Load Specifications
Load data in caliber .308 Win. Ackley Improved with .308 | 166gr | Peregrine Glider GRM bullet and 85 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>> | 82% | 51,851 psi | 86% | 2487 fps | 100% |
| Accurate 2015 | <<locked>> | 96% | 53,896 psi | 90% | 2585 fps | 100% |
| Accurate 2200 | <<locked>> | 86% | 52,011 psi | 86% | 2618 fps | 97.1% |
| Accurate 2230 | <<locked>> | 86% | 52,330 psi | 87% | 2628 fps | 97.5% |
| Accurate 2460 | <<locked>> | 92% | 52,417 psi | 87% | 2605 fps | 99.9% |
| Accurate 2495ᴾ | <<locked>> | 100% | 48,457 psi | 81% | 2579 fps | 100% |
| Accurate 2520 | <<locked>> | 96% | 53,359 psi | 89% | 2657 fps | 99.9% |
| Accurate 4064ᴾ | <<locked>> | 100% | 45,005 psi | 75% | 2562 fps | 99.8% |
| Accurate LT-30 | <<locked>> | 88% | 53,113 psi | 88% | 2513 fps | 100% |
| Accurate LT-32 | <<locked>> | 88% | 53,606 psi | 89% | 2530 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 98% | 52,881 psi | 88% | 2651 fps | 98.1% |
| ADI AR 2207 | <<locked>> | 86% | 53,359 psi | 89% | 2533 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 47,645 psi | 79% | 2546 fps | 96.3% |
| ADI AR 2219 | <<locked>> | 88% | 51,967 psi | 86% | 2615 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 96% | 52,576 psi | 87% | 2618 fps | 99% |
| Alliant AR-Comp | <<locked>> | 98% | 53,853 psi | 89% | 2654 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 92% | 53,432 psi | 89% | 2713 fps | 98.8% |
| Alliant Power Pro 2000-MRᴾ | <<locked>> | 100% | 52,649 psi | 87% | 2733 fps | 96.9% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 45,585 psi | 76% | 2562 fps | 97.8% |
| Alliant Reloder-10x | <<locked>> | 92% | 54,085 psi | 90% | 2598 fps | 100% |
| Alliant Reloder-15ᴾ | <<locked>> | 100% | 49,647 psi | 82% | 2625 fps | 97.1% |
| Alliant Reloder-7 | <<locked>> | 84% | 51,517 psi | 86% | 2510 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 51,517 psi | 86% | 2507 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 98% | 52,808 psi | 88% | 2664 fps | 97% |
| Bofors RP3ᴾ | <<locked>> | 100% | 44,860 psi | 75% | 2566 fps | 97.7% |
| Hodgdon Benchmark | <<locked>> | 94% | 52,460 psi | 87% | 2569 fps | 99.3% |
| Hodgdon BL-C2 | <<locked>> | 98% | 53,998 psi | 90% | 2690 fps | 99.5% |
| Hodgdon CFE223 | <<locked>> | 94% | 52,591 psi | 87% | 2723 fps | 97.6% |
| Hodgdon H322 | <<locked>> | 92% | 53,621 psi | 89% | 2638 fps | 100% |
| Hodgdon H335 | <<locked>> | 90% | 51,140 psi | 85% | 2612 fps | 99.9% |
| Hodgdon H4198 | <<locked>> | 84% | 51,663 psi | 86% | 2510 fps | 100% |
| Hodgdon H4895 | <<locked>> | 98% | 53,258 psi | 88% | 2664 fps | 98.6% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 51,097 psi | 85% | 2680 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,025 psi | 55% | 1542 fps | 100% |
| Hodgdon VARGET | <<locked>> | 98% | 52,011 psi | 86% | 2625 fps | 98.3% |
| IMR 3031 | <<locked>> | 98% | 51,227 psi | 85% | 2661 fps | 100% |
| IMR 4064ᴾ | <<locked>> | 100% | 50,082 psi | 83% | 2579 fps | 97.1% |
| IMR 4198 | <<locked>> | 90% | 52,243 psi | 87% | 2530 fps | 100% |
| IMR 4895ᴾ | <<locked>> | 100% | 50,836 psi | 84% | 2657 fps | 97.9% |
| IMR 8208 XBR | <<locked>> | 96% | 52,576 psi | 87% | 2618 fps | 99% |
| Lovex D073.4 | <<locked>> | 86% | 52,910 psi | 88% | 2618 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 92% | 52,446 psi | 87% | 2612 fps | 99.5% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 54,070 psi | 90% | 2677 fps | 99.9% |
| Lovex S053 | <<locked>> | 82% | 53,577 psi | 89% | 2441 fps | 100% |
| Lovex S060 | <<locked>> | 96% | 51,053 psi | 85% | 2546 fps | 97.7% |
| Lovex S062ᴾ | <<locked>> | 100% | 48,762 psi | 81% | 2579 fps | 98.6% |
| Norma 200 | <<locked>> | 88% | 54,027 psi | 90% | 2575 fps | 100% |
| Norma 201 | <<locked>> | 98% | 51,430 psi | 85% | 2602 fps | 98.9% |
| Norma 202 | <<locked>> | 98% | 51,517 psi | 86% | 2618 fps | 99.9% |
| Norma 203Bᴾ | <<locked>> | 100% | 48,646 psi | 81% | 2612 fps | 97.5% |
| Ramshot Big Gameᴾ | <<locked>> | 100% | 49,429 psi | 82% | 2635 fps | 97.2% |
| Ramshot Wild Boar | <<locked>> | 96% | 51,909 psi | 86% | 2641 fps | 97.9% |
| Ramshot X-Terminator | <<locked>> | 92% | 51,430 psi | 85% | 2579 fps | 97.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,098 psi | 55% | 1578 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 92% | 52,837 psi | 88% | 2618 fps | 99.7% |
| ReloadSwiss RS 52ᴾ | <<locked>> | 100% | 52,402 psi | 87% | 2730 fps | 97.6% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 43,453 psi | 72% | 2598 fps | 98.7% |
| Rottweil R 901 | <<locked>> | 96% | 52,272 psi | 87% | 2598 fps | 99.9% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 51,416 psi | 85% | 2595 fps | 98.9% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 41,640 psi | 69% | 2500 fps | 96.6% |
| Shooters World AR Plus | <<locked>> | 86% | 52,910 psi | 88% | 2618 fps | 99.8% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 54,070 psi | 90% | 2677 fps | 99.9% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 48,762 psi | 81% | 2579 fps | 98.6% |
| Shooters World Tactical Rifle | <<locked>> | 90% | 53,577 psi | 89% | 2589 fps | 98.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 86% | 54,027 psi | 90% | 2297 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 88% | 52,156 psi | 87% | 2621 fps | 99.9% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 44,440 psi | 74% | 2559 fps | 96.2% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 52,170 psi | 87% | 2575 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 98% | 51,488 psi | 86% | 2625 fps | 97.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 96% | 51,416 psi | 85% | 2526 fps | 99.9% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 47,036 psi | 78% | 2474 fps | 99.9% |
| Somchem S321 | <<locked>> | 94% | 53,780 psi | 89% | 2657 fps | 99.3% |
| Somchem S335 | <<locked>> | 98% | 53,113 psi | 88% | 2569 fps | 100% |
| Somchem S341 | <<locked>> | 98% | 54,114 psi | 90% | 2648 fps | 98.1% |
| Somchem S355ᴾ | <<locked>> | 100% | 43,105 psi | 72% | 2510 fps | 96.7% |
| Vihtavuori N120 | <<locked>> | 86% | 53,403 psi | 89% | 2484 fps | 100% |
| Vihtavuori N130 | <<locked>> | 92% | 51,387 psi | 85% | 2513 fps | 100% |
| Vihtavuori N133 | <<locked>> | 98% | 54,128 psi | 90% | 2559 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 49,501 psi | 82% | 2579 fps | 100% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 52,185 psi | 87% | 2598 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 41,611 psi | 69% | 2457 fps | 97.7% |
| Vihtavuori N530 | <<locked>> | 96% | 53,461 psi | 89% | 2621 fps | 99.1% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 50,357 psi | 84% | 2595 fps | 99.8% |
| Winchester 748 | <<locked>> | 96% | 51,648 psi | 86% | 2664 fps | 99.5% |
| Winchester StaBALL Matchᴾ | <<locked>> | 100% | 54,273 psi | 90% | 2684 fps | 98.7% |
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% | 48,515 psi | 81% | 2441 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 32,474 psi | 54% | 2241 fps | 99.2% |
| Accurate 2200 | <<locked>> | 80% | 42,859 psi | 71% | 2467 fps | 95% |
| Accurate 2230 | <<locked>> | 80% | 41,989 psi | 70% | 2461 fps | 95.3% |
| Accurate 2460 | <<locked>> | 80% | 34,563 psi | 57% | 2310 fps | 97.5% |
| Accurate 2495 | <<locked>> | 80% | 24,468 psi | 41% | 2119 fps | 97.4% |
| Accurate 2520 | <<locked>> | 80% | 30,284 psi | 50% | 2251 fps | 95.7% |
| Accurate 4064 | <<locked>> | 84% | 26,658 psi | 44% | 2188 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 80% | 41,495 psi | 69% | 2339 fps | 99.7% |
| Accurate LT-32 | <<locked>> | 80% | 41,872 psi | 70% | 2349 fps | 98.6% |
| ADI AR 2206H | <<locked>> | 90% | 41,089 psi | 68% | 2457 fps | 95.6% |
| ADI AR 2207 | <<locked>> | 80% | 44,266 psi | 74% | 2411 fps | 100% |
| ADI AR 2208 | <<locked>> | 98% | 44,875 psi | 75% | 2500 fps | 95.6% |
| ADI AR 2219 | <<locked>> | 80% | 39,189 psi | 65% | 2415 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 84% | 35,969 psi | 60% | 2329 fps | 95.5% |
| Alliant AR-Comp | <<locked>> | 80% | 29,631 psi | 49% | 2257 fps | 100% |
| Alliant Power Pro 1200-R | 34.9 gr | 82% | 38,435 psi | 64% | 2454 fps | 95.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 46,006 psi | 76% | 2618 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 37,333 psi | 62% | 2415 fps | 95.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 37,289 psi | 62% | 2343 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 41,089 psi | 68% | 2480 fps | 95% |
| Alliant Reloder-7 | <<locked>> | 80% | 45,295 psi | 75% | 2421 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 39,697 psi | 66% | 2329 fps | 99.6% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 45,919 psi | 76% | 2556 fps | 95.4% |
| Bofors RP3 | <<locked>> | 94% | 36,434 psi | 61% | 2411 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 34,069 psi | 57% | 2247 fps | 95.5% |
| Hodgdon BL-C2 | <<locked>> | 84% | 33,315 psi | 55% | 2336 fps | 95.4% |
| Hodgdon CFE223 | 40.8 gr | 88% | 42,685 psi | 71% | 2556 fps | 95.3% |
| Hodgdon H322 | <<locked>> | 80% | 35,926 psi | 60% | 2352 fps | 98.9% |
| Hodgdon H335 | <<locked>> | 80% | 36,405 psi | 60% | 2365 fps | 98.2% |
| Hodgdon H4198 | <<locked>> | 80% | 45,788 psi | 76% | 2421 fps | 99.8% |
| Hodgdon H4895 | <<locked>> | 88% | 38,566 psi | 64% | 2418 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 36,912 psi | 61% | 2428 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,482 psi | 41% | 1378 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 37,666 psi | 63% | 2379 fps | 95.1% |
| IMR 3031 | <<locked>> | 80% | 28,384 psi | 47% | 2234 fps | 97.6% |
| IMR 4064 | <<locked>> | 94% | 41,437 psi | 69% | 2434 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 38,841 psi | 65% | 2329 fps | 100% |
| IMR 4895 | <<locked>> | 92% | 39,233 psi | 65% | 2461 fps | 95.2% |
| IMR 8208 XBR | <<locked>> | 84% | 35,969 psi | 60% | 2329 fps | 95.5% |
| Lovex D073.4 | <<locked>> | 80% | 42,786 psi | 71% | 2467 fps | 98.7% |
| Lovex D073.5 | <<locked>> | 80% | 34,389 psi | 57% | 2306 fps | 96.2% |
| Lovex D073.6 | <<locked>> | 82% | 29,138 psi | 48% | 2238 fps | 95.2% |
| Lovex S053 | <<locked>> | 80% | 50,430 psi | 84% | 2398 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 40,089 psi | 67% | 2365 fps | 95.2% |
| Lovex S062 | <<locked>> | 90% | 35,694 psi | 59% | 2346 fps | 95.6% |
| Norma 200 | <<locked>> | 80% | 42,032 psi | 70% | 2408 fps | 100% |
| Norma 201 | <<locked>> | 86% | 35,215 psi | 59% | 2320 fps | 95.4% |
| Norma 202 | <<locked>> | 80% | 28,906 psi | 48% | 2198 fps | 95.8% |
| Norma 203B | <<locked>> | 94% | 40,263 psi | 67% | 2470 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 96% | 43,308 psi | 72% | 2533 fps | 95.8% |
| Ramshot Wild Boar | <<locked>> | 88% | 39,697 psi | 66% | 2441 fps | 95.1% |
| Ramshot X-Terminator | <<locked>> | 86% | 42,351 psi | 70% | 2431 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,410 psi | 41% | 1411 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 35,694 psi | 59% | 2326 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 42,844 psi | 71% | 2572 fps | 95.4% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 33,576 psi | 56% | 2382 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 32,111 psi | 53% | 2238 fps | 96.7% |
| Rottweil R 902 | <<locked>> | 88% | 35,476 psi | 59% | 2320 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 96% | 36,376 psi | 60% | 2402 fps | 95.1% |
| Shooters World AR Plus | <<locked>> | 80% | 42,786 psi | 71% | 2467 fps | 98.7% |
| Shooters World Match Rifle | <<locked>> | 82% | 29,138 psi | 48% | 2238 fps | 95.2% |
| Shooters World Precision | <<locked>> | 90% | 35,694 psi | 59% | 2346 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 38,000 psi | 63% | 2336 fps | 95.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 46,093 psi | 77% | 2201 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 39,929 psi | 66% | 2425 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 41,858 psi | 70% | 2513 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 38,087 psi | 63% | 2356 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 39,450 psi | 66% | 2425 fps | 95% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 31,183 psi | 52% | 2172 fps | 96.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 25,150 psi | 42% | 2044 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 33,301 psi | 55% | 2300 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 30,414 psi | 51% | 2175 fps | 97.3% |
| Somchem S341 | <<locked>> | 90% | 40,944 psi | 68% | 2441 fps | 95.3% |
| Somchem S355 | <<locked>> | 96% | 38,087 psi | 63% | 2418 fps | 95.3% |
| Vihtavuori N120 | <<locked>> | 80% | 44,353 psi | 74% | 2369 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 35,621 psi | 59% | 2264 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 80% | 31,053 psi | 52% | 2185 fps | 98.9% |
| Vihtavuori N135 | <<locked>> | 80% | 25,947 psi | 43% | 2139 fps | 97.7% |
| Vihtavuori N140 | <<locked>> | 80% | 27,383 psi | 45% | 2142 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 94% | 34,258 psi | 57% | 2316 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 84% | 35,752 psi | 59% | 2326 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 82% | 27,804 psi | 46% | 2169 fps | 95.1% |
| Winchester 748 | 36.5 gr | 82% | 32,082 psi | 53% | 2303 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 90% | 38,638 psi | 64% | 2428 fps | 95.5% |
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 85 powders for .308 Win. Ackley Improved loaded with the .308 | 166gr | Peregrine Glider GRM. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,733 fps; across all powders the maximum-charge window runs from 1,542 fps to 2,733 fps. Accurate 2495 gives the best case fill at 100 %, and 85 of the 85 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 166.0 gr projectile in 0.308" calls for a 1:10.0 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. Hodgdon CFE223, Alliant Power Pro 1200-R, Winchester 748 rank at the top here: for .308 Win. Ackley Improved with the .308 | 166gr | 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.