Load Specifications
Load data in caliber .308 Win. Ackley Improved with .308 | 185gr | Berger Juggernaut Target bullet and 93 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, ReloadSwiss RS 52 and Hodgdon CFE223.
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% | 52,866 psi | 88% | 2444 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 53,185 psi | 88% | 2523 fps | 98.7% |
| Accurate 2230 | <<locked>> | 82% | 53,969 psi | 90% | 2536 fps | 99.1% |
| Accurate 2460 | <<locked>> | 86% | 51,343 psi | 85% | 2467 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 52,736 psi | 88% | 2497 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 52,243 psi | 87% | 2516 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 52,040 psi | 86% | 2530 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 41,075 psi | 68% | 2428 fps | 96.1% |
| Accurate LT-30 | <<locked>> | 84% | 53,577 psi | 89% | 2402 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 53,969 psi | 90% | 2421 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 51,634 psi | 86% | 2520 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 98% | 52,475 psi | 87% | 2513 fps | 98.7% |
| ADI AR 2219 | <<locked>> | 84% | 53,432 psi | 89% | 2507 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 54,447 psi | 90% | 2526 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 92% | 53,766 psi | 89% | 2513 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 52,286 psi | 87% | 2572 fps | 99.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 54,317 psi | 90% | 2661 fps | 99% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 52,185 psi | 87% | 2530 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 51,401 psi | 85% | 2533 fps | 99.6% |
| Alliant Reloder-10x | <<locked>> | 86% | 53,040 psi | 88% | 2454 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 52,330 psi | 87% | 2549 fps | 98.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 42,235 psi | 70% | 2438 fps | 96.2% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 48,472 psi | 81% | 2579 fps | 99.2% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 52,199 psi | 87% | 2402 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 50,908 psi | 85% | 2526 fps | 98.2% |
| Bofors RP3 | <<locked>> | 98% | 51,488 psi | 86% | 2546 fps | 99.7% |
| Hodgdon Benchmark | <<locked>> | 90% | 53,621 psi | 89% | 2474 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 92% | 52,852 psi | 88% | 2556 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 51,126 psi | 85% | 2589 fps | 98.8% |
| Hodgdon H322 | <<locked>> | 86% | 51,866 psi | 86% | 2487 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 52,939 psi | 88% | 2513 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 53,069 psi | 88% | 2549 fps | 97.9% |
| Hodgdon H4895 | <<locked>> | 92% | 52,011 psi | 86% | 2530 fps | 99.5% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 38,406 psi | 64% | 2336 fps | 97% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 53,563 psi | 89% | 2598 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,447 psi | 57% | 1493 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 53,664 psi | 89% | 2533 fps | 99.6% |
| IMR 3031 | <<locked>> | 94% | 54,273 psi | 90% | 2566 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 51,895 psi | 86% | 2497 fps | 98.8% |
| IMR 4198 | <<locked>> | 86% | 53,708 psi | 89% | 2418 fps | 100% |
| IMR 4895 | <<locked>> | 96% | 53,563 psi | 89% | 2579 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 92% | 54,447 psi | 90% | 2526 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 86% | 50,908 psi | 85% | 2470 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 94% | 53,708 psi | 89% | 2546 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 52,431 psi | 87% | 2461 fps | 99.2% |
| Lovex S062 | <<locked>> | 98% | 54,447 psi | 90% | 2543 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 47,137 psi | 78% | 2434 fps | 95.9% |
| Norma 200 | <<locked>> | 82% | 52,692 psi | 88% | 2425 fps | 100% |
| Norma 201 | <<locked>> | 94% | 53,722 psi | 89% | 2516 fps | 99.9% |
| Norma 202 | <<locked>> | 94% | 53,867 psi | 89% | 2523 fps | 100% |
| Norma 203B | <<locked>> | 96% | 51,387 psi | 85% | 2539 fps | 99.2% |
| Norma URPᴾ | <<locked>> | 100% | 41,930 psi | 70% | 2428 fps | 96.1% |
| Ramshot Big Game | <<locked>> | 96% | 51,634 psi | 86% | 2562 fps | 99% |
| Ramshot TAC | <<locked>> | 90% | 51,808 psi | 86% | 2493 fps | 97.1% |
| Ramshot Wild Boar | <<locked>> | 92% | 53,795 psi | 89% | 2556 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 88% | 52,663 psi | 87% | 2487 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,418 psi | 57% | 1526 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 54,360 psi | 90% | 2516 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 54,317 psi | 90% | 2536 fps | 96.6% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 51,837 psi | 86% | 2608 fps | 98.9% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 51,866 psi | 86% | 2638 fps | 100% |
| Rottweil R 901 | <<locked>> | 90% | 51,721 psi | 86% | 2464 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 54,114 psi | 90% | 2513 fps | 99.9% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 50,923 psi | 85% | 2530 fps | 99.5% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 47,137 psi | 78% | 2434 fps | 95.9% |
| Shooters World Match Rifle | <<locked>> | 94% | 53,708 psi | 89% | 2546 fps | 100% |
| Shooters World Precision | <<locked>> | 98% | 54,447 psi | 90% | 2543 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 54,375 psi | 90% | 2490 fps | 99.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 54,447 psi | 90% | 2182 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 53,563 psi | 89% | 2516 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 52,881 psi | 88% | 2585 fps | 99.2% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 53,708 psi | 89% | 2467 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 52,837 psi | 88% | 2513 fps | 97.8% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 53,374 psi | 89% | 2539 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 53,055 psi | 88% | 2431 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 52,083 psi | 87% | 2425 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 52,098 psi | 87% | 2516 fps | 99.8% |
| Somchem S335 | <<locked>> | 92% | 51,764 psi | 86% | 2431 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 52,141 psi | 87% | 2510 fps | 99.1% |
| Somchem S355ᴾ | <<locked>> | 100% | 51,837 psi | 86% | 2530 fps | 99.4% |
| Somchem S365ᴾ | <<locked>> | 100% | 37,144 psi | 62% | 2379 fps | 98.1% |
| Vihtavuori N130 | <<locked>> | 88% | 52,997 psi | 88% | 2408 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 52,823 psi | 88% | 2421 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 52,837 psi | 88% | 2490 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 54,259 psi | 90% | 2503 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 50,140 psi | 83% | 2474 fps | 99.8% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 44,353 psi | 74% | 2431 fps | 96.5% |
| Vihtavuori N530 | <<locked>> | 90% | 51,779 psi | 86% | 2487 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 96% | 52,359 psi | 87% | 2500 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 43,221 psi | 72% | 2434 fps | 96.2% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 45,730 psi | 76% | 2425 fps | 98.6% |
| Winchester 748 | <<locked>> | 92% | 53,650 psi | 89% | 2569 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 94% | 52,779 psi | 88% | 2549 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% | 38,783 psi | 64% | 2244 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 49,821 psi | 83% | 2474 fps | 98.3% |
| Accurate 2230 | <<locked>> | 80% | 50,198 psi | 83% | 2484 fps | 98.6% |
| Accurate 2460 | <<locked>> | 80% | 41,756 psi | 69% | 2326 fps | 99.8% |
| Accurate 2495 | <<locked>> | 80% | 31,270 psi | 52% | 2162 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 37,188 psi | 62% | 2283 fps | 99.1% |
| Accurate 4064 | <<locked>> | 80% | 29,617 psi | 49% | 2142 fps | 98.2% |
| Accurate 4350 | <<locked>> | 98% | 38,334 psi | 64% | 2379 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 47,181 psi | 78% | 2316 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 47,558 psi | 79% | 2333 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 80% | 35,708 psi | 59% | 2244 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 86% | 36,521 psi | 61% | 2244 fps | 95.2% |
| ADI AR 2219 | <<locked>> | 80% | 46,528 psi | 77% | 2415 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 37,666 psi | 63% | 2260 fps | 97.7% |
| Alliant AR-Comp | <<locked>> | 80% | 36,100 psi | 60% | 2267 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 43,236 psi | 72% | 2428 fps | 98.5% |
| Alliant Power Pro 2000-MR | 40.9 gr | 86% | 38,870 psi | 65% | 2392 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 36,027 psi | 60% | 2257 fps | 96.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 30,937 psi | 51% | 2169 fps | 95.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 43,976 psi | 73% | 2329 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 35,810 psi | 59% | 2267 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 98% | 39,972 psi | 66% | 2392 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 90% | 35,027 psi | 58% | 2320 fps | 95.7% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 46,021 psi | 76% | 2316 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 39,218 psi | 65% | 2333 fps | 95.6% |
| Bofors RP3 | <<locked>> | 82% | 30,095 psi | 50% | 2162 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 39,711 psi | 66% | 2257 fps | 98.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 35,302 psi | 59% | 2267 fps | 97.8% |
| Hodgdon CFE223 | 39 gr | 80% | 38,841 psi | 65% | 2375 fps | 96.2% |
| Hodgdon H322 | <<locked>> | 80% | 42,612 psi | 71% | 2356 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 43,207 psi | 72% | 2372 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 90% | 41,002 psi | 68% | 2359 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 35,882 psi | 60% | 2254 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 34,069 psi | 57% | 2247 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 31,778 psi | 53% | 2211 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,324 psi | 42% | 1329 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 34,461 psi | 57% | 2208 fps | 96% |
| IMR 3031 | <<locked>> | 80% | 34,287 psi | 57% | 2257 fps | 99.9% |
| IMR 4064 | <<locked>> | 84% | 35,897 psi | 60% | 2224 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 45,121 psi | 75% | 2306 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 34,316 psi | 57% | 2247 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 80% | 37,666 psi | 63% | 2260 fps | 97.7% |
| Lovex D073.5 | <<locked>> | 80% | 41,785 psi | 69% | 2333 fps | 99.2% |
| Lovex D073.6 | <<locked>> | 80% | 33,417 psi | 56% | 2221 fps | 98.3% |
| Lovex S060 | <<locked>> | 80% | 36,695 psi | 61% | 2198 fps | 96.1% |
| Lovex S062 | <<locked>> | 80% | 31,430 psi | 52% | 2146 fps | 95.9% |
| Lovex S065 | <<locked>> | 98% | 44,338 psi | 74% | 2388 fps | 95.2% |
| Norma 200 | <<locked>> | 80% | 49,821 psi | 83% | 2388 fps | 100% |
| Norma 201 | <<locked>> | 80% | 34,983 psi | 58% | 2208 fps | 97.1% |
| Norma 202 | <<locked>> | 80% | 34,867 psi | 58% | 2221 fps | 99.1% |
| Norma 203B | <<locked>> | 84% | 35,143 psi | 58% | 2257 fps | 95.7% |
| Norma URP | <<locked>> | 98% | 39,363 psi | 65% | 2382 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 84% | 34,838 psi | 58% | 2267 fps | 95.1% |
| Ramshot TAC | <<locked>> | 86% | 45,295 psi | 75% | 2392 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 36,245 psi | 60% | 2267 fps | 95.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 40,828 psi | 68% | 2300 fps | 97.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,686 psi | 43% | 1365 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 42,279 psi | 70% | 2339 fps | 99.5% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 47,587 psi | 79% | 2438 fps | 95.1% |
| ReloadSwiss RS 52 | 38.8 gr | 84% | 37,101 psi | 62% | 2352 fps | 95.7% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 28,848 psi | 48% | 2172 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 38,667 psi | 64% | 2257 fps | 99.4% |
| Rottweil R 902 | <<locked>> | 80% | 33,301 psi | 55% | 2165 fps | 96.5% |
| Rottweil R 903 | <<locked>> | 86% | 32,343 psi | 54% | 2205 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 98% | 44,338 psi | 74% | 2388 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 33,417 psi | 56% | 2221 fps | 98.3% |
| Shooters World Precision | <<locked>> | 80% | 31,430 psi | 52% | 2146 fps | 95.9% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 44,614 psi | 74% | 2349 fps | 98.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 51,474 psi | 86% | 2146 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 46,978 psi | 78% | 2425 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 36,158 psi | 60% | 2300 fps | 95.8% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 44,715 psi | 74% | 2346 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 43,047 psi | 72% | 2365 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 34,069 psi | 57% | 2211 fps | 95.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 36,666 psi | 61% | 2182 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,936 psi | 50% | 2064 fps | 98.7% |
| Somchem S321 | <<locked>> | 80% | 40,030 psi | 67% | 2326 fps | 98.5% |
| Somchem S335 | <<locked>> | 80% | 36,187 psi | 60% | 2188 fps | 99.6% |
| Somchem S341 | <<locked>> | 80% | 34,925 psi | 58% | 2221 fps | 95.4% |
| Somchem S355 | <<locked>> | 84% | 31,560 psi | 52% | 2172 fps | 95% |
| Somchem S365 | <<locked>> | 94% | 31,038 psi | 52% | 2238 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 41,684 psi | 69% | 2251 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 36,666 psi | 61% | 2185 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 31,836 psi | 53% | 2162 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 32,924 psi | 55% | 2165 fps | 98.9% |
| Vihtavuori N150 | <<locked>> | 82% | 28,050 psi | 47% | 2073 fps | 95.1% |
| Vihtavuori N160 | <<locked>> | 96% | 39,015 psi | 65% | 2336 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 37,188 psi | 62% | 2247 fps | 97.7% |
| Vihtavuori N540 | <<locked>> | 80% | 31,473 psi | 52% | 2152 fps | 98.2% |
| Vihtavuori N550 | <<locked>> | 98% | 40,306 psi | 67% | 2385 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 35,128 psi | 58% | 2231 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 35,955 psi | 60% | 2283 fps | 98.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 33,141 psi | 55% | 2211 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 93 powders for .308 Win. Ackley Improved loaded with the .308 | 185gr | Berger Juggernaut Target. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,661 fps; across all powders the maximum-charge window runs from 1,493 fps to 2,661 fps. Accurate 4350 gives the best case fill at 100 %, and 93 of the 93 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 185.0 gr projectile in 0.308" calls for a 1:12.0 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, ReloadSwiss RS 52, Hodgdon CFE223 rank at the top here: for .308 Win. Ackley Improved with the .308 | 185gr | Berger Juggernaut Target 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.