Load Specifications
Load data in caliber .308 Win. Ackley Improved with .308 | 123gr | Sako Gamehead bullet and 59 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 1200-R, Hodgdon H322 and Winchester 748.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 84% | 51,982 psi | 86% | 2940 fps | 100% |
| Accurate 2015 | <<locked>> | 98% | 52,982 psi | 88% | 3038 fps | 100% |
| Accurate 2460 | <<locked>> | 94% | 51,837 psi | 86% | 3045 fps | 98.8% |
| Accurate 2495ᴾ | <<locked>> | 100% | 44,512 psi | 74% | 2966 fps | 99.8% |
| Accurate 2520 | <<locked>> | 98% | 52,446 psi | 87% | 3097 fps | 98.6% |
| Accurate 4064ᴾ | <<locked>> | 100% | 41,321 psi | 69% | 2927 fps | 97.7% |
| Accurate LT-30 | <<locked>> | 90% | 52,663 psi | 87% | 2956 fps | 99.7% |
| Accurate LT-32 | <<locked>> | 90% | 53,069 psi | 88% | 2966 fps | 98.6% |
| ADI AR 2207 | <<locked>> | 88% | 52,924 psi | 88% | 3005 fps | 100% |
| ADI AR 2219 | <<locked>> | 90% | 51,111 psi | 85% | 3064 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 98% | 52,199 psi | 87% | 3054 fps | 97% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 52,765 psi | 88% | 3123 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 94% | 52,446 psi | 87% | 3159 fps | 96.5% |
| Alliant Reloder-10x | <<locked>> | 94% | 53,432 psi | 89% | 3064 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 86% | 51,097 psi | 85% | 2966 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 90% | 51,285 psi | 85% | 2943 fps | 99.7% |
| Hodgdon Benchmark | <<locked>> | 96% | 52,054 psi | 86% | 3005 fps | 97.5% |
| Hodgdon BL-C2ᴾ | <<locked>> | 100% | 53,403 psi | 89% | 3133 fps | 97.9% |
| Hodgdon H322 | <<locked>> | 94% | 52,895 psi | 88% | 3094 fps | 99.6% |
| Hodgdon H335 | <<locked>> | 94% | 54,288 psi | 90% | 3114 fps | 99.3% |
| Hodgdon H4198 | <<locked>> | 86% | 51,372 psi | 85% | 2956 fps | 99.3% |
| Hodgdon H4895ᴾ | <<locked>> | 100% | 52,591 psi | 87% | 3100 fps | 96.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,561 psi | 54% | 1854 fps | 100% |
| Hodgdon VARGETᴾ | <<locked>> | 100% | 51,184 psi | 85% | 3048 fps | 95.9% |
| IMR 3031ᴾ | <<locked>> | 100% | 49,850 psi | 83% | 3107 fps | 99.8% |
| IMR 4198 | <<locked>> | 94% | 54,462 psi | 90% | 3035 fps | 100% |
| IMR 4227 | <<locked>> | 82% | 51,358 psi | 85% | 2917 fps | 100% |
| IMR 8208 XBR | <<locked>> | 98% | 52,199 psi | 87% | 3054 fps | 97% |
| Lovex D073.4 | <<locked>> | 88% | 52,591 psi | 87% | 3068 fps | 98.4% |
| Lovex D073.5 | <<locked>> | 94% | 52,083 psi | 87% | 3048 fps | 97.9% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 49,487 psi | 82% | 3061 fps | 98.2% |
| Lovex S053 | <<locked>> | 84% | 53,069 psi | 88% | 2904 fps | 100% |
| Lovex S060ᴾ | <<locked>> | 100% | 53,824 psi | 89% | 3025 fps | 95.9% |
| Norma 200 | <<locked>> | 90% | 53,722 psi | 89% | 3048 fps | 100% |
| Norma 201ᴾ | <<locked>> | 100% | 50,879 psi | 85% | 3035 fps | 96.8% |
| Norma 202ᴾ | <<locked>> | 100% | 50,865 psi | 85% | 3058 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,445 psi | 54% | 1896 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 82% | 51,358 psi | 85% | 2953 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 94% | 52,272 psi | 87% | 3058 fps | 98.3% |
| Rottweil R 901 | <<locked>> | 98% | 51,953 psi | 86% | 3041 fps | 98.8% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 47,848 psi | 79% | 2969 fps | 96.1% |
| Shooters World AR Plus | <<locked>> | 88% | 52,591 psi | 87% | 3068 fps | 98.4% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 49,487 psi | 82% | 3061 fps | 98.2% |
| Shooters World Tactical Rifle | <<locked>> | 92% | 53,417 psi | 89% | 3025 fps | 96.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 88% | 53,751 psi | 89% | 2746 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 90% | 51,764 psi | 86% | 3068 fps | 98.9% |
| SNPE Vectan SP 3 | <<locked>> | 92% | 51,358 psi | 85% | 3031 fps | 99.8% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 54,360 psi | 90% | 3012 fps | 99.1% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 43,656 psi | 73% | 2844 fps | 98.5% |
| Somchem S321 | <<locked>> | 96% | 53,505 psi | 89% | 3100 fps | 97.6% |
| Somchem S335ᴾ | <<locked>> | 100% | 52,547 psi | 87% | 3005 fps | 99.5% |
| Vihtavuori N120 | <<locked>> | 88% | 52,852 psi | 88% | 2953 fps | 100% |
| Vihtavuori N130 | <<locked>> | 96% | 53,940 psi | 90% | 3009 fps | 100% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 53,417 psi | 89% | 3009 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 45,353 psi | 75% | 2969 fps | 99.8% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 47,935 psi | 80% | 2979 fps | 98.7% |
| Vihtavuori N530 | <<locked>> | 98% | 52,852 psi | 88% | 3054 fps | 97.1% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 46,398 psi | 77% | 2966 fps | 98.1% |
| Winchester 748ᴾ | <<locked>> | 100% | 53,998 psi | 90% | 3150 fps | 98.2% |
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 1680 | <<locked>> | 80% | 45,368 psi | 75% | 2831 fps | 99.9% |
| Accurate 2015 | <<locked>> | 80% | 29,965 psi | 50% | 2569 fps | 96.4% |
| Accurate 2460 | <<locked>> | 84% | 36,941 psi | 61% | 2759 fps | 95.6% |
| Accurate 2495 | <<locked>> | 84% | 25,889 psi | 43% | 2523 fps | 95.1% |
| Accurate 2520 | <<locked>> | 88% | 36,767 psi | 61% | 2795 fps | 95.1% |
| Accurate 4064 | <<locked>> | 94% | 33,968 psi | 56% | 2759 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 80% | 38,856 psi | 65% | 2697 fps | 97.7% |
| Accurate LT-32 | <<locked>> | 80% | 39,233 psi | 65% | 2703 fps | 95.7% |
| ADI AR 2207 | <<locked>> | 80% | 41,220 psi | 68% | 2812 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 36,318 psi | 60% | 2769 fps | 96.8% |
| ADI Benchmark 8208 | <<locked>> | 94% | 45,934 psi | 76% | 2940 fps | 95.5% |
| Alliant AR-Comp | <<locked>> | 80% | 27,630 psi | 46% | 2585 fps | 98.1% |
| Alliant Power Pro 1200-R | 45.1 gr | 92% | 49,052 psi | 81% | 3097 fps | 95.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 34,563 psi | 57% | 2703 fps | 98.8% |
| Alliant Reloder-7 | <<locked>> | 80% | 42,612 psi | 71% | 2815 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 37,101 psi | 62% | 2677 fps | 97.5% |
| Hodgdon Benchmark | <<locked>> | 90% | 43,453 psi | 72% | 2844 fps | 95.6% |
| Hodgdon BL-C2 | <<locked>> | 94% | 43,178 psi | 72% | 2949 fps | 95.6% |
| Hodgdon H322 | 39.2 gr | 80% | 33,315 psi | 55% | 2690 fps | 95.7% |
| Hodgdon H335 | <<locked>> | 82% | 36,013 psi | 60% | 2759 fps | 95.5% |
| Hodgdon H4198 | <<locked>> | 80% | 42,844 psi | 71% | 2799 fps | 98% |
| Hodgdon H4895 | <<locked>> | 98% | 49,269 psi | 82% | 3041 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,989 psi | 40% | 1657 fps | 100% |
| Hodgdon VARGET | <<locked>> | 98% | 48,022 psi | 80% | 2992 fps | 95.1% |
| IMR 3031 | <<locked>> | 84% | 29,892 psi | 50% | 2654 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 36,230 psi | 60% | 2700 fps | 99.6% |
| IMR 4227 | <<locked>> | 80% | 48,341 psi | 80% | 2867 fps | 100% |
| IMR 8208 XBR | <<locked>> | 94% | 45,934 psi | 76% | 2940 fps | 95.5% |
| Lovex D073.4 | <<locked>> | 80% | 39,566 psi | 66% | 2822 fps | 95.6% |
| Lovex D073.5 | <<locked>> | 88% | 42,134 psi | 70% | 2867 fps | 95.7% |
| Lovex D073.6 | <<locked>> | 92% | 37,579 psi | 62% | 2825 fps | 95.3% |
| Lovex S053 | <<locked>> | 80% | 47,427 psi | 79% | 2818 fps | 100% |
| Lovex S060 | <<locked>> | 98% | 50,865 psi | 85% | 2972 fps | 95.2% |
| Norma 200 | <<locked>> | 80% | 39,204 psi | 65% | 2789 fps | 99.8% |
| Norma 201 | <<locked>> | 96% | 44,875 psi | 75% | 2923 fps | 95.4% |
| Norma 202 | <<locked>> | 88% | 34,679 psi | 58% | 2730 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,047 psi | 40% | 1699 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 48,443 psi | 80% | 2907 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 40,364 psi | 67% | 2831 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 86% | 36,347 psi | 60% | 2730 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 98% | 44,846 psi | 75% | 2910 fps | 95.3% |
| Shooters World AR Plus | <<locked>> | 80% | 39,566 psi | 66% | 2822 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 92% | 37,579 psi | 62% | 2825 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 88% | 46,470 psi | 77% | 2907 fps | 95.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 43,613 psi | 72% | 2602 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 36,811 psi | 61% | 2769 fps | 95.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 35,085 psi | 58% | 2707 fps | 97.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 35,172 psi | 58% | 2648 fps | 95.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 31,952 psi | 53% | 2585 fps | 95.2% |
| Somchem S321 | <<locked>> | 90% | 43,497 psi | 72% | 2917 fps | 95.3% |
| Somchem S335 | <<locked>> | 84% | 32,169 psi | 53% | 2595 fps | 95.1% |
| Vihtavuori N120 | <<locked>> | 80% | 41,307 psi | 69% | 2766 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 33,214 psi | 55% | 2612 fps | 98.3% |
| Vihtavuori N133 | <<locked>> | 80% | 28,819 psi | 48% | 2507 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 84% | 27,354 psi | 45% | 2546 fps | 95.4% |
| Vihtavuori N140 | <<locked>> | 90% | 34,998 psi | 58% | 2713 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 94% | 46,224 psi | 77% | 2940 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 92% | 35,810 psi | 59% | 2746 fps | 95.3% |
| Winchester 748 | 47.2 gr | 92% | 41,379 psi | 69% | 2910 fps | 95.3% |
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 59 powders for .308 Win. Ackley Improved loaded with the .308 | 123gr | Sako Gamehead. Alliant Power Pro 1200-R delivers the highest muzzle velocity at 3,159 fps; across all powders the maximum-charge window runs from 1,854 fps to 3,159 fps. Accurate 2495 gives the best case fill at 100 %, and 59 of the 59 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. Accurate 2495, Accurate 4064, Alliant AR-Comp 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 Power Pro 1200-R, Hodgdon H322, Winchester 748 rank at the top here: for .308 Win. Ackley Improved with the .308 | 123gr | Sako Gamehead 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.