Load Specifications
Load data in caliber 7 x 64 Brenneke with .284 | 145gr | Hasler ARIETE 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 Power Pro 2000-MR, Hodgdon Superformance and ReloadSwiss RS 60.
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% | 53,272 psi | 89% | 2680 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 51,111 psi | 85% | 2697 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 53,505 psi | 89% | 2766 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 51,082 psi | 85% | 2690 fps | 96.1% |
| Accurate 4064 | <<locked>> | 90% | 51,227 psi | 85% | 2743 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 50,995 psi | 85% | 2815 fps | 99.2% |
| ADI AR 2206H | <<locked>> | 86% | 52,533 psi | 87% | 2776 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 92% | 53,679 psi | 89% | 2779 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 84% | 51,735 psi | 86% | 2733 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 52,214 psi | 87% | 2710 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 51,822 psi | 86% | 2884 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 53,388 psi | 89% | 2799 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 53,824 psi | 89% | 2818 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,866 psi | 88% | 2877 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 96% | 54,114 psi | 90% | 2917 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,333 psi | 62% | 2608 fps | 98.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,481 psi | 69% | 2756 fps | 97.2% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 52,112 psi | 87% | 2789 fps | 99.4% |
| Bofors RP3 | <<locked>> | 92% | 53,476 psi | 89% | 2808 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 54,157 psi | 90% | 2779 fps | 97% |
| Hodgdon Benchmark | <<locked>> | 84% | 53,388 psi | 89% | 2717 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 54,012 psi | 90% | 2805 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 52,431 psi | 87% | 2848 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 90% | 51,227 psi | 85% | 2769 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 98% | 54,259 psi | 90% | 2871 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 94% | 51,822 psi | 86% | 2782 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 86% | 53,026 psi | 88% | 2789 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,110 psi | 82% | 2756 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 52,214 psi | 87% | 2818 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 51,314 psi | 85% | 2844 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,244 psi | 59% | 1703 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 54,462 psi | 90% | 2792 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 52,808 psi | 88% | 2769 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 53,098 psi | 88% | 2759 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 88% | 53,011 psi | 88% | 2736 fps | 97.3% |
| IMR 4350ᴾ | <<locked>> | 100% | 54,143 psi | 90% | 2802 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 94% | 52,837 psi | 88% | 2762 fps | 97.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 51,822 psi | 86% | 2812 fps | 99.4% |
| IMR 4895 | <<locked>> | 88% | 51,822 psi | 86% | 2795 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 84% | 51,735 psi | 86% | 2733 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 51,750 psi | 86% | 2749 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 52,359 psi | 87% | 2710 fps | 99.8% |
| Lovex S062 | <<locked>> | 90% | 52,736 psi | 88% | 2756 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 51,764 psi | 86% | 2753 fps | 98.3% |
| Lovex S070 | <<locked>> | 98% | 52,750 psi | 88% | 2785 fps | 97.6% |
| Norma 201 | <<locked>> | 88% | 54,346 psi | 90% | 2769 fps | 100% |
| Norma 202 | <<locked>> | 86% | 51,837 psi | 86% | 2730 fps | 100% |
| Norma 203B | <<locked>> | 90% | 52,997 psi | 88% | 2805 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 54,056 psi | 90% | 2864 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 90% | 53,606 psi | 89% | 2828 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,895 psi | 88% | 2858 fps | 98.2% |
| Ramshot TAC | <<locked>> | 84% | 51,721 psi | 86% | 2743 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 84% | 51,314 psi | 85% | 2762 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 82% | 52,547 psi | 87% | 2733 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,549 psi | 59% | 1739 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 51,909 psi | 86% | 2756 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 54,433 psi | 90% | 2884 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 53,780 psi | 89% | 2917 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 50,792 psi | 84% | 2838 fps | 99% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 54,375 psi | 90% | 2923 fps | 99.3% |
| Rottweil R 901 | <<locked>> | 84% | 51,953 psi | 86% | 2703 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 51,648 psi | 86% | 2720 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 53,345 psi | 89% | 2799 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 54,157 psi | 90% | 2779 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 96% | 51,764 psi | 86% | 2753 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 86% | 51,750 psi | 86% | 2749 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 52,736 psi | 88% | 2756 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 52,750 psi | 88% | 2785 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 52,025 psi | 86% | 2815 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 53,606 psi | 89% | 2776 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 54,433 psi | 90% | 2802 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 52,939 psi | 88% | 2667 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 53,055 psi | 88% | 2667 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 52,185 psi | 87% | 2707 fps | 97.1% |
| Somchem S321 | <<locked>> | 82% | 52,431 psi | 87% | 2759 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 52,083 psi | 87% | 2664 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 53,156 psi | 88% | 2766 fps | 99.8% |
| Somchem S355 | <<locked>> | 94% | 53,911 psi | 90% | 2799 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 48,109 psi | 80% | 2808 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 52,823 psi | 88% | 2635 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 53,185 psi | 88% | 2654 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 51,416 psi | 85% | 2694 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 52,214 psi | 87% | 2707 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 51,880 psi | 86% | 2730 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 53,098 psi | 88% | 2808 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 84% | 51,866 psi | 86% | 2726 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 53,708 psi | 89% | 2749 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 52,083 psi | 87% | 2812 fps | 99.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,553 psi | 67% | 2680 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 53,519 psi | 89% | 2789 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 51,822 psi | 86% | 2776 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 50,879 psi | 85% | 2815 fps | 97.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,315 psi | 55% | 2592 fps | 97.6% |
| Winchester StaBALL Match | <<locked>> | 88% | 54,041 psi | 90% | 2805 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% | 46,789 psi | 78% | 2585 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,030 psi | 65% | 2507 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,354 psi | 77% | 2657 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 47,979 psi | 80% | 2641 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 36,956 psi | 61% | 2497 fps | 99.9% |
| Accurate 4350 | <<locked>> | 86% | 33,330 psi | 55% | 2477 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 43,221 psi | 72% | 2618 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 80% | 36,753 psi | 61% | 2467 fps | 96.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,353 psi | 75% | 2628 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 45,571 psi | 76% | 2615 fps | 100% |
| Alliant Power Pro 2000-MR | 43.5 gr | 80% | 39,305 psi | 65% | 2641 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,085 psi | 60% | 2487 fps | 98.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,928 psi | 65% | 2549 fps | 97.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 33,939 psi | 56% | 2490 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 31,140 psi | 52% | 2448 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,922 psi | 51% | 2441 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 36,187 psi | 60% | 2631 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,453 psi | 71% | 2618 fps | 97.9% |
| Bofors RP3 | <<locked>> | 80% | 35,723 psi | 59% | 2490 fps | 98.2% |
| Bofors RP7 | <<locked>> | 92% | 47,747 psi | 79% | 2674 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,195 psi | 78% | 2618 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,106 psi | 73% | 2648 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,834 psi | 81% | 2792 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 80% | 36,622 psi | 61% | 2490 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 92% | 44,469 psi | 74% | 2703 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 92% | 48,356 psi | 80% | 2723 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 43,598 psi | 72% | 2628 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 29,182 psi | 48% | 2339 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,552 psi | 66% | 2595 fps | 99% |
| Hodgdon Superformance | 53.2 gr | 94% | 47,834 psi | 79% | 2785 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,266 psi | 44% | 1522 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,032 psi | 70% | 2585 fps | 99% |
| IMR 3031 | <<locked>> | 80% | 43,120 psi | 72% | 2621 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,537 psi | 64% | 2500 fps | 97.6% |
| IMR 4166 Enduron | <<locked>> | 82% | 43,758 psi | 73% | 2575 fps | 95.2% |
| IMR 4350 | <<locked>> | 96% | 47,776 psi | 79% | 2697 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 43,918 psi | 73% | 2605 fps | 95.1% |
| IMR 4831 | <<locked>> | 88% | 34,679 psi | 58% | 2490 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 39,871 psi | 66% | 2579 fps | 98.3% |
| IMR 8208 XBR | <<locked>> | 80% | 45,353 psi | 75% | 2628 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 42,250 psi | 70% | 2598 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,468 psi | 72% | 2559 fps | 98.9% |
| Lovex S062 | <<locked>> | 80% | 38,319 psi | 64% | 2503 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 37,884 psi | 63% | 2493 fps | 95% |
| Lovex S070 | <<locked>> | 92% | 43,424 psi | 72% | 2625 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 42,148 psi | 70% | 2569 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 42,482 psi | 71% | 2579 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,305 psi | 64% | 2539 fps | 98% |
| Norma URP | <<locked>> | 86% | 33,910 psi | 56% | 2480 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 37,942 psi | 63% | 2552 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 92% | 40,611 psi | 67% | 2635 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 45,281 psi | 75% | 2631 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,701 psi | 74% | 2651 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,139 psi | 82% | 2677 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,368 psi | 44% | 1555 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 42,511 psi | 71% | 2589 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,785 psi | 68% | 2648 fps | 98% |
| ReloadSwiss RS 60 | 42.8 gr | 80% | 33,228 psi | 55% | 2516 fps | 99% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 35,549 psi | 59% | 2549 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 38,566 psi | 64% | 2618 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 46,093 psi | 77% | 2612 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,263 psi | 67% | 2526 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 80% | 33,518 psi | 56% | 2431 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 92% | 47,747 psi | 79% | 2674 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 37,884 psi | 63% | 2493 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,250 psi | 70% | 2598 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,319 psi | 64% | 2503 fps | 99% |
| Shooters World SW4350 | <<locked>> | 92% | 43,424 psi | 72% | 2625 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,548 psi | 57% | 2480 fps | 96.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,453 psi | 72% | 2605 fps | 97.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,698 psi | 69% | 2585 fps | 98.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,801 psi | 73% | 2530 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,318 psi | 60% | 2398 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 45,498 psi | 76% | 2598 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 48,994 psi | 81% | 2707 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 43,221 psi | 72% | 2526 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,207 psi | 72% | 2602 fps | 98.8% |
| Somchem S355 | <<locked>> | 80% | 34,403 psi | 57% | 2441 fps | 97.3% |
| Somchem S365 | <<locked>> | 82% | 26,440 psi | 44% | 2316 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 49,588 psi | 82% | 2589 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,164 psi | 73% | 2523 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,639 psi | 66% | 2510 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,408 psi | 67% | 2520 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,808 psi | 55% | 2382 fps | 98.1% |
| Vihtavuori N160 | <<locked>> | 86% | 35,563 psi | 59% | 2487 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 45,556 psi | 76% | 2625 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 38,798 psi | 64% | 2507 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 34,809 psi | 58% | 2484 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 94% | 33,156 psi | 55% | 2516 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,051 psi | 48% | 2300 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 44,991 psi | 75% | 2667 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 44,469 psi | 74% | 2703 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 96% | 29,211 psi | 49% | 2461 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,118 psi | 68% | 2589 fps | 99% |
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 | Hasler ARIETE. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,923 fps; across all powders the maximum-charge window runs from 1,703 fps to 2,923 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 55–90 %, leaving at least 10 % headroom. The 145.0 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. Alliant Power Pro 2000-MR, Hodgdon Superformance, ReloadSwiss RS 60 rank at the top here: for 7 x 64 Brenneke with the .284 | 145gr | Hasler ARIETE 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.