Load Specifications
Load data in caliber .308 Win. Ackley Improved with .308 | 125gr | Sierra Tipped GameKing bullet and 53 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon H322, Shooters World AR Plus and Lovex D073.4.
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 1680 | <<locked>> | 86% | 51,822 psi | 86% | 2867 fps | 100% |
| Accurate 2015ᴾ | <<locked>> | 100% | 51,474 psi | 86% | 2946 fps | 99.9% |
| Accurate 2460 | <<locked>> | 98% | 54,288 psi | 90% | 3012 fps | 98.7% |
| Accurate 2495ᴾ | <<locked>> | 100% | 39,595 psi | 66% | 2815 fps | 99% |
| Accurate 2520ᴾ | <<locked>> | 100% | 50,604 psi | 84% | 2995 fps | 97.8% |
| Accurate 4064ᴾ | <<locked>> | 100% | 36,840 psi | 61% | 2769 fps | 95.9% |
| Accurate LT-30 | <<locked>> | 92% | 52,446 psi | 87% | 2877 fps | 99.4% |
| Accurate LT-32 | <<locked>> | 92% | 52,939 psi | 88% | 2887 fps | 98.1% |
| ADI AR 2207 | <<locked>> | 90% | 51,967 psi | 86% | 2927 fps | 100% |
| ADI AR 2219 | <<locked>> | 94% | 53,751 psi | 89% | 3035 fps | 99.4% |
| ADI Benchmark 8208ᴾ | <<locked>> | 100% | 51,068 psi | 85% | 2959 fps | 96% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 47,645 psi | 79% | 2979 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 96% | 52,417 psi | 87% | 2982 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 90% | 53,751 psi | 89% | 2936 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 94% | 54,099 psi | 90% | 2917 fps | 99.6% |
| Hodgdon Benchmarkᴾ | <<locked>> | 100% | 54,433 psi | 90% | 2966 fps | 97.3% |
| Hodgdon BL-C2ᴾ | <<locked>> | 100% | 48,138 psi | 80% | 2976 fps | 96.2% |
| Hodgdon H322 | <<locked>> | 96% | 51,459 psi | 85% | 2999 fps | 99.2% |
| Hodgdon H335 | <<locked>> | 96% | 52,910 psi | 88% | 3022 fps | 98.7% |
| Hodgdon H4198 | <<locked>> | 90% | 54,331 psi | 90% | 2927 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,140 psi | 53% | 1788 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 45,411 psi | 75% | 2959 fps | 99.1% |
| IMR 4198 | <<locked>> | 96% | 53,983 psi | 90% | 2959 fps | 100% |
| IMR 4227 | <<locked>> | 86% | 54,230 psi | 90% | 2887 fps | 100% |
| IMR 8208 XBRᴾ | <<locked>> | 100% | 51,068 psi | 85% | 2959 fps | 96% |
| Lovex D073.4 | <<locked>> | 90% | 51,474 psi | 86% | 2976 fps | 97.7% |
| Lovex D073.5 | <<locked>> | 96% | 50,618 psi | 84% | 2953 fps | 97% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 44,469 psi | 74% | 2904 fps | 96.6% |
| Lovex S053 | <<locked>> | 86% | 52,750 psi | 88% | 2835 fps | 100% |
| Norma 200 | <<locked>> | 92% | 52,576 psi | 87% | 2963 fps | 100% |
| Norma 202ᴾ | <<locked>> | 100% | 46,398 psi | 77% | 2913 fps | 97.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,024 psi | 53% | 1831 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 86% | 54,462 psi | 90% | 2930 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 96% | 51,213 psi | 85% | 2966 fps | 97.6% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 50,401 psi | 84% | 2946 fps | 98.2% |
| Shooters World AR Plus | <<locked>> | 90% | 51,474 psi | 86% | 2976 fps | 97.7% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 44,469 psi | 74% | 2904 fps | 96.6% |
| Shooters World Tactical Rifle | <<locked>> | 94% | 52,402 psi | 87% | 2933 fps | 95.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 90% | 53,708 psi | 89% | 2684 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 94% | 54,288 psi | 90% | 3035 fps | 98.8% |
| SNPE Vectan SP 3 | <<locked>> | 96% | 53,635 psi | 89% | 2995 fps | 99.8% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 50,328 psi | 84% | 2874 fps | 98.2% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 40,277 psi | 67% | 2710 fps | 97.2% |
| Somchem S321 | <<locked>> | 98% | 52,127 psi | 87% | 3002 fps | 96.6% |
| Somchem S335ᴾ | <<locked>> | 100% | 48,269 psi | 80% | 2867 fps | 98.7% |
| Vihtavuori N120 | <<locked>> | 90% | 52,025 psi | 86% | 2877 fps | 100% |
| Vihtavuori N130 | <<locked>> | 98% | 53,069 psi | 88% | 2927 fps | 100% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 49,313 psi | 82% | 2877 fps | 99.7% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 41,162 psi | 68% | 2828 fps | 99.1% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 43,859 psi | 73% | 2835 fps | 97.5% |
| Vihtavuori N530ᴾ | <<locked>> | 100% | 51,866 psi | 86% | 2966 fps | 96.2% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 42,424 psi | 70% | 2822 fps | 96.6% |
| Winchester 748ᴾ | <<locked>> | 100% | 49,574 psi | 82% | 2999 fps | 96.7% |
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% | 42,554 psi | 71% | 2710 fps | 99.6% |
| Accurate 2015 | <<locked>> | 82% | 29,283 psi | 49% | 2493 fps | 95.6% |
| Accurate 2460 | <<locked>> | 88% | 38,551 psi | 64% | 2730 fps | 95.4% |
| Accurate 2495 | <<locked>> | 90% | 28,195 psi | 47% | 2546 fps | 95.7% |
| Accurate 2520 | <<locked>> | 94% | 41,075 psi | 68% | 2825 fps | 95.7% |
| Accurate 4064 | <<locked>> | 98% | 34,505 psi | 57% | 2713 fps | 95.1% |
| Accurate LT-30 | <<locked>> | 80% | 36,347 psi | 60% | 2575 fps | 96.4% |
| Accurate LT-32 | <<locked>> | 82% | 39,102 psi | 65% | 2631 fps | 95% |
| ADI AR 2207 | <<locked>> | 80% | 38,087 psi | 63% | 2690 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 33,605 psi | 56% | 2635 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 98% | 47,921 psi | 80% | 2907 fps | 95.3% |
| Alliant AR-Comp | <<locked>> | 80% | 25,469 psi | 42% | 2451 fps | 96.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 31,865 psi | 53% | 2575 fps | 97.7% |
| Alliant Reloder-7 | <<locked>> | 80% | 39,581 psi | 66% | 2690 fps | 99.5% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 34,606 psi | 57% | 2556 fps | 96.2% |
| Hodgdon Benchmark | <<locked>> | 94% | 45,571 psi | 76% | 2815 fps | 95.4% |
| Hodgdon BL-C2 | <<locked>> | 98% | 45,107 psi | 75% | 2917 fps | 95.4% |
| Hodgdon H322 | 37.6 gr | 84% | 35,041 psi | 58% | 2671 fps | 95.7% |
| Hodgdon H335 | <<locked>> | 86% | 37,956 psi | 63% | 2740 fps | 95.5% |
| Hodgdon H4198 | <<locked>> | 80% | 40,074 psi | 67% | 2671 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,714 psi | 39% | 1601 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 31,154 psi | 52% | 2628 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 33,721 psi | 56% | 2579 fps | 98.9% |
| IMR 4227 | <<locked>> | 80% | 45,426 psi | 75% | 2753 fps | 100% |
| IMR 8208 XBR | <<locked>> | 98% | 47,921 psi | 80% | 2907 fps | 95.3% |
| Lovex D073.4 | 40.3 gr | 84% | 41,539 psi | 69% | 2799 fps | 95.5% |
| Lovex D073.5 | <<locked>> | 92% | 44,063 psi | 73% | 2838 fps | 95.5% |
| Lovex D073.6 | <<locked>> | 96% | 38,798 psi | 64% | 2792 fps | 95% |
| Lovex S053 | <<locked>> | 80% | 44,411 psi | 74% | 2703 fps | 100% |
| Norma 200 | <<locked>> | 80% | 35,969 psi | 60% | 2661 fps | 99.2% |
| Norma 202 | <<locked>> | 94% | 38,145 psi | 63% | 2749 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,496 psi | 39% | 1637 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 45,281 psi | 75% | 2785 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 90% | 42,337 psi | 70% | 2805 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 90% | 37,652 psi | 63% | 2697 fps | 95.1% |
| Shooters World AR Plus | 40.3 gr | 84% | 41,539 psi | 69% | 2799 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 96% | 38,798 psi | 64% | 2792 fps | 95% |
| Shooters World Tactical Rifle | <<locked>> | 92% | 49,110 psi | 82% | 2877 fps | 95% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 41,191 psi | 68% | 2503 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 38,783 psi | 64% | 2749 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 32,460 psi | 54% | 2579 fps | 95.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 36,767 psi | 61% | 2618 fps | 95% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 33,388 psi | 55% | 2556 fps | 95% |
| Somchem S321 | <<locked>> | 94% | 45,556 psi | 76% | 2887 fps | 95.1% |
| Somchem S335 | <<locked>> | 88% | 33,634 psi | 56% | 2572 fps | 95% |
| Vihtavuori N120 | <<locked>> | 80% | 38,261 psi | 64% | 2651 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 30,792 psi | 51% | 2490 fps | 97.1% |
| Vihtavuori N133 | <<locked>> | 84% | 30,240 psi | 50% | 2487 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 88% | 28,297 psi | 47% | 2520 fps | 95.3% |
| Vihtavuori N140 | <<locked>> | 94% | 36,172 psi | 60% | 2677 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 98% | 48,530 psi | 81% | 2910 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 96% | 37,159 psi | 62% | 2710 fps | 95% |
| Winchester 748 | <<locked>> | 96% | 43,395 psi | 72% | 2881 fps | 95.1% |
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 53 powders for .308 Win. Ackley Improved loaded with the .308 | 125gr | Sierra Tipped GameKing. ADI AR 2219 delivers the highest muzzle velocity at 3,035 fps; across all powders the maximum-charge window runs from 1,788 fps to 3,035 fps. Accurate 2015 gives the best case fill at 100 %, and 53 of the 53 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 125.0 gr projectile in 0.308" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 2015, Accurate 2495, Accurate 2520 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. Hodgdon H322, Shooters World AR Plus, Lovex D073.4 rank at the top here: for .308 Win. Ackley Improved with the .308 | 125gr | Sierra Tipped GameKing 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.