Load Specifications
Load data in caliber .308 Win. Ackley Improved with .308 | 180gr | Norma PlastSpitz bullet and 94 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, Hodgdon CFE223 and Ramshot Big Game.
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 2015 | <<locked>> | 90% | 53,635 psi | 89% | 2507 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 54,041 psi | 90% | 2592 fps | 98.8% |
| Accurate 2460 | <<locked>> | 86% | 52,127 psi | 87% | 2530 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 53,896 psi | 90% | 2562 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 53,229 psi | 88% | 2582 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 53,417 psi | 89% | 2598 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 42,105 psi | 70% | 2493 fps | 96.4% |
| Accurate LT-30 | <<locked>> | 84% | 54,056 psi | 90% | 2461 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 51,314 psi | 85% | 2438 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 52,649 psi | 87% | 2585 fps | 99.2% |
| ADI AR 2208 | <<locked>> | 98% | 53,693 psi | 89% | 2582 fps | 98.9% |
| ADI AR 2219 | <<locked>> | 84% | 54,114 psi | 90% | 2569 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 52,272 psi | 87% | 2552 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 90% | 51,372 psi | 85% | 2536 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 53,432 psi | 89% | 2644 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 51,866 psi | 86% | 2680 fps | 98.6% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 53,301 psi | 89% | 2598 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 52,257 psi | 87% | 2595 fps | 99.7% |
| Alliant Reloder-10x | <<locked>> | 86% | 53,751 psi | 89% | 2516 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 53,548 psi | 89% | 2621 fps | 99% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 43,134 psi | 72% | 2503 fps | 96.5% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 49,429 psi | 82% | 2648 fps | 99.3% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 52,866 psi | 88% | 2461 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 52,243 psi | 87% | 2598 fps | 98.4% |
| Bofors RP3 | <<locked>> | 98% | 52,591 psi | 87% | 2612 fps | 99.7% |
| Hodgdon Benchmark | <<locked>> | 90% | 54,433 psi | 90% | 2536 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 53,983 psi | 90% | 2625 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 51,967 psi | 86% | 2654 fps | 98.9% |
| Hodgdon H322 | <<locked>> | 86% | 52,997 psi | 88% | 2556 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 53,664 psi | 89% | 2575 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 54,447 psi | 90% | 2621 fps | 98.2% |
| Hodgdon H4895 | <<locked>> | 92% | 53,113 psi | 88% | 2598 fps | 99.6% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 39,291 psi | 65% | 2402 fps | 97.2% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 51,358 psi | 85% | 2621 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,374 psi | 57% | 1532 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 51,459 psi | 85% | 2556 fps | 99.4% |
| IMR 3031 | <<locked>> | 92% | 51,837 psi | 86% | 2585 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 52,866 psi | 88% | 2562 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 94% | 54,259 psi | 90% | 2546 fps | 95.8% |
| IMR 4198 | <<locked>> | 84% | 51,300 psi | 85% | 2441 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 40,683 psi | 68% | 2448 fps | 96% |
| IMR 4895 | <<locked>> | 94% | 51,256 psi | 85% | 2598 fps | 99.2% |
| IMR 8208 XBR | <<locked>> | 90% | 52,272 psi | 87% | 2552 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 86% | 52,025 psi | 86% | 2539 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 51,285 psi | 85% | 2569 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 53,142 psi | 88% | 2523 fps | 99.3% |
| Lovex S062 | <<locked>> | 96% | 52,141 psi | 87% | 2562 fps | 99.8% |
| Lovex S065ᴾ | <<locked>> | 100% | 48,153 psi | 80% | 2500 fps | 96.1% |
| Norma 200 | <<locked>> | 82% | 53,766 psi | 89% | 2490 fps | 100% |
| Norma 201 | <<locked>> | 92% | 51,576 psi | 86% | 2543 fps | 99.7% |
| Norma 202 | <<locked>> | 92% | 51,692 psi | 86% | 2549 fps | 100% |
| Norma 203B | <<locked>> | 96% | 52,649 psi | 87% | 2608 fps | 99.3% |
| Norma URPᴾ | <<locked>> | 100% | 42,815 psi | 71% | 2493 fps | 96.3% |
| Ramshot Big Game | <<locked>> | 96% | 52,837 psi | 88% | 2631 fps | 99.2% |
| Ramshot TAC | <<locked>> | 90% | 52,533 psi | 87% | 2556 fps | 97.2% |
| Ramshot Wild Boar | <<locked>> | 90% | 51,372 psi | 85% | 2575 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 88% | 53,592 psi | 89% | 2552 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,635 psi | 58% | 1568 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 52,011 psi | 86% | 2539 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 51,909 psi | 86% | 2556 fps | 96.1% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 53,069 psi | 88% | 2677 fps | 99% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 52,837 psi | 88% | 2707 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 42,496 psi | 71% | 2516 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 90% | 52,823 psi | 88% | 2533 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 51,967 psi | 86% | 2539 fps | 99.7% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 52,127 psi | 87% | 2598 fps | 99.6% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 48,153 psi | 80% | 2500 fps | 96.1% |
| Shooters World Match Rifle | <<locked>> | 92% | 51,285 psi | 85% | 2569 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 52,141 psi | 87% | 2562 fps | 99.8% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 51,851 psi | 86% | 2507 fps | 99.6% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 54,433 psi | 90% | 2579 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 54,070 psi | 90% | 2654 fps | 99.4% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 51,401 psi | 85% | 2490 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 53,925 psi | 90% | 2582 fps | 97.9% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 51,053 psi | 85% | 2559 fps | 99% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 54,041 psi | 90% | 2497 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 53,113 psi | 88% | 2490 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 53,374 psi | 89% | 2585 fps | 99.9% |
| Somchem S335 | <<locked>> | 92% | 52,881 psi | 88% | 2497 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 53,476 psi | 89% | 2579 fps | 99.2% |
| Somchem S355ᴾ | <<locked>> | 100% | 52,997 psi | 88% | 2598 fps | 99.5% |
| Somchem S365ᴾ | <<locked>> | 100% | 38,189 psi | 63% | 2448 fps | 98.4% |
| Vihtavuori N130 | <<locked>> | 88% | 53,809 psi | 89% | 2470 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 53,838 psi | 89% | 2487 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 53,679 psi | 89% | 2549 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 52,301 psi | 87% | 2530 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 51,169 psi | 85% | 2539 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 45,194 psi | 75% | 2497 fps | 96.7% |
| Vihtavuori N530 | <<locked>> | 90% | 52,547 psi | 87% | 2546 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 96% | 53,461 psi | 89% | 2566 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 44,048 psi | 73% | 2500 fps | 96.4% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 46,673 psi | 78% | 2490 fps | 98.8% |
| Winchester 748 | <<locked>> | 90% | 51,329 psi | 85% | 2589 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 94% | 53,853 psi | 89% | 2615 fps | 99.6% |
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 2015 | <<locked>> | 80% | 39,581 psi | 66% | 2303 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 50,778 psi | 84% | 2543 fps | 98.4% |
| Accurate 2460 | <<locked>> | 80% | 42,815 psi | 71% | 2395 fps | 99.8% |
| Accurate 2495 | <<locked>> | 80% | 31,981 psi | 53% | 2218 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 37,913 psi | 63% | 2343 fps | 99.2% |
| Accurate 4064 | <<locked>> | 80% | 30,255 psi | 50% | 2201 fps | 98.4% |
| Accurate 4350 | <<locked>> | 98% | 39,378 psi | 65% | 2444 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 80% | 47,906 psi | 80% | 2375 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 48,283 psi | 80% | 2395 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 36,216 psi | 60% | 2300 fps | 96% |
| ADI AR 2208 | <<locked>> | 86% | 37,159 psi | 62% | 2303 fps | 95.4% |
| ADI AR 2219 | <<locked>> | 80% | 47,413 psi | 79% | 2477 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 38,218 psi | 63% | 2316 fps | 97.8% |
| Alliant AR-Comp | <<locked>> | 80% | 36,869 psi | 61% | 2326 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 43,947 psi | 73% | 2490 fps | 98.6% |
| Alliant Power Pro 2000-MR | 42.7 gr | 86% | 39,711 psi | 66% | 2457 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 36,579 psi | 61% | 2313 fps | 96.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 31,662 psi | 53% | 2228 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 44,904 psi | 75% | 2395 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 36,724 psi | 61% | 2333 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 98% | 40,654 psi | 68% | 2454 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 88% | 33,417 psi | 56% | 2329 fps | 95% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 46,601 psi | 77% | 2375 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 39,885 psi | 66% | 2392 fps | 95.8% |
| Bofors RP3 | <<locked>> | 82% | 30,821 psi | 51% | 2221 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 40,306 psi | 67% | 2316 fps | 98.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 35,926 psi | 60% | 2326 fps | 97.9% |
| Hodgdon CFE223 | 40.7 gr | 80% | 39,668 psi | 66% | 2441 fps | 96.4% |
| Hodgdon H322 | <<locked>> | 80% | 43,555 psi | 72% | 2418 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 44,164 psi | 73% | 2438 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 41,945 psi | 70% | 2425 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 36,448 psi | 61% | 2313 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 34,795 psi | 58% | 2310 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 32,590 psi | 54% | 2274 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,628 psi | 43% | 1368 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 35,230 psi | 59% | 2270 fps | 96.2% |
| IMR 3031 | <<locked>> | 80% | 35,027 psi | 58% | 2316 fps | 99.9% |
| IMR 4064 | <<locked>> | 84% | 36,666 psi | 61% | 2287 fps | 95.5% |
| IMR 4166 Enduron | <<locked>> | 92% | 50,807 psi | 84% | 2497 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 45,527 psi | 76% | 2362 fps | 100% |
| IMR 4831 | <<locked>> | 98% | 38,247 psi | 64% | 2402 fps | 95.3% |
| IMR 4895 | <<locked>> | 82% | 35,056 psi | 58% | 2310 fps | 95.7% |
| IMR 8208 XBR | <<locked>> | 80% | 38,218 psi | 63% | 2316 fps | 97.8% |
| Lovex D073.5 | <<locked>> | 80% | 42,409 psi | 70% | 2392 fps | 99.3% |
| Lovex D073.6 | <<locked>> | 80% | 34,185 psi | 57% | 2280 fps | 98.4% |
| Lovex S060 | <<locked>> | 80% | 37,260 psi | 62% | 2257 fps | 96.3% |
| Lovex S062 | <<locked>> | 80% | 32,010 psi | 53% | 2201 fps | 96.1% |
| Lovex S065 | <<locked>> | 98% | 45,353 psi | 75% | 2457 fps | 95.4% |
| Norma 200 | <<locked>> | 80% | 50,589 psi | 84% | 2451 fps | 100% |
| Norma 201 | <<locked>> | 80% | 35,592 psi | 59% | 2267 fps | 97.2% |
| Norma 202 | <<locked>> | 80% | 35,476 psi | 59% | 2280 fps | 99.1% |
| Norma 203B | <<locked>> | 82% | 33,692 psi | 56% | 2270 fps | 95.2% |
| Norma URP | <<locked>> | 98% | 40,277 psi | 67% | 2444 fps | 95.6% |
| Ramshot Big Game | 41.7 gr | 84% | 35,447 psi | 59% | 2326 fps | 95.4% |
| Ramshot TAC | <<locked>> | 84% | 43,294 psi | 72% | 2408 fps | 95.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 37,115 psi | 62% | 2329 fps | 96.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 41,350 psi | 69% | 2359 fps | 97.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,686 psi | 43% | 1401 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 42,786 psi | 71% | 2398 fps | 99.5% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 48,588 psi | 81% | 2507 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 35,389 psi | 59% | 2365 fps | 95% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 29,457 psi | 49% | 2234 fps | 95.9% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 39,697 psi | 66% | 2461 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 39,175 psi | 65% | 2313 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 80% | 33,939 psi | 56% | 2224 fps | 96.7% |
| Rottweil R 903 | <<locked>> | 84% | 30,966 psi | 51% | 2218 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 98% | 45,353 psi | 75% | 2457 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 34,185 psi | 57% | 2280 fps | 98.4% |
| Shooters World Precision | <<locked>> | 80% | 32,010 psi | 53% | 2201 fps | 96.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 45,208 psi | 75% | 2408 fps | 98.8% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 48,008 psi | 80% | 2490 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 34,635 psi | 58% | 2313 fps | 95.1% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 45,600 psi | 76% | 2408 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 41,075 psi | 68% | 2379 fps | 95.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 34,737 psi | 58% | 2270 fps | 95.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 37,376 psi | 62% | 2241 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,545 psi | 51% | 2119 fps | 98.8% |
| Somchem S321 | <<locked>> | 80% | 40,611 psi | 67% | 2385 fps | 98.6% |
| Somchem S335 | <<locked>> | 80% | 36,753 psi | 61% | 2244 fps | 99.7% |
| Somchem S341 | <<locked>> | 80% | 35,520 psi | 59% | 2280 fps | 95.6% |
| Somchem S355 | <<locked>> | 84% | 32,256 psi | 54% | 2231 fps | 95.2% |
| Somchem S365 | <<locked>> | 92% | 29,834 psi | 50% | 2251 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 42,438 psi | 71% | 2313 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 37,420 psi | 62% | 2244 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 32,576 psi | 54% | 2221 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 33,533 psi | 56% | 2224 fps | 99% |
| Vihtavuori N150 | <<locked>> | 82% | 28,674 psi | 48% | 2129 fps | 95.4% |
| Vihtavuori N160 | <<locked>> | 96% | 39,972 psi | 66% | 2402 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 38,000 psi | 63% | 2310 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 80% | 32,140 psi | 53% | 2208 fps | 98.3% |
| Vihtavuori N550 | <<locked>> | 98% | 41,408 psi | 69% | 2454 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 33,808 psi | 56% | 2247 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 36,666 psi | 61% | 2343 fps | 98.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 33,736 psi | 56% | 2270 fps | 95.8% |
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 94 powders for .308 Win. Ackley Improved loaded with the .308 | 180gr | Norma PlastSpitz. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,707 fps; across all powders the maximum-charge window runs from 1,532 fps to 2,707 fps. Accurate 4350 gives the best case fill at 100 %, and 94 of the 94 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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 2000-MR, Hodgdon CFE223, Ramshot Big Game rank at the top here: for .308 Win. Ackley Improved with the .308 | 180gr | Norma PlastSpitz 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.