Load Specifications
Load data in caliber .308 Win. Ackley Improved with .311 | 134gr | CutEdge ESP Raptor bullet and 55 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon H335, Hodgdon H322 and Shooters World AR Plus.
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>> | 86% | 51,198 psi | 85% | 2753 fps | 100% |
| Accurate 2015ᴾ | <<locked>> | 100% | 50,618 psi | 84% | 2831 fps | 99.9% |
| Accurate 2460 | <<locked>> | 98% | 53,040 psi | 88% | 2890 fps | 98.9% |
| Accurate 2495ᴾ | <<locked>> | 100% | 38,116 psi | 63% | 2694 fps | 99.1% |
| Accurate 2520ᴾ | <<locked>> | 100% | 49,763 psi | 83% | 2881 fps | 98.1% |
| Accurate 4064ᴾ | <<locked>> | 100% | 35,534 psi | 59% | 2654 fps | 96.2% |
| Accurate LT-30 | <<locked>> | 92% | 51,837 psi | 86% | 2766 fps | 99.5% |
| Accurate LT-32 | <<locked>> | 92% | 52,344 psi | 87% | 2776 fps | 98.4% |
| ADI AR 2207 | <<locked>> | 90% | 51,213 psi | 85% | 2805 fps | 100% |
| ADI AR 2219 | <<locked>> | 94% | 52,895 psi | 88% | 2913 fps | 99.6% |
| ADI Benchmark 8208ᴾ | <<locked>> | 100% | 50,386 psi | 84% | 2848 fps | 96.4% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 47,065 psi | 78% | 2864 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 98% | 53,751 psi | 89% | 2999 fps | 96.6% |
| Alliant Reloder-10x | <<locked>> | 96% | 51,314 psi | 85% | 2861 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 90% | 52,779 psi | 88% | 2815 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 94% | 53,606 psi | 89% | 2805 fps | 99.8% |
| Hodgdon Benchmarkᴾ | <<locked>> | 100% | 53,621 psi | 89% | 2851 fps | 97.6% |
| Hodgdon BL-C2ᴾ | <<locked>> | 100% | 47,427 psi | 79% | 2861 fps | 96.6% |
| Hodgdon H322 | <<locked>> | 96% | 50,908 psi | 85% | 2884 fps | 99.4% |
| Hodgdon H335 | <<locked>> | 96% | 52,431 psi | 87% | 2910 fps | 99% |
| Hodgdon H4198 | <<locked>> | 90% | 53,983 psi | 90% | 2815 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,807 psi | 53% | 1706 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 44,469 psi | 74% | 2841 fps | 99.3% |
| IMR 4198 | <<locked>> | 96% | 53,171 psi | 88% | 2838 fps | 100% |
| IMR 4227 | <<locked>> | 86% | 54,085 psi | 90% | 2776 fps | 100% |
| IMR 8208 XBRᴾ | <<locked>> | 100% | 50,386 psi | 84% | 2848 fps | 96.4% |
| Lovex D073.4 | <<locked>> | 92% | 54,447 psi | 90% | 2920 fps | 98.6% |
| Lovex D073.5 | <<locked>> | 98% | 53,519 psi | 89% | 2897 fps | 97.9% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 43,729 psi | 73% | 2795 fps | 97% |
| Lovex S053 | <<locked>> | 86% | 52,344 psi | 87% | 2720 fps | 100% |
| Norma 200 | <<locked>> | 92% | 51,503 psi | 86% | 2841 fps | 100% |
| Norma 202ᴾ | <<locked>> | 100% | 45,556 psi | 76% | 2799 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,662 psi | 53% | 1745 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 86% | 53,795 psi | 89% | 2808 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 98% | 53,911 psi | 90% | 2907 fps | 98.4% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 49,269 psi | 82% | 2828 fps | 98.4% |
| Shooters World AR Plus | <<locked>> | 92% | 54,447 psi | 90% | 2920 fps | 98.6% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 43,729 psi | 73% | 2795 fps | 97% |
| Shooters World Tactical Rifle | <<locked>> | 94% | 51,721 psi | 86% | 2822 fps | 96.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 90% | 53,069 psi | 88% | 2569 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 94% | 53,635 psi | 89% | 2920 fps | 99.1% |
| SNPE Vectan SP 3 | <<locked>> | 96% | 52,721 psi | 88% | 2874 fps | 99.9% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 49,603 psi | 82% | 2762 fps | 98.4% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 39,566 psi | 66% | 2605 fps | 97.5% |
| Somchem S321 | <<locked>> | 98% | 51,358 psi | 85% | 2890 fps | 97% |
| Somchem S335ᴾ | <<locked>> | 100% | 47,282 psi | 79% | 2753 fps | 98.9% |
| Vihtavuori N110 | <<locked>> | 82% | 54,128 psi | 90% | 2654 fps | 100% |
| Vihtavuori N120 | <<locked>> | 90% | 51,285 psi | 85% | 2759 fps | 100% |
| Vihtavuori N130 | <<locked>> | 98% | 52,214 psi | 87% | 2808 fps | 100% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 48,675 psi | 81% | 2766 fps | 99.8% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 40,379 psi | 67% | 2717 fps | 99.3% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 43,018 psi | 71% | 2726 fps | 97.8% |
| Vihtavuori N530ᴾ | <<locked>> | 100% | 50,821 psi | 84% | 2848 fps | 96.5% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 41,495 psi | 69% | 2713 fps | 96.9% |
| Winchester 748ᴾ | <<locked>> | 100% | 48,834 psi | 81% | 2884 fps | 97.1% |
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% | 41,756 psi | 69% | 2602 fps | 99.7% |
| Accurate 2015 | <<locked>> | 80% | 26,527 psi | 44% | 2336 fps | 95% |
| Accurate 2460 | <<locked>> | 88% | 37,405 psi | 62% | 2618 fps | 95.7% |
| Accurate 2495 | <<locked>> | 90% | 27,050 psi | 45% | 2434 fps | 95.9% |
| Accurate 2520 | <<locked>> | 92% | 37,362 psi | 62% | 2657 fps | 95.2% |
| Accurate 4064 | <<locked>> | 98% | 33,344 psi | 55% | 2602 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 35,868 psi | 60% | 2474 fps | 96.8% |
| Accurate LT-32 | <<locked>> | 82% | 38,522 psi | 64% | 2526 fps | 95.4% |
| ADI AR 2207 | <<locked>> | 80% | 37,376 psi | 62% | 2579 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 32,779 psi | 54% | 2526 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 96% | 44,396 psi | 74% | 2743 fps | 95% |
| Alliant AR-Comp | <<locked>> | 80% | 24,613 psi | 41% | 2346 fps | 96.7% |
| Alliant Power Pro 1200-R | <<locked>> | 94% | 47,079 psi | 78% | 2887 fps | 95.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 31,067 psi | 52% | 2470 fps | 98% |
| Alliant Reloder-7 | <<locked>> | 80% | 38,696 psi | 64% | 2579 fps | 99.7% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 33,823 psi | 56% | 2451 fps | 96.5% |
| Hodgdon Benchmark | <<locked>> | 92% | 42,192 psi | 70% | 2654 fps | 95.1% |
| Hodgdon BL-C2 | <<locked>> | 98% | 44,237 psi | 73% | 2805 fps | 95.8% |
| Hodgdon H322 | 35 gr | 82% | 32,024 psi | 53% | 2507 fps | 95.1% |
| Hodgdon H335 | 39.3 gr | 86% | 37,072 psi | 62% | 2628 fps | 95.8% |
| Hodgdon H4198 | <<locked>> | 80% | 39,653 psi | 66% | 2566 fps | 97.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,250 psi | 39% | 1522 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 30,400 psi | 51% | 2523 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 33,257 psi | 55% | 2477 fps | 99.1% |
| IMR 4227 | <<locked>> | 80% | 44,846 psi | 75% | 2638 fps | 100% |
| IMR 8208 XBR | <<locked>> | 96% | 44,396 psi | 74% | 2743 fps | 95% |
| Lovex D073.4 | <<locked>> | 82% | 37,826 psi | 63% | 2628 fps | 95% |
| Lovex D073.5 | <<locked>> | 90% | 40,103 psi | 67% | 2671 fps | 95% |
| Lovex D073.6 | <<locked>> | 96% | 37,855 psi | 63% | 2680 fps | 95.4% |
| Lovex S053 | <<locked>> | 80% | 43,918 psi | 73% | 2595 fps | 100% |
| Norma 200 | <<locked>> | 80% | 35,056 psi | 58% | 2549 fps | 99.4% |
| Norma 202 | <<locked>> | 92% | 35,027 psi | 58% | 2589 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,279 psi | 39% | 1562 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 44,541 psi | 74% | 2671 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 38,972 psi | 65% | 2641 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 90% | 36,492 psi | 61% | 2582 fps | 95.4% |
| Shooters World AR Plus | 37.6 gr | 82% | 37,826 psi | 63% | 2628 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 96% | 37,855 psi | 63% | 2680 fps | 95.4% |
| Shooters World Tactical Rifle | <<locked>> | 92% | 48,254 psi | 80% | 2762 fps | 95.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 40,683 psi | 68% | 2395 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 35,549 psi | 59% | 2589 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 31,894 psi | 53% | 2474 fps | 96.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 35,998 psi | 60% | 2513 fps | 95.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 32,648 psi | 54% | 2454 fps | 95.4% |
| Somchem S321 | <<locked>> | 94% | 44,802 psi | 74% | 2779 fps | 95.5% |
| Somchem S335 | <<locked>> | 88% | 32,605 psi | 54% | 2464 fps | 95.3% |
| Vihtavuori N110 | <<locked>> | 80% | 51,155 psi | 85% | 2618 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 37,565 psi | 62% | 2543 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 30,066 psi | 50% | 2388 fps | 97.4% |
| Vihtavuori N133 | <<locked>> | 82% | 27,760 psi | 46% | 2336 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 88% | 27,441 psi | 46% | 2415 fps | 95.6% |
| Vihtavuori N140 | <<locked>> | 94% | 35,621 psi | 59% | 2575 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 96% | 44,541 psi | 74% | 2740 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 96% | 36,550 psi | 61% | 2612 fps | 95.5% |
| Winchester 748 | <<locked>> | 96% | 42,699 psi | 71% | 2772 fps | 95.6% |
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 55 powders for .308 Win. Ackley Improved loaded with the .311 | 134gr | CutEdge ESP Raptor. Alliant Power Pro 1200-R delivers the highest muzzle velocity at 2,999 fps; across all powders the maximum-charge window runs from 1,706 fps to 2,999 fps. Accurate 2015 gives the best case fill at 100 %, and 55 of the 55 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 134.0 gr projectile in 0.311" calls for a 1:10.0 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 H335, Hodgdon H322, Shooters World AR Plus rank at the top here: for .308 Win. Ackley Improved with the .311 | 134gr | CutEdge ESP Raptor 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.