Load Specifications
Load data in caliber 7 x 64 Brenneke with .284 | 150gr | Osprey Virtus 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 60, Alliant Reloder-17 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.
A valid access license is required to use the Personalized Load Calculator.
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% | 54,230 psi | 90% | 2644 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 52,649 psi | 87% | 2667 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 50,923 psi | 85% | 2684 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 52,402 psi | 87% | 2671 fps | 96.8% |
| Accurate 4064 | <<locked>> | 90% | 52,837 psi | 88% | 2717 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 52,460 psi | 87% | 2792 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 86% | 53,577 psi | 89% | 2749 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 51,430 psi | 85% | 2700 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 84% | 52,692 psi | 88% | 2700 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 53,403 psi | 89% | 2674 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 53,026 psi | 88% | 2858 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 51,227 psi | 85% | 2720 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 51,634 psi | 86% | 2736 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,157 psi | 90% | 2854 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 94% | 51,663 psi | 86% | 2835 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,348 psi | 64% | 2592 fps | 98.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,743 psi | 71% | 2743 fps | 98% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 53,287 psi | 89% | 2762 fps | 99.7% |
| Bofors RP3 | <<locked>> | 90% | 51,271 psi | 85% | 2730 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 51,909 psi | 86% | 2703 fps | 96.9% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,273 psi | 90% | 2680 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 51,866 psi | 86% | 2726 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 53,708 psi | 89% | 2822 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 90% | 52,388 psi | 87% | 2743 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 96% | 52,243 psi | 87% | 2795 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 94% | 53,026 psi | 88% | 2759 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 86% | 54,099 psi | 90% | 2756 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 50,401 psi | 84% | 2733 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 53,461 psi | 89% | 2789 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 52,663 psi | 87% | 2828 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,273 psi | 59% | 1673 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 52,185 psi | 87% | 2713 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 53,954 psi | 90% | 2736 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,172 psi | 90% | 2733 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 88% | 54,302 psi | 90% | 2713 fps | 97.9% |
| IMR 4350 | <<locked>> | 98% | 52,025 psi | 86% | 2726 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 94% | 53,867 psi | 89% | 2736 fps | 97.7% |
| IMR 4831ᴾ | <<locked>> | 100% | 53,214 psi | 88% | 2789 fps | 99.6% |
| IMR 4895 | <<locked>> | 88% | 52,968 psi | 88% | 2766 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 52,692 psi | 88% | 2700 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 52,968 psi | 88% | 2720 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 53,258 psi | 88% | 2677 fps | 99.9% |
| Lovex S062 | <<locked>> | 90% | 53,809 psi | 89% | 2726 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 52,939 psi | 88% | 2726 fps | 98.7% |
| Lovex S070 | <<locked>> | 98% | 53,969 psi | 90% | 2762 fps | 98.1% |
| Norma 201 | <<locked>> | 86% | 52,359 psi | 87% | 2694 fps | 100% |
| Norma 202 | <<locked>> | 86% | 52,866 psi | 88% | 2697 fps | 100% |
| Norma 203B | <<locked>> | 90% | 54,186 psi | 90% | 2776 fps | 100% |
| Norma URP | <<locked>> | 98% | 51,982 psi | 86% | 2785 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 88% | 51,184 psi | 85% | 2749 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,273 psi | 90% | 2835 fps | 98.7% |
| Ramshot TAC | <<locked>> | 84% | 52,736 psi | 88% | 2717 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 84% | 52,373 psi | 87% | 2733 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 82% | 53,490 psi | 89% | 2703 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,897 psi | 60% | 1716 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 53,011 psi | 88% | 2730 fps | 98.2% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 51,909 psi | 86% | 2799 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 51,677 psi | 86% | 2838 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 52,315 psi | 87% | 2818 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 52,286 psi | 87% | 2844 fps | 99.2% |
| Rottweil R 901 | <<locked>> | 84% | 53,229 psi | 88% | 2677 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 52,634 psi | 87% | 2690 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 51,517 psi | 86% | 2726 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 51,909 psi | 86% | 2703 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 96% | 52,939 psi | 88% | 2726 fps | 98.7% |
| Shooters World Match Rifle | <<locked>> | 86% | 52,968 psi | 88% | 2720 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 53,809 psi | 89% | 2726 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 53,969 psi | 90% | 2762 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 53,330 psi | 89% | 2785 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 51,082 psi | 85% | 2694 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 51,938 psi | 86% | 2720 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 53,824 psi | 89% | 2635 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,070 psi | 90% | 2635 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 53,374 psi | 89% | 2684 fps | 97.7% |
| Somchem S321 | <<locked>> | 82% | 53,838 psi | 89% | 2733 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 53,359 psi | 89% | 2638 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 54,331 psi | 90% | 2740 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 51,706 psi | 86% | 2723 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,879 psi | 83% | 2789 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 53,650 psi | 89% | 2598 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,157 psi | 90% | 2621 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 52,547 psi | 87% | 2661 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 53,301 psi | 89% | 2674 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 53,417 psi | 89% | 2707 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 54,433 psi | 90% | 2782 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 84% | 53,214 psi | 88% | 2700 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 51,547 psi | 86% | 2674 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 53,403 psi | 89% | 2785 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,872 psi | 70% | 2664 fps | 98.6% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 51,184 psi | 85% | 2713 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 52,997 psi | 88% | 2746 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 52,243 psi | 87% | 2795 fps | 97.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,258 psi | 57% | 2589 fps | 98.5% |
| Winchester StaBALL Match | <<locked>> | 86% | 51,837 psi | 86% | 2726 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% | 47,950 psi | 80% | 2559 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,248 psi | 67% | 2480 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 47,718 psi | 79% | 2635 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 45,963 psi | 76% | 2566 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 38,101 psi | 63% | 2477 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 34,287 psi | 57% | 2457 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 44,353 psi | 74% | 2595 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 80% | 37,681 psi | 63% | 2448 fps | 97.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,499 psi | 77% | 2602 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 46,601 psi | 77% | 2582 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,205 psi | 67% | 2621 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,115 psi | 62% | 2467 fps | 98.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,016 psi | 66% | 2530 fps | 98.2% |
| Alliant Reloder-16 | <<locked>> | 84% | 32,750 psi | 54% | 2425 fps | 95.1% |
| Alliant Reloder-17 | 42.7 gr | 80% | 32,068 psi | 53% | 2434 fps | 96.8% |
| Alliant Reloder-23 | <<locked>> | 92% | 29,762 psi | 49% | 2375 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 94% | 34,664 psi | 58% | 2556 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,656 psi | 73% | 2598 fps | 98.4% |
| Bofors RP3 | <<locked>> | 80% | 36,579 psi | 61% | 2467 fps | 98.7% |
| Bofors RP7 | <<locked>> | 90% | 45,701 psi | 76% | 2598 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,008 psi | 80% | 2589 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,078 psi | 75% | 2621 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,009 psi | 83% | 2766 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 80% | 37,405 psi | 62% | 2470 fps | 96.3% |
| Hodgdon H414 | 46.9 gr | 90% | 42,467 psi | 71% | 2621 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 92% | 49,763 psi | 83% | 2707 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 80% | 44,744 psi | 74% | 2605 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 29,834 psi | 50% | 2323 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,756 psi | 68% | 2575 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 92% | 45,411 psi | 75% | 2700 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,252 psi | 44% | 1493 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,844 psi | 71% | 2556 fps | 99.3% |
| IMR 3031 | <<locked>> | 80% | 44,425 psi | 74% | 2595 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,566 psi | 66% | 2480 fps | 98.1% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,105 psi | 70% | 2503 fps | 95.1% |
| IMR 4350 | <<locked>> | 94% | 45,934 psi | 76% | 2625 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 42,090 psi | 70% | 2530 fps | 95% |
| IMR 4831 | <<locked>> | 86% | 33,315 psi | 55% | 2418 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 40,988 psi | 68% | 2559 fps | 98.8% |
| IMR 8208 XBR | <<locked>> | 80% | 46,499 psi | 77% | 2602 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 43,250 psi | 72% | 2572 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,454 psi | 74% | 2536 fps | 99.3% |
| Lovex S062 | <<locked>> | 80% | 39,349 psi | 65% | 2484 fps | 99.3% |
| Lovex S065 | <<locked>> | 84% | 36,564 psi | 61% | 2428 fps | 95% |
| Lovex S070 | <<locked>> | 90% | 41,684 psi | 69% | 2552 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 43,236 psi | 72% | 2546 fps | 99.7% |
| Norma 202 | <<locked>> | 80% | 43,627 psi | 72% | 2552 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,378 psi | 65% | 2520 fps | 98.5% |
| Norma URP | <<locked>> | 86% | 34,751 psi | 58% | 2461 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 38,841 psi | 65% | 2530 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 90% | 38,827 psi | 65% | 2556 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 46,166 psi | 77% | 2605 fps | 97.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,672 psi | 76% | 2625 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,067 psi | 83% | 2648 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,629 psi | 44% | 1532 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 40,770 psi | 68% | 2513 fps | 95.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,119 psi | 70% | 2631 fps | 98.6% |
| ReloadSwiss RS 60 | 42.7 gr | 80% | 34,200 psi | 57% | 2500 fps | 99.5% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 34,243 psi | 57% | 2477 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 36,840 psi | 61% | 2539 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 46,934 psi | 78% | 2582 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,031 psi | 68% | 2497 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 80% | 34,330 psi | 57% | 2411 fps | 97.9% |
| Rottweil R 907 | <<locked>> | 90% | 45,701 psi | 76% | 2598 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 84% | 36,564 psi | 61% | 2428 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,250 psi | 72% | 2572 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,349 psi | 65% | 2484 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 90% | 41,684 psi | 69% | 2552 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,578 psi | 59% | 2467 fps | 97.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,367 psi | 74% | 2579 fps | 97.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,815 psi | 71% | 2566 fps | 99% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,831 psi | 74% | 2503 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,246 psi | 62% | 2375 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 43,613 psi | 72% | 2523 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 50,314 psi | 84% | 2680 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,266 psi | 74% | 2500 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,425 psi | 74% | 2582 fps | 99.2% |
| Somchem S355 | <<locked>> | 80% | 35,389 psi | 59% | 2421 fps | 97.9% |
| Somchem S365 | <<locked>> | 80% | 25,367 psi | 42% | 2247 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 50,691 psi | 84% | 2559 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,223 psi | 75% | 2497 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,756 psi | 68% | 2484 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,249 psi | 69% | 2490 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,547 psi | 56% | 2359 fps | 98.6% |
| Vihtavuori N160 | <<locked>> | 84% | 34,142 psi | 57% | 2415 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 46,456 psi | 77% | 2598 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 39,581 psi | 66% | 2477 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 33,431 psi | 56% | 2411 fps | 95% |
| Vihtavuori N555 | <<locked>> | 92% | 31,937 psi | 53% | 2448 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,849 psi | 50% | 2290 fps | 96% |
| Winchester 748 | <<locked>> | 80% | 46,282 psi | 77% | 2644 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 42,757 psi | 71% | 2628 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 96% | 29,979 psi | 50% | 2457 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,293 psi | 70% | 2569 fps | 99.3% |
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 94 powders for 7 x 64 Brenneke loaded with the .284 | 150gr | Osprey Virtus. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,858 fps; across all powders the maximum-charge window runs from 1,673 fps to 2,858 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 57–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.284" calls for a 1:9.0 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. ReloadSwiss RS 60, Alliant Reloder-17, Hodgdon H414 rank at the top here: for 7 x 64 Brenneke with the .284 | 150gr | Osprey Virtus 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.