Load Specifications
Load data in caliber .308 Win. Ackley Improved with .308 | 146gr | Peregrine Glider GRM bullet and 79 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 H335 and Somchem S321.
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% | 53,127 psi | 88% | 2694 fps | 100% |
| Accurate 2015 | <<locked>> | 96% | 51,111 psi | 85% | 2746 fps | 100% |
| Accurate 2200 | <<locked>> | 88% | 53,316 psi | 89% | 2831 fps | 96.3% |
| Accurate 2230 | <<locked>> | 88% | 53,650 psi | 89% | 2838 fps | 96.7% |
| Accurate 2460 | <<locked>> | 94% | 53,272 psi | 89% | 2812 fps | 99.7% |
| Accurate 2495ᴾ | <<locked>> | 100% | 45,600 psi | 76% | 2733 fps | 100% |
| Accurate 2520 | <<locked>> | 98% | 54,128 psi | 90% | 2861 fps | 99.6% |
| Accurate 4064ᴾ | <<locked>> | 100% | 42,293 psi | 70% | 2703 fps | 99% |
| Accurate LT-30 | <<locked>> | 90% | 54,172 psi | 90% | 2717 fps | 100% |
| Accurate LT-32 | <<locked>> | 88% | 51,271 psi | 85% | 2684 fps | 99.2% |
| ADI AR 2206Hᴾ | <<locked>> | 100% | 53,722 psi | 89% | 2854 fps | 97.3% |
| ADI AR 2207 | <<locked>> | 88% | 54,288 psi | 90% | 2749 fps | 100% |
| ADI AR 2219 | <<locked>> | 90% | 52,750 psi | 88% | 2825 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 98% | 53,635 psi | 89% | 2822 fps | 98.4% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 54,447 psi | 90% | 2867 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 94% | 54,375 psi | 90% | 2923 fps | 98.1% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 43,105 psi | 72% | 2703 fps | 96.1% |
| Alliant Reloder-10x | <<locked>> | 92% | 51,576 psi | 86% | 2766 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 86% | 52,330 psi | 87% | 2717 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 90% | 52,779 psi | 88% | 2713 fps | 100% |
| Baschieri & Pellagri 107ᴾ | <<locked>> | 100% | 53,650 psi | 89% | 2858 fps | 96% |
| Bofors RP3ᴾ | <<locked>> | 100% | 42,337 psi | 70% | 2700 fps | 96% |
| Hodgdon Benchmark | <<locked>> | 96% | 53,258 psi | 88% | 2769 fps | 98.8% |
| Hodgdon BL-C2 | <<locked>> | 98% | 51,387 psi | 85% | 2844 fps | 98.6% |
| Hodgdon CFE223 | <<locked>> | 96% | 53,650 psi | 89% | 2930 fps | 96.7% |
| Hodgdon H322 | <<locked>> | 94% | 54,375 psi | 90% | 2848 fps | 100% |
| Hodgdon H335 | <<locked>> | 92% | 52,098 psi | 87% | 2818 fps | 99.7% |
| Hodgdon H4198 | <<locked>> | 86% | 52,707 psi | 88% | 2717 fps | 99.9% |
| Hodgdon H4895ᴾ | <<locked>> | 100% | 54,056 psi | 90% | 2867 fps | 97.9% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 48,776 psi | 81% | 2828 fps | 97.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,764 psi | 54% | 1670 fps | 100% |
| Hodgdon VARGETᴾ | <<locked>> | 100% | 52,547 psi | 87% | 2822 fps | 97.5% |
| IMR 3031ᴾ | <<locked>> | 100% | 51,735 psi | 86% | 2871 fps | 100% |
| IMR 4198 | <<locked>> | 92% | 53,113 psi | 88% | 2743 fps | 100% |
| IMR 4227 | <<locked>> | 82% | 52,620 psi | 87% | 2664 fps | 100% |
| IMR 4895ᴾ | <<locked>> | 100% | 48,399 psi | 80% | 2805 fps | 96.4% |
| IMR 8208 XBR | <<locked>> | 98% | 53,635 psi | 89% | 2822 fps | 98.4% |
| Lovex D073.4 | <<locked>> | 88% | 53,969 psi | 90% | 2828 fps | 99.4% |
| Lovex D073.5 | <<locked>> | 94% | 53,534 psi | 89% | 2815 fps | 99% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 51,401 psi | 85% | 2835 fps | 99.3% |
| Lovex S053 | <<locked>> | 82% | 51,634 psi | 86% | 2612 fps | 100% |
| Lovex S060 | <<locked>> | 98% | 52,112 psi | 87% | 2746 fps | 96.9% |
| Lovex S062ᴾ | <<locked>> | 100% | 46,340 psi | 77% | 2723 fps | 97.3% |
| Norma 200 | <<locked>> | 88% | 51,547 psi | 86% | 2746 fps | 100% |
| Norma 201ᴾ | <<locked>> | 100% | 52,025 psi | 86% | 2799 fps | 98.2% |
| Norma 202ᴾ | <<locked>> | 100% | 52,431 psi | 87% | 2825 fps | 99.7% |
| Norma 203Bᴾ | <<locked>> | 100% | 46,311 psi | 77% | 2756 fps | 95.8% |
| Ramshot Wild Boar | <<locked>> | 98% | 52,924 psi | 88% | 2844 fps | 97.1% |
| Ramshot X-Terminator | <<locked>> | 94% | 52,301 psi | 87% | 2776 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,706 psi | 54% | 1709 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 82% | 52,924 psi | 88% | 2703 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 94% | 53,838 psi | 89% | 2822 fps | 99.3% |
| ReloadSwiss RS 52ᴾ | <<locked>> | 100% | 49,908 psi | 83% | 2881 fps | 95.9% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 41,524 psi | 69% | 2730 fps | 96.9% |
| Rottweil R 901 | <<locked>> | 98% | 53,026 psi | 88% | 2802 fps | 99.6% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 49,153 psi | 82% | 2746 fps | 97.7% |
| Shooters World AR Plus | <<locked>> | 88% | 53,969 psi | 90% | 2828 fps | 99.4% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 51,401 psi | 85% | 2835 fps | 99.3% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 46,340 psi | 77% | 2723 fps | 97.3% |
| Shooters World Tactical Rifle | <<locked>> | 90% | 51,024 psi | 85% | 2740 fps | 97.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 86% | 52,199 psi | 87% | 2464 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 90% | 53,330 psi | 89% | 2831 fps | 99.7% |
| SNPE Vectan SP 3 | <<locked>> | 92% | 52,837 psi | 88% | 2785 fps | 100% |
| SNPE Vectan SP 9ᴾ | <<locked>> | 100% | 52,330 psi | 87% | 2825 fps | 97% |
| SNPE Vectan Tubal 3000 | <<locked>> | 98% | 52,431 psi | 87% | 2726 fps | 99.6% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 44,759 psi | 74% | 2621 fps | 99.5% |
| Somchem S321 | <<locked>> | 94% | 51,285 psi | 85% | 2812 fps | 98.3% |
| Somchem S335ᴾ | <<locked>> | 100% | 53,809 psi | 89% | 2769 fps | 100% |
| Somchem S341 | <<locked>> | 98% | 51,517 psi | 86% | 2795 fps | 96.6% |
| Vihtavuori N120 | <<locked>> | 88% | 54,288 psi | 90% | 2697 fps | 100% |
| Vihtavuori N130 | <<locked>> | 94% | 52,315 psi | 87% | 2720 fps | 100% |
| Vihtavuori N133 | <<locked>> | 98% | 51,793 psi | 86% | 2723 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 46,746 psi | 78% | 2733 fps | 100% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 49,501 psi | 82% | 2753 fps | 99.6% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 39,334 psi | 65% | 2589 fps | 96% |
| Vihtavuori N530 | <<locked>> | 96% | 51,039 psi | 85% | 2776 fps | 98% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 47,863 psi | 80% | 2743 fps | 99.2% |
| Winchester 748 | <<locked>> | 98% | 52,460 psi | 87% | 2867 fps | 99% |
| Winchester StaBALL Matchᴾ | <<locked>> | 100% | 51,242 psi | 85% | 2828 fps | 97.4% |
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% | 46,470 psi | 77% | 2598 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 30,632 psi | 51% | 2369 fps | 98.1% |
| Accurate 2200 | <<locked>> | 86% | 49,937 psi | 83% | 2776 fps | 95.5% |
| Accurate 2230 | <<locked>> | 84% | 46,209 psi | 77% | 2717 fps | 95.1% |
| Accurate 2460 | <<locked>> | 80% | 32,866 psi | 55% | 2441 fps | 95.8% |
| Accurate 2495 | <<locked>> | 80% | 22,800 psi | 38% | 2224 fps | 95.3% |
| Accurate 2520 | <<locked>> | 84% | 32,735 psi | 54% | 2474 fps | 95.3% |
| Accurate 4064 | <<locked>> | 88% | 28,369 psi | 47% | 2395 fps | 95% |
| Accurate LT-30 | <<locked>> | 80% | 39,595 psi | 66% | 2480 fps | 98.9% |
| Accurate LT-32 | <<locked>> | 80% | 40,016 psi | 66% | 2487 fps | 97.4% |
| ADI AR 2206H | <<locked>> | 94% | 44,367 psi | 74% | 2697 fps | 95.2% |
| ADI AR 2207 | <<locked>> | 80% | 42,192 psi | 70% | 2569 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 37,217 psi | 62% | 2556 fps | 98.3% |
| ADI Benchmark 8208 | <<locked>> | 88% | 39,088 psi | 65% | 2569 fps | 95.2% |
| Alliant AR-Comp | <<locked>> | 80% | 28,108 psi | 47% | 2385 fps | 99.4% |
| Alliant Power Pro 1200-R | 38.8 gr | 86% | 41,626 psi | 69% | 2700 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 40,393 psi | 67% | 2651 fps | 95.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 35,346 psi | 59% | 2487 fps | 99.7% |
| Alliant Reloder-7 | <<locked>> | 80% | 43,410 psi | 72% | 2579 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 38,014 psi | 63% | 2470 fps | 98.8% |
| Baschieri & Pellagri 107 | <<locked>> | 98% | 50,372 psi | 84% | 2805 fps | 95.2% |
| Bofors RP3 | <<locked>> | 98% | 39,523 psi | 66% | 2648 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 84% | 36,927 psi | 61% | 2477 fps | 95.2% |
| Hodgdon BL-C2 | <<locked>> | 88% | 36,187 psi | 60% | 2569 fps | 95.1% |
| Hodgdon CFE223 | <<locked>> | 92% | 46,557 psi | 77% | 2805 fps | 95% |
| Hodgdon H322 | <<locked>> | 80% | 34,055 psi | 57% | 2484 fps | 97.5% |
| Hodgdon H335 | 38.5 gr | 80% | 34,345 psi | 57% | 2493 fps | 96.6% |
| Hodgdon H4198 | <<locked>> | 80% | 43,743 psi | 73% | 2572 fps | 99.1% |
| Hodgdon H4895 | <<locked>> | 92% | 41,829 psi | 69% | 2657 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 40,089 psi | 67% | 2664 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,207 psi | 40% | 1493 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 43,381 psi | 72% | 2664 fps | 95.5% |
| IMR 3031 | <<locked>> | 80% | 26,948 psi | 45% | 2352 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 37,014 psi | 61% | 2477 fps | 100% |
| IMR 4227 | <<locked>> | 80% | 49,617 psi | 82% | 2621 fps | 100% |
| IMR 4895 | <<locked>> | 98% | 45,324 psi | 75% | 2753 fps | 95.7% |
| IMR 8208 XBR | <<locked>> | 88% | 39,088 psi | 65% | 2569 fps | 95.2% |
| Lovex D073.4 | <<locked>> | 80% | 40,625 psi | 67% | 2605 fps | 97.4% |
| Lovex D073.5 | <<locked>> | 82% | 34,998 psi | 58% | 2487 fps | 95.1% |
| Lovex D073.6 | <<locked>> | 88% | 33,692 psi | 56% | 2510 fps | 95.6% |
| Lovex S053 | <<locked>> | 80% | 48,385 psi | 80% | 2569 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 46,006 psi | 76% | 2644 fps | 95.6% |
| Lovex S062 | <<locked>> | 94% | 38,174 psi | 63% | 2569 fps | 95.1% |
| Norma 200 | <<locked>> | 80% | 39,987 psi | 66% | 2559 fps | 100% |
| Norma 201 | <<locked>> | 90% | 37,927 psi | 63% | 2546 fps | 95% |
| Norma 202 | <<locked>> | 84% | 31,241 psi | 52% | 2421 fps | 95.5% |
| Norma 203B | <<locked>> | 98% | 43,410 psi | 72% | 2707 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 94% | 46,253 psi | 77% | 2736 fps | 95.6% |
| Ramshot X-Terminator | <<locked>> | 90% | 45,963 psi | 76% | 2671 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,018 psi | 40% | 1526 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 49,661 psi | 83% | 2657 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 34,011 psi | 57% | 2457 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 98% | 46,398 psi | 77% | 2818 fps | 95% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 38,957 psi | 65% | 2671 fps | 96% |
| Rottweil R 901 | <<locked>> | 82% | 32,489 psi | 54% | 2411 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 92% | 38,189 psi | 63% | 2546 fps | 95% |
| Shooters World AR Plus | <<locked>> | 80% | 40,625 psi | 67% | 2605 fps | 97.4% |
| Shooters World Match Rifle | <<locked>> | 88% | 33,692 psi | 56% | 2510 fps | 95.6% |
| Shooters World Precision | <<locked>> | 94% | 38,174 psi | 63% | 2569 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 41,336 psi | 69% | 2572 fps | 95.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 44,512 psi | 74% | 2362 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 37,739 psi | 63% | 2559 fps | 97.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 36,071 psi | 60% | 2493 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 45,759 psi | 76% | 2717 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 31,734 psi | 53% | 2346 fps | 95.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 28,935 psi | 48% | 2297 fps | 95.7% |
| Somchem S321 | 41.7 gr | 86% | 38,899 psi | 65% | 2589 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 28,935 psi | 48% | 2297 fps | 95.5% |
| Somchem S341 | <<locked>> | 94% | 44,628 psi | 74% | 2680 fps | 95% |
| Vihtavuori N120 | <<locked>> | 80% | 42,308 psi | 70% | 2526 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 33,895 psi | 56% | 2402 fps | 99.3% |
| Vihtavuori N133 | <<locked>> | 80% | 29,443 psi | 49% | 2310 fps | 97.5% |
| Vihtavuori N135 | <<locked>> | 80% | 24,424 psi | 41% | 2251 fps | 95.7% |
| Vihtavuori N140 | <<locked>> | 84% | 29,573 psi | 49% | 2359 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 98% | 36,854 psi | 61% | 2536 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 88% | 38,899 psi | 65% | 2559 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 88% | 32,097 psi | 53% | 2434 fps | 95.6% |
| Winchester 748 | <<locked>> | 88% | 37,202 psi | 62% | 2589 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 94% | 41,930 psi | 70% | 2664 fps | 95.2% |
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 79 powders for .308 Win. Ackley Improved loaded with the .308 | 146gr | Peregrine Glider GRM. Hodgdon CFE223 delivers the highest muzzle velocity at 2,930 fps; across all powders the maximum-charge window runs from 1,670 fps to 2,930 fps. Accurate 2495 gives the best case fill at 100 %, and 79 of the 79 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. The 146.0 gr projectile in 0.308" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 4064, ADI AR 2206H 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 H335, Somchem S321 rank at the top here: for .308 Win. Ackley Improved with the .308 | 146gr | 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.