 41,771 psi | 76% | 2913 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 92% | 29,704 psi | 54% | 2726 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,760 psi | 85% | 2963 fps | 99.8% |
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 62 powders for .243 Ackley Improved loaded with the .245 | 92gr | Peregrine VLR-4. Alliant Reloder-26 delivers the highest muzzle velocity at 3,196 fps; across all powders the maximum-charge window runs from 1,942 fps to 3,196 fps. Accurate 3100 gives the best case fill at 100 %, and 62 of the 62 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (381 MPa), the top charges use 65–90 %, leaving at least 10 % headroom. The 92.0 gr projectile in 0.245" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-26 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-17, ReloadSwiss RS 70, Alliant Reloder-26 rank at the top here: for .243 Ackley Improved with the .245 | 92gr | 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.