Load Specifications
Load data in caliber 7 x 64 Brenneke with .284 | 180gr | Sierra MatchKing bullet and 94 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-26 and Alliant Reloder-16.
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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 52,156 psi | 87% | 2408 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 53,592 psi | 89% | 2474 fps | 98.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,140 psi | 83% | 2510 fps | 99.5% |
| Accurate 4064 | <<locked>> | 84% | 52,504 psi | 87% | 2457 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 52,576 psi | 87% | 2556 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 51,851 psi | 86% | 2631 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 86% | 52,997 psi | 88% | 2490 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 53,722 psi | 89% | 2592 fps | 98.3% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 51,256 psi | 85% | 2582 fps | 96.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 51,430 psi | 85% | 2592 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 53,272 psi | 89% | 2507 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 53,592 psi | 89% | 2526 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 53,563 psi | 89% | 2605 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 54,447 psi | 90% | 2625 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 52,634 psi | 87% | 2582 fps | 98.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 49,690 psi | 83% | 2582 fps | 97.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,094 psi | 78% | 2530 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,147 psi | 68% | 2461 fps | 98.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 53,592 psi | 89% | 2703 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 45,672 psi | 76% | 2513 fps | 96.9% |
| Bofors RP3 | <<locked>> | 86% | 53,983 psi | 90% | 2523 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 49,690 psi | 83% | 2582 fps | 97.9% |
| Bofors RP7 | <<locked>> | 90% | 53,548 psi | 89% | 2510 fps | 99% |
| Hodgdon H380 | <<locked>> | 84% | 51,271 psi | 85% | 2493 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 51,474 psi | 86% | 2552 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 88% | 51,793 psi | 86% | 2520 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 98% | 51,358 psi | 85% | 2536 fps | 96% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 53,780 psi | 89% | 2569 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 53,490 psi | 89% | 2533 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 52,286 psi | 87% | 2523 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 50,879 psi | 85% | 2582 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,274 psi | 60% | 1539 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 53,359 psi | 89% | 2490 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 52,489 psi | 87% | 2474 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 51,634 psi | 86% | 2454 fps | 99.1% |
| IMR 4350 | <<locked>> | 92% | 50,952 psi | 85% | 2490 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 52,025 psi | 86% | 2487 fps | 99.1% |
| IMR 4831 | <<locked>> | 94% | 53,011 psi | 88% | 2546 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 51,706 psi | 86% | 2507 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 53,417 psi | 89% | 2530 fps | 96.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 48,805 psi | 81% | 2559 fps | 96.2% |
| Lovex S060 | <<locked>> | 82% | 54,215 psi | 90% | 2457 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 52,649 psi | 87% | 2467 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 52,011 psi | 86% | 2487 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 53,040 psi | 88% | 2523 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,582 psi | 69% | 2375 fps | 98.3% |
| Norma 201 | <<locked>> | 82% | 53,882 psi | 90% | 2474 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,404 psi | 90% | 2467 fps | 100% |
| Norma 203B | <<locked>> | 84% | 52,881 psi | 88% | 2513 fps | 100% |
| Norma 204 | <<locked>> | 92% | 51,242 psi | 85% | 2536 fps | 97.8% |
| Norma MRPᴾ | <<locked>> | 100% | 52,779 psi | 88% | 2661 fps | 99.4% |
| Norma URP | <<locked>> | 92% | 51,576 psi | 86% | 2543 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 53,388 psi | 89% | 2539 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 48,646 psi | 81% | 2566 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 94% | 53,693 psi | 89% | 2592 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 43,352 psi | 72% | 2457 fps | 97% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,825 psi | 61% | 1575 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 51,329 psi | 85% | 2480 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,273 psi | 90% | 2621 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 52,098 psi | 87% | 2575 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 54,447 psi | 90% | 2651 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 39,784 psi | 66% | 2467 fps | 96.8% |
| Rottweil R 902 | <<locked>> | 82% | 51,300 psi | 85% | 2431 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,186 psi | 90% | 2520 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 51,938 psi | 86% | 2513 fps | 96.9% |
| Rottweil R 905 | <<locked>> | 98% | 52,025 psi | 86% | 2569 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 90% | 53,548 psi | 89% | 2510 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 90% | 52,011 psi | 86% | 2487 fps | 99.7% |
| Shooters World Precision | <<locked>> | 84% | 52,649 psi | 87% | 2467 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 53,040 psi | 88% | 2523 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 52,214 psi | 87% | 2530 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 53,621 psi | 89% | 2503 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 52,359 psi | 87% | 2375 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 51,677 psi | 86% | 2444 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 51,547 psi | 86% | 2566 fps | 98.2% |
| Somchem S335 | <<locked>> | 82% | 54,462 psi | 90% | 2408 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,215 psi | 90% | 2513 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 53,577 psi | 89% | 2513 fps | 96.4% |
| Somchem S365 | <<locked>> | 96% | 53,911 psi | 90% | 2589 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 52,649 psi | 87% | 2549 fps | 98.9% |
| Vihtavuori N135 | <<locked>> | 82% | 51,677 psi | 86% | 2398 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 51,851 psi | 86% | 2415 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 52,112 psi | 87% | 2451 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 53,635 psi | 89% | 2536 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,573 psi | 81% | 2477 fps | 98% |
| Vihtavuori N540 | <<locked>> | 84% | 53,287 psi | 89% | 2454 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 52,678 psi | 88% | 2543 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 52,721 psi | 88% | 2595 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 53,316 psi | 89% | 2648 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 53,258 psi | 88% | 2513 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 51,474 psi | 86% | 2552 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,235 psi | 70% | 2575 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 53,592 psi | 89% | 2510 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 52,576 psi | 87% | 2539 fps | 98.1% |
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 2495 | <<locked>> | 80% | 48,907 psi | 81% | 2365 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,108 psi | 78% | 2375 fps | 97.8% |
| Accurate 3100 | <<locked>> | 86% | 31,328 psi | 52% | 2172 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 46,325 psi | 77% | 2375 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,925 psi | 58% | 2257 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 98% | 48,269 psi | 80% | 2575 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 44,019 psi | 73% | 2352 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 41,437 psi | 69% | 2388 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 98% | 48,037 psi | 80% | 2530 fps | 95.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,196 psi | 80% | 2546 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,208 psi | 73% | 2372 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,355 psi | 79% | 2434 fps | 100% |
| Alliant Reloder-16 | 39.5 gr | 80% | 34,374 psi | 57% | 2267 fps | 98.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,740 psi | 64% | 2379 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 41,104 psi | 68% | 2385 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 40,857 psi | 68% | 2425 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,121 psi | 42% | 2054 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 92% | 32,039 psi | 53% | 2254 fps | 95.8% |
| Alliant Reloder-26 | 44.7 gr | 82% | 28,326 psi | 47% | 2198 fps | 95% |
| Bofors RP15 | <<locked>> | 96% | 40,292 psi | 67% | 2415 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 44,280 psi | 74% | 2382 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 40,857 psi | 68% | 2425 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 39,508 psi | 66% | 2274 fps | 96.2% |
| Hodgdon H380 | <<locked>> | 80% | 44,918 psi | 75% | 2395 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 80% | 37,072 psi | 62% | 2303 fps | 96.2% |
| Hodgdon H4350 | <<locked>> | 80% | 39,929 psi | 66% | 2316 fps | 95.6% |
| Hodgdon H4831 | <<locked>> | 96% | 48,182 psi | 80% | 2484 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 47,297 psi | 79% | 2470 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,010 psi | 53% | 2175 fps | 98.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,805 psi | 81% | 2474 fps | 100% |
| Hodgdon Superformance | <<locked>> | 80% | 35,824 psi | 60% | 2303 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,151 psi | 45% | 1371 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,183 psi | 83% | 2448 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,296 psi | 77% | 2382 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,573 psi | 81% | 2408 fps | 98.7% |
| IMR 4350 | <<locked>> | 82% | 37,420 psi | 62% | 2257 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,756 psi | 68% | 2300 fps | 97% |
| IMR 4831 | <<locked>> | 80% | 33,663 psi | 56% | 2218 fps | 97.9% |
| IMR 4895 | <<locked>> | 80% | 48,544 psi | 81% | 2461 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 47,224 psi | 78% | 2434 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 98% | 45,774 psi | 76% | 2507 fps | 95.3% |
| Lovex S060 | <<locked>> | 80% | 51,010 psi | 85% | 2415 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,514 psi | 77% | 2379 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,305 psi | 64% | 2257 fps | 97.8% |
| Lovex S070 | <<locked>> | 80% | 36,651 psi | 61% | 2241 fps | 96.2% |
| Lovex S071 | <<locked>> | 92% | 32,372 psi | 54% | 2195 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 50,647 psi | 84% | 2431 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,111 psi | 85% | 2428 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,702 psi | 78% | 2425 fps | 100% |
| Norma 204 | <<locked>> | 86% | 42,090 psi | 70% | 2382 fps | 95.6% |
| Norma MRP | <<locked>> | 88% | 35,143 psi | 58% | 2336 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 35,056 psi | 58% | 2257 fps | 98.1% |
| Ramshot Big Game | <<locked>> | 80% | 46,876 psi | 78% | 2448 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 45,513 psi | 76% | 2513 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 33,823 psi | 56% | 2241 fps | 96% |
| Ramshot Magnum | <<locked>> | 96% | 37,492 psi | 62% | 2346 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,456 psi | 46% | 1404 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,918 psi | 75% | 2379 fps | 98.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,176 psi | 68% | 2428 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,476 psi | 57% | 2270 fps | 97.8% |
| ReloadSwiss RS 70 | 43.3 gr | 80% | 34,011 psi | 57% | 2280 fps | 97.1% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 37,159 psi | 62% | 2408 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 48,486 psi | 81% | 2392 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,945 psi | 70% | 2339 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 45,788 psi | 76% | 2418 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 90% | 39,871 psi | 66% | 2365 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 39,508 psi | 66% | 2274 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,305 psi | 64% | 2257 fps | 97.8% |
| Shooters World Precision | <<locked>> | 80% | 46,514 psi | 77% | 2379 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,651 psi | 61% | 2241 fps | 96.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,772 psi | 71% | 2385 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,140 psi | 83% | 2454 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,511 psi | 72% | 2257 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,507 psi | 62% | 2208 fps | 96.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 39,494 psi | 66% | 2362 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 51,285 psi | 85% | 2369 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,279 psi | 70% | 2336 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 50,125 psi | 83% | 2461 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 31,517 psi | 52% | 2218 fps | 99.6% |
| Somchem S385 | <<locked>> | 88% | 38,189 psi | 63% | 2306 fps | 95.8% |
| Vihtavuori N135 | <<locked>> | 80% | 48,457 psi | 81% | 2356 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,762 psi | 81% | 2372 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,451 psi | 67% | 2277 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,347 psi | 60% | 2254 fps | 98.3% |
| Vihtavuori N165 | <<locked>> | 92% | 37,376 psi | 62% | 2283 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 46,949 psi | 78% | 2369 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,839 psi | 60% | 2257 fps | 98% |
| Vihtavuori N555 | <<locked>> | 80% | 27,311 psi | 45% | 2119 fps | 96.1% |
| Vihtavuori N560 | <<locked>> | 96% | 46,470 psi | 77% | 2536 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,549 psi | 59% | 2231 fps | 99.6% |
| Winchester 760 | <<locked>> | 80% | 37,072 psi | 62% | 2303 fps | 96.2% |
| Winchester StaBALL HD | <<locked>> | 82% | 23,656 psi | 39% | 2077 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,082 psi | 83% | 2464 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 40,147 psi | 67% | 2339 fps | 95.1% |
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 101 powders for 7 x 64 Brenneke loaded with the .284 | 180gr | Sierra MatchKing. Alliant Reloder-26 delivers the highest muzzle velocity at 2,703 fps; across all powders the maximum-charge window runs from 1,539 fps to 2,703 fps. Accurate 3100 gives the best case fill at 100 %, and 101 of the 101 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 180.0 gr projectile in 0.284" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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. ReloadSwiss RS 70, Alliant Reloder-26, Alliant Reloder-16 rank at the top here: for 7 x 64 Brenneke with the .284 | 180gr | Sierra MatchKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, ADI AR 2225, Baschieri & Pellagri 109 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.