Load Specifications
Load data in caliber 7 x 64 Brenneke with .284 | 145gr | Fox Classic Hunter 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 Reloder-17, ReloadSwiss RS 60 and Hodgdon H414.
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>> | 84% | 53,824 psi | 89% | 2694 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 52,040 psi | 86% | 2710 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 54,302 psi | 90% | 2782 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 52,025 psi | 86% | 2713 fps | 96.4% |
| Accurate 4064 | <<locked>> | 90% | 52,141 psi | 87% | 2759 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 52,098 psi | 87% | 2838 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 86% | 53,330 psi | 89% | 2795 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 92% | 54,389 psi | 90% | 2795 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 52,214 psi | 87% | 2743 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 52,895 psi | 88% | 2723 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 52,881 psi | 88% | 2910 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 54,143 psi | 90% | 2815 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 51,343 psi | 85% | 2782 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 53,838 psi | 89% | 2900 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 94% | 51,314 psi | 85% | 2881 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,072 psi | 63% | 2628 fps | 98.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,496 psi | 71% | 2782 fps | 97.6% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 53,142 psi | 88% | 2808 fps | 99.5% |
| Bofors RP3 | <<locked>> | 90% | 51,169 psi | 85% | 2779 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 51,445 psi | 85% | 2743 fps | 96.6% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,172 psi | 90% | 2730 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 51,488 psi | 86% | 2772 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 53,287 psi | 89% | 2867 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 90% | 52,286 psi | 87% | 2792 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 96% | 51,837 psi | 86% | 2838 fps | 97.4% |
| Hodgdon H4350 | <<locked>> | 94% | 52,460 psi | 87% | 2799 fps | 96.1% |
| Hodgdon H4895 | <<locked>> | 86% | 53,838 psi | 89% | 2805 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,763 psi | 83% | 2772 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 52,997 psi | 88% | 2835 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 52,402 psi | 87% | 2871 fps | 97% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,389 psi | 59% | 1709 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 51,590 psi | 86% | 2753 fps | 99.9% |
| IMR 3031 | <<locked>> | 86% | 53,766 psi | 89% | 2789 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 53,853 psi | 89% | 2779 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 88% | 53,998 psi | 90% | 2759 fps | 97.6% |
| IMR 4350 | <<locked>> | 98% | 51,764 psi | 86% | 2772 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 94% | 53,447 psi | 89% | 2779 fps | 97.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 52,808 psi | 88% | 2831 fps | 99.5% |
| IMR 4895 | <<locked>> | 88% | 52,663 psi | 87% | 2815 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 84% | 52,214 psi | 87% | 2743 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 52,562 psi | 87% | 2766 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 53,113 psi | 88% | 2726 fps | 99.9% |
| Lovex S062 | <<locked>> | 90% | 53,505 psi | 89% | 2772 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 52,750 psi | 88% | 2772 fps | 98.5% |
| Lovex S070 | <<locked>> | 98% | 53,345 psi | 89% | 2802 fps | 97.8% |
| Norma 201 | <<locked>> | 86% | 51,851 psi | 86% | 2740 fps | 100% |
| Norma 202 | <<locked>> | 86% | 52,330 psi | 87% | 2740 fps | 100% |
| Norma 203B | <<locked>> | 90% | 53,780 psi | 89% | 2822 fps | 99.9% |
| Norma URP | <<locked>> | 98% | 51,329 psi | 85% | 2828 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 88% | 51,024 psi | 85% | 2795 fps | 99.7% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 53,780 psi | 89% | 2877 fps | 98.5% |
| Ramshot TAC | <<locked>> | 84% | 52,359 psi | 87% | 2759 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 84% | 52,011 psi | 86% | 2779 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 82% | 53,243 psi | 88% | 2749 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,708 psi | 59% | 1749 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 52,504 psi | 87% | 2772 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 51,459 psi | 85% | 2844 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 51,068 psi | 85% | 2881 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 51,793 psi | 86% | 2861 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 51,735 psi | 86% | 2887 fps | 99% |
| Rottweil R 901 | <<locked>> | 84% | 52,866 psi | 88% | 2723 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 52,475 psi | 87% | 2740 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 54,433 psi | 90% | 2822 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 51,445 psi | 85% | 2743 fps | 96.6% |
| Shooters World Long Rifle | <<locked>> | 96% | 52,750 psi | 88% | 2772 fps | 98.5% |
| Shooters World Match Rifle | <<locked>> | 86% | 52,562 psi | 87% | 2766 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 53,505 psi | 89% | 2772 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 53,345 psi | 89% | 2802 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 52,721 psi | 88% | 2828 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 54,331 psi | 90% | 2792 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 51,619 psi | 86% | 2762 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 53,737 psi | 89% | 2687 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 53,824 psi | 89% | 2684 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 53,098 psi | 88% | 2726 fps | 97.4% |
| Somchem S321 | <<locked>> | 82% | 53,229 psi | 88% | 2776 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 52,837 psi | 88% | 2680 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 54,186 psi | 90% | 2789 fps | 99.9% |
| Somchem S355 | <<locked>> | 92% | 51,329 psi | 85% | 2766 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,095 psi | 82% | 2828 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 53,388 psi | 89% | 2648 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,041 psi | 90% | 2671 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 52,011 psi | 86% | 2703 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 52,997 psi | 88% | 2723 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 52,910 psi | 88% | 2749 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 54,041 psi | 90% | 2828 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 84% | 52,663 psi | 87% | 2746 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 51,184 psi | 85% | 2717 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 52,997 psi | 88% | 2831 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,510 psi | 69% | 2703 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 50,720 psi | 84% | 2753 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 52,620 psi | 87% | 2792 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 51,837 psi | 86% | 2838 fps | 97.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,895 psi | 56% | 2618 fps | 98% |
| Winchester StaBALL Match | <<locked>> | 86% | 51,474 psi | 86% | 2772 fps | 100% |
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% | 47,732 psi | 79% | 2605 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,943 psi | 66% | 2523 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 47,224 psi | 78% | 2677 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 48,617 psi | 81% | 2657 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 37,782 psi | 63% | 2516 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 34,055 psi | 57% | 2497 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 44,019 psi | 73% | 2638 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 80% | 37,231 psi | 62% | 2484 fps | 97% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,166 psi | 77% | 2644 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 46,282 psi | 77% | 2631 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 39,987 psi | 66% | 2664 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,840 psi | 61% | 2507 fps | 98.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,682 psi | 66% | 2569 fps | 97.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 34,519 psi | 57% | 2513 fps | 95.6% |
| Alliant Reloder-17 | 43.5 gr | 80% | 31,705 psi | 53% | 2467 fps | 96.3% |
| Alliant Reloder-23 | <<locked>> | 92% | 29,515 psi | 49% | 2405 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 96% | 36,825 psi | 61% | 2654 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,163 psi | 72% | 2638 fps | 98.1% |
| Bofors RP3 | <<locked>> | 80% | 36,245 psi | 60% | 2507 fps | 98.4% |
| Bofors RP7 | <<locked>> | 90% | 45,440 psi | 75% | 2641 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,732 psi | 79% | 2631 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,889 psi | 75% | 2667 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 49,661 psi | 83% | 2808 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 80% | 37,318 psi | 62% | 2510 fps | 95.9% |
| Hodgdon H414 | 47.9 gr | 90% | 42,308 psi | 70% | 2667 fps | 95% |
| Hodgdon H4350 | <<locked>> | 92% | 49,327 psi | 82% | 2746 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 44,425 psi | 74% | 2648 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 29,559 psi | 49% | 2356 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,306 psi | 67% | 2615 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 92% | 45,310 psi | 75% | 2743 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,281 psi | 44% | 1526 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,540 psi | 71% | 2598 fps | 99.2% |
| IMR 3031 | <<locked>> | 80% | 44,092 psi | 73% | 2644 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,059 psi | 65% | 2516 fps | 97.8% |
| IMR 4166 Enduron | <<locked>> | 82% | 44,425 psi | 74% | 2592 fps | 95.5% |
| IMR 4350 | <<locked>> | 94% | 45,759 psi | 76% | 2667 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 88% | 44,541 psi | 74% | 2625 fps | 95.4% |
| IMR 4831 | <<locked>> | 86% | 33,098 psi | 55% | 2457 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 40,654 psi | 68% | 2602 fps | 98.6% |
| IMR 8208 XBR | <<locked>> | 80% | 46,166 psi | 77% | 2644 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 42,815 psi | 71% | 2612 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,976 psi | 73% | 2572 fps | 99.1% |
| Lovex S062 | <<locked>> | 80% | 38,856 psi | 65% | 2520 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 38,537 psi | 64% | 2513 fps | 95.3% |
| Lovex S070 | <<locked>> | 92% | 44,309 psi | 74% | 2648 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 42,975 psi | 71% | 2589 fps | 99.6% |
| Norma 202 | <<locked>> | 80% | 43,323 psi | 72% | 2598 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,059 psi | 65% | 2559 fps | 98.2% |
| Norma URP | <<locked>> | 86% | 34,548 psi | 57% | 2500 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 38,638 psi | 64% | 2572 fps | 98% |
| Ramshot Hunter | <<locked>> | 92% | 41,162 psi | 68% | 2651 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 45,948 psi | 76% | 2648 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,440 psi | 75% | 2667 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,835 psi | 83% | 2694 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,397 psi | 44% | 1562 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 40,335 psi | 67% | 2549 fps | 95% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,669 psi | 69% | 2671 fps | 98.3% |
| ReloadSwiss RS 60 | 43.5 gr | 80% | 33,837 psi | 56% | 2536 fps | 99.2% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 36,405 psi | 60% | 2572 fps | 95.9% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 36,695 psi | 61% | 2582 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 46,702 psi | 78% | 2628 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,814 psi | 68% | 2539 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 80% | 34,055 psi | 57% | 2451 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 90% | 45,440 psi | 75% | 2641 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 86% | 38,537 psi | 64% | 2513 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,815 psi | 71% | 2612 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,856 psi | 65% | 2520 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 92% | 44,309 psi | 74% | 2648 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,215 psi | 59% | 2500 fps | 97% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,179 psi | 73% | 2625 fps | 97.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,424 psi | 70% | 2602 fps | 98.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,353 psi | 74% | 2543 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,811 psi | 61% | 2411 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 43,250 psi | 72% | 2562 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 49,719 psi | 83% | 2723 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,019 psi | 73% | 2546 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,918 psi | 73% | 2621 fps | 99% |
| Somchem S355 | <<locked>> | 80% | 35,099 psi | 58% | 2461 fps | 97.6% |
| Somchem S365 | <<locked>> | 82% | 26,992 psi | 45% | 2336 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 50,169 psi | 83% | 2602 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,744 psi | 74% | 2536 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,248 psi | 67% | 2523 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,944 psi | 68% | 2533 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,272 psi | 55% | 2398 fps | 98.3% |
| Vihtavuori N160 | <<locked>> | 84% | 33,736 psi | 56% | 2448 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 46,079 psi | 77% | 2641 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 39,508 psi | 66% | 2523 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 35,433 psi | 59% | 2500 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 92% | 31,821 psi | 53% | 2487 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,515 psi | 49% | 2320 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 45,803 psi | 76% | 2687 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 42,308 psi | 70% | 2667 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 96% | 29,762 psi | 49% | 2487 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,858 psi | 70% | 2608 fps | 99.1% |
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 94 powders for 7 x 64 Brenneke loaded with the .284 | 145gr | Fox Classic Hunter. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,910 fps; across all powders the maximum-charge window runs from 1,709 fps to 2,910 fps. Alliant Reloder-16 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 56–90 %, leaving at least 10 % headroom. The 145.0 gr projectile in 0.284" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-16, Alliant Reloder-23, Alliant Reloder-26 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 Reloder-17, ReloadSwiss RS 60, Hodgdon H414 rank at the top here: for 7 x 64 Brenneke with the .284 | 145gr | Fox Classic Hunter 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.