Load Specifications
Load data in caliber .308 Win. Ackley Improved with .3085 | 190gr | Prvi Partizan HP BT 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, Hodgdon CFE223 and ReloadSwiss RS 52.
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% | 53,954 psi | 90% | 2425 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 54,172 psi | 90% | 2507 fps | 99.1% |
| Accurate 2460 | <<locked>> | 86% | 52,359 psi | 87% | 2448 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 54,027 psi | 90% | 2477 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 53,795 psi | 89% | 2503 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 53,708 psi | 89% | 2513 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 42,264 psi | 70% | 2418 fps | 96.8% |
| Accurate LT-30 | <<locked>> | 84% | 54,389 psi | 90% | 2379 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 51,459 psi | 85% | 2356 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 52,997 psi | 88% | 2507 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 98% | 53,867 psi | 89% | 2500 fps | 99.1% |
| ADI AR 2219 | <<locked>> | 84% | 54,462 psi | 90% | 2487 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 52,475 psi | 87% | 2467 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 90% | 51,764 psi | 86% | 2451 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 53,809 psi | 89% | 2559 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 52,040 psi | 86% | 2595 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 52,475 psi | 87% | 2513 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 86% | 54,070 psi | 90% | 2431 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 53,403 psi | 89% | 2533 fps | 99.2% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 43,395 psi | 72% | 2428 fps | 97% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 49,559 psi | 82% | 2566 fps | 99.5% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 53,055 psi | 88% | 2379 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 52,315 psi | 87% | 2516 fps | 98.7% |
| Bofors RP3 | <<locked>> | 98% | 52,663 psi | 87% | 2526 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 88% | 51,634 psi | 86% | 2415 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 92% | 54,027 psi | 90% | 2536 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 52,243 psi | 87% | 2572 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 86% | 52,910 psi | 88% | 2467 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 53,998 psi | 90% | 2493 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 51,198 psi | 85% | 2490 fps | 97.9% |
| Hodgdon H4895 | <<locked>> | 92% | 53,447 psi | 89% | 2516 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 39,523 psi | 66% | 2329 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 51,387 psi | 85% | 2536 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,534 psi | 57% | 1476 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 51,416 psi | 85% | 2470 fps | 99.5% |
| IMR 3031 | <<locked>> | 92% | 52,315 psi | 87% | 2503 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 53,301 psi | 89% | 2484 fps | 99.2% |
| IMR 4198 | <<locked>> | 84% | 51,590 psi | 86% | 2359 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 52,997 psi | 88% | 2477 fps | 95.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 40,756 psi | 68% | 2372 fps | 96.4% |
| IMR 4895 | <<locked>> | 94% | 51,721 psi | 86% | 2523 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 90% | 52,475 psi | 87% | 2467 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 86% | 52,359 psi | 87% | 2457 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 51,474 psi | 86% | 2484 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 53,301 psi | 89% | 2441 fps | 99.4% |
| Lovex S062 | <<locked>> | 96% | 52,562 psi | 87% | 2484 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 48,486 psi | 81% | 2425 fps | 96.5% |
| Norma 200 | <<locked>> | 82% | 54,085 psi | 90% | 2408 fps | 100% |
| Norma 201 | <<locked>> | 92% | 51,779 psi | 86% | 2457 fps | 99.8% |
| Norma 202 | <<locked>> | 92% | 51,938 psi | 86% | 2464 fps | 100% |
| Norma 203B | <<locked>> | 96% | 52,533 psi | 87% | 2523 fps | 99.4% |
| Norma URPᴾ | <<locked>> | 100% | 43,178 psi | 72% | 2421 fps | 96.8% |
| Ramshot Big Game | <<locked>> | 96% | 53,113 psi | 88% | 2549 fps | 99.4% |
| Ramshot TAC | <<locked>> | 90% | 52,808 psi | 88% | 2477 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 90% | 51,634 psi | 86% | 2493 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 88% | 53,621 psi | 89% | 2467 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,838 psi | 58% | 1509 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 52,054 psi | 86% | 2454 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 52,054 psi | 86% | 2474 fps | 96.5% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 53,055 psi | 88% | 2592 fps | 99.2% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 52,939 psi | 88% | 2621 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 42,627 psi | 71% | 2438 fps | 96.4% |
| Rottweil R 901 | <<locked>> | 90% | 53,084 psi | 88% | 2448 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 51,837 psi | 86% | 2451 fps | 99.8% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 52,605 psi | 87% | 2520 fps | 99.7% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 48,486 psi | 81% | 2425 fps | 96.5% |
| Shooters World Match Rifle | <<locked>> | 92% | 51,474 psi | 86% | 2484 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 52,562 psi | 87% | 2484 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 51,982 psi | 86% | 2425 fps | 99.7% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 51,329 psi | 85% | 2451 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 54,389 psi | 90% | 2572 fps | 99.5% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 51,634 psi | 86% | 2408 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 54,346 psi | 90% | 2503 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 54,447 psi | 90% | 2523 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 54,027 psi | 90% | 2411 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 53,447 psi | 89% | 2408 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 53,505 psi | 89% | 2500 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 53,069 psi | 88% | 2411 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 53,577 psi | 89% | 2497 fps | 99.4% |
| Somchem S355ᴾ | <<locked>> | 100% | 53,330 psi | 89% | 2520 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 38,276 psi | 64% | 2372 fps | 98.7% |
| Vihtavuori N130 | <<locked>> | 88% | 53,925 psi | 90% | 2385 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 53,853 psi | 89% | 2398 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 53,983 psi | 90% | 2467 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 52,344 psi | 87% | 2444 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 51,605 psi | 86% | 2461 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 45,295 psi | 75% | 2418 fps | 97.1% |
| Vihtavuori N530 | <<locked>> | 90% | 52,837 psi | 88% | 2467 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 96% | 53,867 psi | 89% | 2487 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 44,266 psi | 74% | 2425 fps | 96.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 46,586 psi | 77% | 2408 fps | 99% |
| Winchester 748 | <<locked>> | 90% | 51,503 psi | 86% | 2507 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 94% | 53,954 psi | 90% | 2530 fps | 99.8% |
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% | 39,610 psi | 66% | 2224 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 50,749 psi | 84% | 2457 fps | 98.6% |
| Accurate 2460 | <<locked>> | 80% | 42,989 psi | 71% | 2313 fps | 99.9% |
| Accurate 2495 | <<locked>> | 80% | 32,140 psi | 53% | 2146 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 38,058 psi | 63% | 2270 fps | 99.4% |
| Accurate 4064 | <<locked>> | 80% | 30,414 psi | 51% | 2133 fps | 98.7% |
| Accurate 4350 | <<locked>> | 96% | 36,796 psi | 61% | 2320 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 80% | 48,283 psi | 80% | 2300 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 48,631 psi | 81% | 2316 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 36,434 psi | 61% | 2228 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 84% | 35,230 psi | 59% | 2188 fps | 95.1% |
| ADI AR 2219 | <<locked>> | 80% | 47,819 psi | 79% | 2398 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 38,377 psi | 64% | 2244 fps | 98.2% |
| Alliant AR-Comp | <<locked>> | 80% | 36,970 psi | 61% | 2247 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 44,222 psi | 73% | 2415 fps | 98.8% |
| Alliant Power Pro 2000-MR | 40 gr | 84% | 37,246 psi | 62% | 2329 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 29,892 psi | 50% | 2113 fps | 95.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 45,179 psi | 75% | 2313 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 34,563 psi | 57% | 2215 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 96% | 38,363 psi | 64% | 2333 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 88% | 33,620 psi | 56% | 2260 fps | 95.6% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 46,833 psi | 78% | 2297 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 37,681 psi | 63% | 2274 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 29,124 psi | 48% | 2110 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 40,422 psi | 67% | 2241 fps | 98.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 36,129 psi | 60% | 2254 fps | 98.2% |
| Hodgdon CFE223 | 39 gr | 80% | 39,726 psi | 66% | 2362 fps | 96.8% |
| Hodgdon H322 | <<locked>> | 80% | 43,816 psi | 73% | 2339 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 44,121 psi | 73% | 2356 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 39,305 psi | 65% | 2300 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 36,666 psi | 61% | 2241 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 32,938 psi | 55% | 2195 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 32,692 psi | 54% | 2205 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,686 psi | 43% | 1316 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 35,389 psi | 59% | 2201 fps | 96.6% |
| IMR 3031 | <<locked>> | 80% | 35,404 psi | 59% | 2247 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 34,621 psi | 58% | 2172 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 45,905 psi | 76% | 2283 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 49,792 psi | 83% | 2431 fps | 95.1% |
| IMR 4831 | <<locked>> | 98% | 38,508 psi | 64% | 2329 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 33,141 psi | 55% | 2192 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 80% | 38,377 psi | 64% | 2244 fps | 98.2% |
| Lovex D073.5 | <<locked>> | 80% | 42,699 psi | 71% | 2316 fps | 99.5% |
| Lovex D073.6 | <<locked>> | 80% | 34,534 psi | 57% | 2211 fps | 98.8% |
| Lovex S060 | <<locked>> | 80% | 37,318 psi | 62% | 2182 fps | 96.7% |
| Lovex S062 | <<locked>> | 80% | 32,111 psi | 53% | 2133 fps | 96.5% |
| Lovex S065 | <<locked>> | 96% | 42,815 psi | 71% | 2333 fps | 95.1% |
| Norma 200 | <<locked>> | 80% | 50,749 psi | 84% | 2365 fps | 100% |
| Norma 201 | <<locked>> | 80% | 35,723 psi | 59% | 2192 fps | 97.6% |
| Norma 202 | <<locked>> | 80% | 35,650 psi | 59% | 2208 fps | 99.4% |
| Norma 203B | <<locked>> | 82% | 33,968 psi | 56% | 2205 fps | 95.7% |
| Norma URP | <<locked>> | 96% | 38,043 psi | 63% | 2326 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 82% | 33,475 psi | 56% | 2208 fps | 95% |
| Ramshot TAC | <<locked>> | 84% | 43,497 psi | 72% | 2333 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 37,057 psi | 62% | 2254 fps | 96.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 41,568 psi | 69% | 2283 fps | 97.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,788 psi | 43% | 1348 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 43,091 psi | 72% | 2323 fps | 99.7% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 45,658 psi | 76% | 2379 fps | 95% |
| ReloadSwiss RS 52 | 37.9 gr | 82% | 35,563 psi | 59% | 2290 fps | 95.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 27,702 psi | 46% | 2116 fps | 95.4% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 39,668 psi | 66% | 2385 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 39,436 psi | 66% | 2241 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 80% | 34,011 psi | 57% | 2152 fps | 97.1% |
| Rottweil R 903 | <<locked>> | 84% | 31,270 psi | 52% | 2156 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 96% | 42,815 psi | 71% | 2333 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 34,534 psi | 57% | 2211 fps | 98.8% |
| Shooters World Precision | <<locked>> | 80% | 32,111 psi | 53% | 2133 fps | 96.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 45,426 psi | 75% | 2333 fps | 99.1% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 47,935 psi | 80% | 2405 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 34,751 psi | 58% | 2244 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 45,629 psi | 76% | 2326 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 41,249 psi | 69% | 2303 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 35,041 psi | 58% | 2201 fps | 95.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 37,376 psi | 62% | 2165 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,530 psi | 51% | 2047 fps | 99% |
| Somchem S321 | <<locked>> | 80% | 40,901 psi | 68% | 2310 fps | 98.9% |
| Somchem S335 | <<locked>> | 80% | 36,883 psi | 61% | 2172 fps | 99.8% |
| Somchem S341 | <<locked>> | 80% | 35,723 psi | 59% | 2211 fps | 96.1% |
| Somchem S355 | <<locked>> | 84% | 32,547 psi | 54% | 2165 fps | 95.7% |
| Somchem S365 | <<locked>> | 92% | 29,805 psi | 50% | 2178 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 42,409 psi | 70% | 2231 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 37,405 psi | 62% | 2169 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 32,619 psi | 54% | 2146 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 33,678 psi | 56% | 2152 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 80% | 27,064 psi | 45% | 2021 fps | 95.1% |
| Vihtavuori N160 | <<locked>> | 94% | 37,724 psi | 63% | 2283 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 38,232 psi | 64% | 2238 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 80% | 32,416 psi | 54% | 2142 fps | 98.6% |
| Vihtavuori N550 | <<locked>> | 96% | 39,015 psi | 65% | 2333 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 33,750 psi | 56% | 2175 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 37,028 psi | 62% | 2274 fps | 98.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 33,895 psi | 56% | 2198 fps | 96.3% |
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 .3085 | 190gr | Prvi Partizan HP BT. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,621 fps; across all powders the maximum-charge window runs from 1,476 fps to 2,621 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 190.0 gr projectile in 0.3085" calls for a 1:13.0 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, ReloadSwiss RS 52 rank at the top here: for .308 Win. Ackley Improved with the .3085 | 190gr | Prvi Partizan HP BT 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.