Load Specifications
Load data in caliber .308 Win. Ackley Improved with .308 | 135gr | Sierra HPBT MatchKing bullet and 83 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, Winchester 748 and Hodgdon BL-C2.
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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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>> | 82% | 52,678 psi | 88% | 2838 fps | 100% |
| Accurate 2015 | <<locked>> | 94% | 51,721 psi | 86% | 2900 fps | 100% |
| Accurate 2200 | <<locked>> | 86% | 53,069 psi | 88% | 2979 fps | 96.2% |
| Accurate 2230 | <<locked>> | 86% | 53,577 psi | 89% | 2989 fps | 96.7% |
| Accurate 2460 | <<locked>> | 92% | 53,998 psi | 90% | 2969 fps | 99.7% |
| Accurate 2495ᴾ | <<locked>> | 100% | 50,589 psi | 84% | 2943 fps | 100% |
| Accurate 2520 | <<locked>> | 94% | 51,039 psi | 85% | 2963 fps | 99.3% |
| Accurate 4064ᴾ | <<locked>> | 100% | 46,876 psi | 78% | 2917 fps | 99.5% |
| Accurate LT-30 | <<locked>> | 88% | 53,606 psi | 89% | 2861 fps | 100% |
| Accurate LT-32 | <<locked>> | 88% | 54,099 psi | 90% | 2877 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 98% | 54,201 psi | 90% | 3012 fps | 97.4% |
| ADI AR 2207 | <<locked>> | 86% | 54,143 psi | 90% | 2897 fps | 100% |
| ADI AR 2219 | <<locked>> | 88% | 52,837 psi | 88% | 2976 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 96% | 53,954 psi | 90% | 2979 fps | 98.4% |
| Alliant AR-Comp | <<locked>> | 96% | 51,721 psi | 86% | 2979 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 90% | 51,401 psi | 85% | 3028 fps | 97.6% |
| Alliant Power Pro 2000-MRᴾ | <<locked>> | 100% | 54,215 psi | 90% | 3097 fps | 96% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 51,430 psi | 85% | 2972 fps | 97.4% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 46,847 psi | 78% | 2907 fps | 96.9% |
| Alliant Reloder-10x | <<locked>> | 90% | 52,098 psi | 87% | 2923 fps | 100% |
| Alliant Reloder-15ᴾ | <<locked>> | 100% | 51,227 psi | 85% | 2979 fps | 96.2% |
| Alliant Reloder-7 | <<locked>> | 84% | 52,446 psi | 87% | 2867 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 52,417 psi | 87% | 2854 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 98% | 53,925 psi | 90% | 3015 fps | 96% |
| Bofors RP3ᴾ | <<locked>> | 100% | 46,383 psi | 77% | 2910 fps | 96.9% |
| Hodgdon Benchmark | <<locked>> | 94% | 53,606 psi | 89% | 2927 fps | 98.8% |
| Hodgdon BL-C2 | <<locked>> | 96% | 51,851 psi | 86% | 2999 fps | 98.6% |
| Hodgdon CFE223 | <<locked>> | 94% | 53,766 psi | 89% | 3084 fps | 96.7% |
| Hodgdon H322 | <<locked>> | 90% | 51,169 psi | 85% | 2949 fps | 99.9% |
| Hodgdon H335 | <<locked>> | 90% | 52,562 psi | 87% | 2976 fps | 99.7% |
| Hodgdon H4198 | <<locked>> | 84% | 52,417 psi | 87% | 2864 fps | 99.9% |
| Hodgdon H4895 | <<locked>> | 96% | 51,242 psi | 85% | 2969 fps | 97.4% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 52,591 psi | 87% | 3041 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,286 psi | 55% | 1791 fps | 100% |
| Hodgdon VARGET | <<locked>> | 98% | 52,924 psi | 88% | 2976 fps | 97.6% |
| IMR 3031 | <<locked>> | 98% | 52,330 psi | 87% | 3025 fps | 100% |
| IMR 4064ᴾ | <<locked>> | 100% | 51,213 psi | 85% | 2927 fps | 96.2% |
| IMR 4198 | <<locked>> | 90% | 53,084 psi | 88% | 2890 fps | 100% |
| IMR 4895ᴾ | <<locked>> | 100% | 52,417 psi | 87% | 3018 fps | 97.2% |
| IMR 8208 XBR | <<locked>> | 96% | 53,954 psi | 90% | 2979 fps | 98.4% |
| Lovex D073.4 | <<locked>> | 86% | 54,418 psi | 90% | 2986 fps | 99.4% |
| Lovex D073.5 | <<locked>> | 92% | 53,882 psi | 90% | 2969 fps | 99% |
| Lovex D073.6 | <<locked>> | 98% | 52,272 psi | 87% | 2992 fps | 99.4% |
| Lovex S053 | <<locked>> | 82% | 54,230 psi | 90% | 2795 fps | 100% |
| Lovex S060 | <<locked>> | 96% | 52,315 psi | 87% | 2897 fps | 96.9% |
| Lovex S062ᴾ | <<locked>> | 100% | 49,995 psi | 83% | 2927 fps | 97.9% |
| Norma 200 | <<locked>> | 86% | 52,127 psi | 87% | 2900 fps | 100% |
| Norma 201 | <<locked>> | 98% | 52,736 psi | 88% | 2959 fps | 98.3% |
| Norma 202 | <<locked>> | 98% | 52,953 psi | 88% | 2979 fps | 99.7% |
| Norma 203Bᴾ | <<locked>> | 100% | 50,212 psi | 83% | 2969 fps | 96.7% |
| Ramshot Big Gameᴾ | <<locked>> | 100% | 51,024 psi | 85% | 2992 fps | 96.4% |
| Ramshot Wild Boar | <<locked>> | 96% | 53,403 psi | 89% | 3002 fps | 97.1% |
| Ramshot X-Terminator | <<locked>> | 92% | 52,605 psi | 87% | 2927 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,286 psi | 55% | 1831 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 92% | 54,114 psi | 90% | 2979 fps | 99.3% |
| ReloadSwiss RS 52ᴾ | <<locked>> | 100% | 53,838 psi | 89% | 3097 fps | 96.7% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 44,672 psi | 74% | 2943 fps | 97.8% |
| Rottweil R 901 | <<locked>> | 96% | 53,998 psi | 90% | 2963 fps | 99.7% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 53,026 psi | 88% | 2953 fps | 98.3% |
| Shooters World AR Plus | <<locked>> | 86% | 54,418 psi | 90% | 2986 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 98% | 52,272 psi | 87% | 2992 fps | 99.4% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 49,995 psi | 83% | 2927 fps | 97.9% |
| Shooters World Tactical Rifle | <<locked>> | 88% | 50,923 psi | 85% | 2884 fps | 97.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 51,967 psi | 86% | 2605 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 88% | 53,359 psi | 89% | 2982 fps | 99.7% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 53,055 psi | 88% | 2940 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 98% | 52,620 psi | 87% | 2979 fps | 97% |
| SNPE Vectan Tubal 3000 | <<locked>> | 96% | 52,765 psi | 88% | 2881 fps | 99.6% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 48,399 psi | 80% | 2822 fps | 99.7% |
| Somchem S321 | <<locked>> | 92% | 51,750 psi | 86% | 2963 fps | 98.3% |
| Somchem S335 | <<locked>> | 98% | 54,346 psi | 90% | 2923 fps | 100% |
| Somchem S341 | <<locked>> | 96% | 51,488 psi | 86% | 2940 fps | 96.6% |
| Somchem S355ᴾ | <<locked>> | 100% | 44,512 psi | 74% | 2851 fps | 95.8% |
| Vihtavuori N120 | <<locked>> | 86% | 54,128 psi | 90% | 2841 fps | 100% |
| Vihtavuori N130 | <<locked>> | 92% | 52,605 psi | 87% | 2871 fps | 100% |
| Vihtavuori N133 | <<locked>> | 96% | 52,156 psi | 87% | 2877 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 51,111 psi | 85% | 2943 fps | 100% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 53,243 psi | 88% | 2953 fps | 99.9% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 42,743 psi | 71% | 2785 fps | 96.8% |
| Vihtavuori N530 | <<locked>> | 94% | 51,213 psi | 85% | 2927 fps | 98% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 51,779 psi | 86% | 2946 fps | 99.6% |
| Winchester 748 | <<locked>> | 96% | 52,663 psi | 87% | 3018 fps | 99% |
| Winchester StaBALL Match | <<locked>> | 98% | 52,054 psi | 86% | 2989 fps | 97.5% |
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% | 49,472 psi | 82% | 2789 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 33,417 psi | 56% | 2556 fps | 98.6% |
| Accurate 2200 | <<locked>> | 84% | 49,719 psi | 83% | 2920 fps | 95.4% |
| Accurate 2230 | <<locked>> | 82% | 46,644 psi | 77% | 2867 fps | 95.1% |
| Accurate 2460 | <<locked>> | 80% | 36,027 psi | 60% | 2635 fps | 96.7% |
| Accurate 2495 | <<locked>> | 80% | 25,962 psi | 43% | 2421 fps | 96.5% |
| Accurate 2520 | <<locked>> | 82% | 33,678 psi | 56% | 2618 fps | 95.4% |
| Accurate 4064 | <<locked>> | 86% | 29,791 psi | 49% | 2543 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 42,206 psi | 70% | 2667 fps | 99.2% |
| Accurate LT-32 | <<locked>> | 80% | 42,540 psi | 71% | 2677 fps | 97.9% |
| ADI AR 2206H | <<locked>> | 92% | 44,962 psi | 75% | 2848 fps | 95.3% |
| ADI AR 2207 | <<locked>> | 80% | 45,107 psi | 75% | 2759 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 40,379 psi | 67% | 2756 fps | 98.8% |
| ADI Benchmark 8208 | <<locked>> | 86% | 39,537 psi | 66% | 2710 fps | 95.2% |
| Alliant AR-Comp | <<locked>> | 80% | 30,530 psi | 51% | 2572 fps | 99.7% |
| Alliant Power Pro 1200-R | 42.2 gr | 84% | 42,206 psi | 70% | 2851 fps | 95.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 98% | 50,546 psi | 84% | 3031 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 42,627 psi | 71% | 2808 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 41,162 psi | 68% | 2799 fps | 95.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 38,305 psi | 64% | 2680 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 98% | 48,066 psi | 80% | 2927 fps | 95.5% |
| Alliant Reloder-7 | <<locked>> | 80% | 46,238 psi | 77% | 2766 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 40,611 psi | 67% | 2651 fps | 99.2% |
| Baschieri & Pellagri 107 | <<locked>> | 96% | 50,415 psi | 84% | 2953 fps | 95.2% |
| Bofors RP3 | <<locked>> | 96% | 40,509 psi | 67% | 2799 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 82% | 37,130 psi | 62% | 2612 fps | 95.1% |
| Hodgdon BL-C2 | 46 gr | 86% | 36,825 psi | 61% | 2710 fps | 95.1% |
| Hodgdon CFE223 | <<locked>> | 90% | 46,804 psi | 78% | 2956 fps | 95% |
| Hodgdon H322 | <<locked>> | 80% | 36,782 psi | 61% | 2677 fps | 98.1% |
| Hodgdon H335 | <<locked>> | 80% | 37,275 psi | 62% | 2687 fps | 97.3% |
| Hodgdon H4198 | <<locked>> | 80% | 46,470 psi | 77% | 2762 fps | 99.4% |
| Hodgdon H4895 | <<locked>> | 90% | 42,467 psi | 71% | 2805 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 40,466 psi | 67% | 2808 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,555 psi | 41% | 1601 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 43,743 psi | 73% | 2812 fps | 95.5% |
| IMR 3031 | <<locked>> | 80% | 29,269 psi | 49% | 2543 fps | 96.5% |
| IMR 4064 | <<locked>> | 98% | 48,037 psi | 80% | 2871 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 39,494 psi | 66% | 2661 fps | 100% |
| IMR 4895 | <<locked>> | 94% | 43,279 psi | 72% | 2851 fps | 95% |
| IMR 8208 XBR | <<locked>> | 86% | 39,537 psi | 66% | 2710 fps | 95.2% |
| Lovex D073.4 | <<locked>> | 80% | 43,845 psi | 73% | 2805 fps | 98% |
| Lovex D073.5 | <<locked>> | 80% | 35,752 psi | 59% | 2628 fps | 95.2% |
| Lovex D073.6 | <<locked>> | 86% | 34,664 psi | 58% | 2654 fps | 95.8% |
| Lovex S053 | <<locked>> | 80% | 51,227 psi | 85% | 2756 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 46,267 psi | 77% | 2792 fps | 95.6% |
| Lovex S062 | <<locked>> | 92% | 39,044 psi | 65% | 2717 fps | 95.2% |
| Norma 200 | <<locked>> | 80% | 43,352 psi | 72% | 2756 fps | 100% |
| Norma 201 | <<locked>> | 88% | 38,696 psi | 64% | 2694 fps | 95.1% |
| Norma 202 | <<locked>> | 82% | 31,821 psi | 53% | 2556 fps | 95.5% |
| Norma 203B | <<locked>> | 96% | 44,193 psi | 73% | 2858 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 98% | 47,645 psi | 79% | 2930 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 92% | 46,543 psi | 77% | 2881 fps | 95.6% |
| Ramshot X-Terminator | <<locked>> | 88% | 46,079 psi | 77% | 2812 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,671 psi | 41% | 1640 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 36,535 psi | 61% | 2644 fps | 95.9% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 46,949 psi | 78% | 2976 fps | 95.1% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 36,912 psi | 61% | 2756 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 33,402 psi | 55% | 2552 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 90% | 38,856 psi | 65% | 2687 fps | 95.1% |
| Shooters World AR Plus | <<locked>> | 80% | 43,845 psi | 73% | 2805 fps | 98% |
| Shooters World Match Rifle | <<locked>> | 86% | 34,664 psi | 58% | 2654 fps | 95.8% |
| Shooters World Precision | <<locked>> | 92% | 39,044 psi | 65% | 2717 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 41,495 psi | 69% | 2710 fps | 95.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 46,615 psi | 77% | 2530 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 40,785 psi | 68% | 2756 fps | 98% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 38,885 psi | 65% | 2687 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 46,180 psi | 77% | 2864 fps | 95.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 32,111 psi | 53% | 2477 fps | 95.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 29,414 psi | 49% | 2428 fps | 95.7% |
| Somchem S321 | <<locked>> | 84% | 39,508 psi | 66% | 2733 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 31,444 psi | 52% | 2480 fps | 96.3% |
| Somchem S341 | <<locked>> | 92% | 45,107 psi | 75% | 2828 fps | 95.1% |
| Somchem S355 | <<locked>> | 98% | 41,742 psi | 69% | 2795 fps | 95% |
| Vihtavuori N120 | <<locked>> | 80% | 45,165 psi | 75% | 2710 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 36,550 psi | 61% | 2589 fps | 99.6% |
| Vihtavuori N133 | <<locked>> | 80% | 31,908 psi | 53% | 2493 fps | 98.1% |
| Vihtavuori N135 | <<locked>> | 80% | 26,905 psi | 45% | 2438 fps | 96.7% |
| Vihtavuori N140 | <<locked>> | 82% | 30,066 psi | 50% | 2487 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 96% | 37,739 psi | 63% | 2684 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 86% | 39,233 psi | 65% | 2700 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 86% | 32,837 psi | 55% | 2575 fps | 95.7% |
| Winchester 748 | 45.2 gr | 86% | 37,855 psi | 63% | 2736 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 92% | 42,438 psi | 71% | 2812 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 94 powders for .308 Win. Ackley Improved loaded with the .308 | 135gr | Sierra HPBT MatchKing. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,097 fps; across all powders the maximum-charge window runs from 1,791 fps to 3,097 fps. Accurate 2495 gives the best case fill at 100 %, and 94 of the 94 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 135.0 gr projectile in 0.308" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 4064, ADI AR 2208 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, Winchester 748, Hodgdon BL-C2 rank at the top here: for .308 Win. Ackley Improved with the .308 | 135gr | Sierra HPBT MatchKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-17, Hodgdon H380, IMR 4166 Enduron 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.