Load Specifications
Load data in caliber .308 Win. Ackley Improved with .308 | 155.8gr | Peregrine Glider GRM bullet and 84 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon CFE223, Alliant Power Pro 1200-R 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.
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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>> | 84% | 54,302 psi | 90% | 2612 fps | 100% |
| Accurate 2015 | <<locked>> | 96% | 52,663 psi | 87% | 2667 fps | 100% |
| Accurate 2200 | <<locked>> | 86% | 51,169 psi | 85% | 2697 fps | 96.4% |
| Accurate 2230 | <<locked>> | 86% | 51,082 psi | 85% | 2703 fps | 96.8% |
| Accurate 2460 | <<locked>> | 92% | 51,343 psi | 85% | 2684 fps | 99.7% |
| Accurate 2495ᴾ | <<locked>> | 100% | 47,224 psi | 78% | 2657 fps | 100% |
| Accurate 2520 | <<locked>> | 96% | 51,996 psi | 86% | 2733 fps | 99.6% |
| Accurate 4064ᴾ | <<locked>> | 100% | 43,859 psi | 73% | 2635 fps | 99.5% |
| Accurate LT-30 | <<locked>> | 88% | 52,156 psi | 87% | 2592 fps | 100% |
| Accurate LT-32 | <<locked>> | 88% | 52,634 psi | 87% | 2608 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 98% | 51,866 psi | 86% | 2726 fps | 97.5% |
| ADI AR 2207 | <<locked>> | 86% | 52,141 psi | 87% | 2615 fps | 100% |
| ADI AR 2219 | <<locked>> | 90% | 54,056 psi | 90% | 2740 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 96% | 51,648 psi | 86% | 2694 fps | 98.5% |
| Alliant AR-Comp | <<locked>> | 98% | 52,750 psi | 88% | 2740 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 92% | 52,199 psi | 87% | 2789 fps | 98.3% |
| Alliant Power Pro 2000-MRᴾ | <<locked>> | 100% | 51,634 psi | 86% | 2805 fps | 96.1% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 44,193 psi | 73% | 2628 fps | 97% |
| Alliant Reloder-10x | <<locked>> | 92% | 53,229 psi | 88% | 2687 fps | 100% |
| Alliant Reloder-15ᴾ | <<locked>> | 100% | 48,515 psi | 81% | 2697 fps | 96.3% |
| Alliant Reloder-7 | <<locked>> | 86% | 53,737 psi | 89% | 2631 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 90% | 54,012 psi | 90% | 2631 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 98% | 51,401 psi | 85% | 2730 fps | 96.1% |
| Bofors RP3ᴾ | <<locked>> | 100% | 43,656 psi | 73% | 2631 fps | 96.9% |
| Hodgdon Benchmark | <<locked>> | 94% | 51,474 psi | 86% | 2648 fps | 98.9% |
| Hodgdon BL-C2 | <<locked>> | 98% | 52,924 psi | 88% | 2772 fps | 99.2% |
| Hodgdon CFE223 | <<locked>> | 94% | 51,314 psi | 85% | 2795 fps | 96.8% |
| Hodgdon H322 | <<locked>> | 92% | 52,460 psi | 87% | 2717 fps | 100% |
| Hodgdon H335 | <<locked>> | 92% | 53,650 psi | 89% | 2743 fps | 99.9% |
| Hodgdon H4198 | <<locked>> | 86% | 53,969 psi | 90% | 2635 fps | 100% |
| Hodgdon H4895 | <<locked>> | 98% | 52,156 psi | 87% | 2743 fps | 98.1% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 50,140 psi | 83% | 2756 fps | 98.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,040 psi | 55% | 1604 fps | 100% |
| Hodgdon VARGETᴾ | <<locked>> | 100% | 54,056 psi | 90% | 2746 fps | 98.2% |
| IMR 3031ᴾ | <<locked>> | 100% | 53,403 psi | 89% | 2789 fps | 100% |
| IMR 4064ᴾ | <<locked>> | 100% | 49,168 psi | 82% | 2651 fps | 96.4% |
| IMR 4198 | <<locked>> | 90% | 51,445 psi | 85% | 2615 fps | 100% |
| IMR 4227 | <<locked>> | 82% | 53,911 psi | 90% | 2579 fps | 100% |
| IMR 4895ᴾ | <<locked>> | 100% | 49,661 psi | 83% | 2730 fps | 97.3% |
| IMR 8208 XBR | <<locked>> | 96% | 51,648 psi | 86% | 2694 fps | 98.5% |
| Lovex D073.4 | <<locked>> | 86% | 51,706 psi | 86% | 2697 fps | 99.5% |
| Lovex D073.5 | <<locked>> | 92% | 51,329 psi | 85% | 2687 fps | 99.1% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 52,953 psi | 88% | 2756 fps | 99.7% |
| Lovex S053 | <<locked>> | 82% | 52,417 psi | 87% | 2520 fps | 100% |
| Lovex S060 | <<locked>> | 98% | 53,316 psi | 89% | 2671 fps | 97.7% |
| Lovex S062ᴾ | <<locked>> | 100% | 47,747 psi | 79% | 2654 fps | 98% |
| Norma 200 | <<locked>> | 88% | 52,837 psi | 88% | 2661 fps | 100% |
| Norma 201ᴾ | <<locked>> | 100% | 53,563 psi | 89% | 2726 fps | 98.8% |
| Norma 202ᴾ | <<locked>> | 100% | 53,621 psi | 89% | 2740 fps | 99.9% |
| Norma 203Bᴾ | <<locked>> | 100% | 47,514 psi | 79% | 2684 fps | 96.7% |
| Ramshot Big Gameᴾ | <<locked>> | 100% | 48,428 psi | 80% | 2707 fps | 96.5% |
| Ramshot Wild Boar | <<locked>> | 98% | 54,404 psi | 90% | 2769 fps | 97.8% |
| Ramshot X-Terminator | <<locked>> | 94% | 53,780 psi | 89% | 2700 fps | 97.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,069 psi | 55% | 1644 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 82% | 54,186 psi | 90% | 2615 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 92% | 51,706 psi | 86% | 2694 fps | 99.4% |
| ReloadSwiss RS 52ᴾ | <<locked>> | 100% | 51,372 psi | 85% | 2808 fps | 96.9% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 42,656 psi | 71% | 2667 fps | 98% |
| Rottweil R 901 | <<locked>> | 98% | 54,317 psi | 90% | 2720 fps | 99.9% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 50,517 psi | 84% | 2671 fps | 98.4% |
| Shooters World AR Plus | <<locked>> | 86% | 51,706 psi | 86% | 2697 fps | 99.5% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 52,953 psi | 88% | 2756 fps | 99.7% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 47,747 psi | 79% | 2654 fps | 98% |
| Shooters World Tactical Rifle | <<locked>> | 90% | 52,315 psi | 87% | 2664 fps | 98.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 86% | 53,098 psi | 88% | 2379 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 88% | 50,995 psi | 85% | 2697 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 92% | 54,157 psi | 90% | 2700 fps | 100% |
| SNPE Vectan SP 9ᴾ | <<locked>> | 100% | 53,693 psi | 89% | 2749 fps | 97.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 98% | 53,606 psi | 89% | 2648 fps | 99.9% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 46,253 psi | 77% | 2552 fps | 99.8% |
| Somchem S321 | <<locked>> | 94% | 52,939 psi | 88% | 2736 fps | 98.9% |
| Somchem S335 | <<locked>> | 98% | 51,851 psi | 86% | 2644 fps | 100% |
| Somchem S341 | <<locked>> | 98% | 52,634 psi | 87% | 2717 fps | 97.4% |
| Somchem S355ᴾ | <<locked>> | 100% | 42,119 psi | 70% | 2579 fps | 95.9% |
| Vihtavuori N120 | <<locked>> | 86% | 52,141 psi | 87% | 2566 fps | 100% |
| Vihtavuori N130 | <<locked>> | 94% | 53,664 psi | 89% | 2638 fps | 100% |
| Vihtavuori N133 | <<locked>> | 98% | 52,982 psi | 88% | 2641 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 48,530 psi | 81% | 2661 fps | 100% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 50,995 psi | 85% | 2677 fps | 99.9% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 40,669 psi | 68% | 2523 fps | 97% |
| Vihtavuori N530 | <<locked>> | 96% | 52,475 psi | 87% | 2700 fps | 98.7% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 49,153 psi | 82% | 2667 fps | 99.6% |
| Winchester 748 | <<locked>> | 98% | 53,954 psi | 90% | 2789 fps | 99.4% |
| Winchester StaBALL Matchᴾ | <<locked>> | 100% | 52,765 psi | 88% | 2753 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% | 47,645 psi | 79% | 2520 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 31,705 psi | 53% | 2306 fps | 98.8% |
| Accurate 2200 | <<locked>> | 84% | 47,834 psi | 79% | 2641 fps | 95.7% |
| Accurate 2230 | <<locked>> | 82% | 44,164 psi | 73% | 2589 fps | 95.2% |
| Accurate 2460 | <<locked>> | 80% | 33,750 psi | 56% | 2375 fps | 96.8% |
| Accurate 2495 | <<locked>> | 80% | 23,670 psi | 39% | 2172 fps | 96.5% |
| Accurate 2520 | <<locked>> | 82% | 31,575 psi | 52% | 2362 fps | 95.6% |
| Accurate 4064 | <<locked>> | 86% | 27,572 psi | 46% | 2290 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 40,727 psi | 68% | 2411 fps | 99.4% |
| Accurate LT-32 | <<locked>> | 80% | 41,089 psi | 68% | 2418 fps | 98.1% |
| ADI AR 2206H | <<locked>> | 92% | 42,685 psi | 71% | 2572 fps | 95.4% |
| ADI AR 2207 | <<locked>> | 80% | 43,439 psi | 72% | 2490 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 38,377 psi | 64% | 2487 fps | 99% |
| ADI Benchmark 8208 | <<locked>> | 86% | 37,565 psi | 62% | 2448 fps | 95.4% |
| Alliant AR-Comp | <<locked>> | 80% | 28,906 psi | 48% | 2320 fps | 99.8% |
| Alliant Power Pro 1200-R | 36.8 gr | 84% | 39,943 psi | 66% | 2572 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 98% | 48,312 psi | 80% | 2749 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 38,928 psi | 65% | 2530 fps | 95.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 36,463 psi | 61% | 2418 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 98% | 45,745 psi | 76% | 2651 fps | 95.6% |
| Alliant Reloder-7 | <<locked>> | 80% | 44,396 psi | 74% | 2500 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 38,856 psi | 65% | 2398 fps | 99.3% |
| Baschieri & Pellagri 107 | <<locked>> | 96% | 48,196 psi | 80% | 2680 fps | 95.4% |
| Bofors RP3 | <<locked>> | 96% | 38,218 psi | 63% | 2533 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 82% | 35,534 psi | 59% | 2362 fps | 95.4% |
| Hodgdon BL-C2 | <<locked>> | 86% | 34,824 psi | 58% | 2451 fps | 95.3% |
| Hodgdon CFE223 | 43 gr | 90% | 44,701 psi | 74% | 2680 fps | 95.2% |
| Hodgdon H322 | <<locked>> | 80% | 34,998 psi | 58% | 2418 fps | 98.3% |
| Hodgdon H335 | <<locked>> | 80% | 35,505 psi | 59% | 2431 fps | 97.5% |
| Hodgdon H4198 | <<locked>> | 80% | 44,947 psi | 75% | 2497 fps | 99.5% |
| Hodgdon H4895 | <<locked>> | 90% | 40,393 psi | 67% | 2539 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 38,435 psi | 64% | 2539 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,207 psi | 40% | 1430 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 41,916 psi | 70% | 2546 fps | 95.8% |
| IMR 3031 | <<locked>> | 80% | 27,702 psi | 46% | 2293 fps | 96.7% |
| IMR 4064 | <<locked>> | 96% | 43,337 psi | 72% | 2552 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 38,232 psi | 64% | 2408 fps | 100% |
| IMR 4227 | <<locked>> | 80% | 50,734 psi | 84% | 2536 fps | 100% |
| IMR 4895 | <<locked>> | 94% | 40,973 psi | 68% | 2579 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 86% | 37,565 psi | 62% | 2448 fps | 95.4% |
| Lovex D073.4 | <<locked>> | 80% | 41,756 psi | 69% | 2536 fps | 98.1% |
| Lovex D073.5 | <<locked>> | 80% | 33,475 psi | 56% | 2369 fps | 95.2% |
| Lovex D073.6 | <<locked>> | 84% | 30,342 psi | 50% | 2346 fps | 95% |
| Lovex S053 | <<locked>> | 80% | 49,792 psi | 83% | 2487 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 41,858 psi | 70% | 2480 fps | 95.1% |
| Lovex S062 | <<locked>> | 92% | 36,869 psi | 61% | 2454 fps | 95.4% |
| Norma 200 | <<locked>> | 80% | 41,060 psi | 68% | 2484 fps | 100% |
| Norma 201 | <<locked>> | 88% | 36,492 psi | 61% | 2428 fps | 95.2% |
| Norma 202 | <<locked>> | 82% | 30,139 psi | 50% | 2310 fps | 95.7% |
| Norma 203B | <<locked>> | 96% | 41,916 psi | 70% | 2585 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 98% | 45,382 psi | 75% | 2654 fps | 95.7% |
| Ramshot Wild Boar | <<locked>> | 90% | 41,611 psi | 69% | 2559 fps | 95% |
| Ramshot X-Terminator | <<locked>> | 88% | 44,251 psi | 74% | 2549 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,076 psi | 40% | 1463 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 50,705 psi | 84% | 2569 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 35,027 psi | 58% | 2395 fps | 96.2% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 44,860 psi | 75% | 2697 fps | 95.3% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 34,911 psi | 58% | 2490 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 31,401 psi | 52% | 2300 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 90% | 36,767 psi | 61% | 2428 fps | 95.2% |
| Shooters World AR Plus | <<locked>> | 80% | 41,756 psi | 69% | 2536 fps | 98.1% |
| Shooters World Match Rifle | <<locked>> | 84% | 30,342 psi | 50% | 2346 fps | 95% |
| Shooters World Precision | <<locked>> | 92% | 36,869 psi | 61% | 2454 fps | 95.4% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 39,726 psi | 66% | 2454 fps | 95.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 45,498 psi | 76% | 2283 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 38,986 psi | 65% | 2493 fps | 98.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 37,260 psi | 62% | 2428 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 41,408 psi | 69% | 2546 fps | 95% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 30,574 psi | 51% | 2234 fps | 95.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 26,165 psi | 43% | 2146 fps | 95.1% |
| Somchem S321 | <<locked>> | 84% | 37,304 psi | 62% | 2467 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 29,689 psi | 49% | 2234 fps | 96.5% |
| Somchem S341 | <<locked>> | 92% | 42,859 psi | 71% | 2559 fps | 95.2% |
| Somchem S355 | <<locked>> | 98% | 39,378 psi | 65% | 2526 fps | 95.1% |
| Vihtavuori N120 | <<locked>> | 80% | 43,526 psi | 72% | 2448 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 34,925 psi | 58% | 2336 fps | 99.7% |
| Vihtavuori N133 | <<locked>> | 80% | 30,400 psi | 51% | 2251 fps | 98.3% |
| Vihtavuori N135 | <<locked>> | 80% | 25,309 psi | 42% | 2198 fps | 96.9% |
| Vihtavuori N140 | <<locked>> | 82% | 28,558 psi | 47% | 2251 fps | 95.4% |
| Vihtavuori N150 | <<locked>> | 96% | 35,476 psi | 59% | 2421 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 86% | 37,405 psi | 62% | 2441 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 84% | 29,008 psi | 48% | 2277 fps | 95% |
| Winchester 748 | 38.6 gr | 84% | 33,692 psi | 56% | 2421 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 92% | 40,176 psi | 67% | 2543 fps | 95.4% |
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 84 powders for .308 Win. Ackley Improved loaded with the .308 | 155.8gr | Peregrine Glider GRM. ReloadSwiss RS 52 delivers the highest muzzle velocity at 2,808 fps; across all powders the maximum-charge window runs from 1,604 fps to 2,808 fps. Accurate 2495 gives the best case fill at 100 %, and 84 of the 84 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 156.0 gr projectile in 0.308" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 4064, Alliant Power Pro 2000-MR 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 CFE223, Alliant Power Pro 1200-R, Winchester 748 rank at the top here: for .308 Win. Ackley Improved with the .308 | 155.8gr | Peregrine Glider GRM 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.