Load Specifications
Load data in caliber .30-06 Spring. with .308 | 180gr | Sierra GameKing 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, Hodgdon Superformance and Alliant Reloder-17.
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>> | 82% | 50,241 psi | 86% | 2510 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 51,488 psi | 88% | 2572 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 50,038 psi | 85% | 2589 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 51,039 psi | 87% | 2562 fps | 96.1% |
| Accurate 4064 | <<locked>> | 90% | 51,532 psi | 88% | 2615 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 50,908 psi | 87% | 2684 fps | 99.2% |
| ADI AR 2206H | <<locked>> | 86% | 52,417 psi | 89% | 2644 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 90% | 50,328 psi | 86% | 2598 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 84% | 51,561 psi | 88% | 2598 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 52,127 psi | 89% | 2582 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 51,576 psi | 88% | 2746 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 53,113 psi | 90% | 2661 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 50,444 psi | 86% | 2635 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,678 psi | 90% | 2740 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 94% | 50,009 psi | 85% | 2720 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,463 psi | 64% | 2490 fps | 98.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,553 psi | 71% | 2631 fps | 97.3% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 51,837 psi | 88% | 2651 fps | 99.4% |
| Bofors RP3 | <<locked>> | 90% | 50,256 psi | 86% | 2628 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 50,734 psi | 86% | 2595 fps | 96.3% |
| Hodgdon Benchmark | <<locked>> | 82% | 50,299 psi | 86% | 2543 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 50,415 psi | 86% | 2621 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 52,243 psi | 89% | 2713 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 90% | 51,213 psi | 87% | 2638 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 96% | 50,560 psi | 86% | 2680 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 94% | 51,430 psi | 88% | 2644 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 86% | 52,910 psi | 90% | 2654 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,747 psi | 83% | 2621 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 51,953 psi | 88% | 2684 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 51,053 psi | 87% | 2707 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,331 psi | 60% | 1617 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 50,691 psi | 86% | 2605 fps | 99.9% |
| IMR 3031 | <<locked>> | 86% | 52,750 psi | 90% | 2638 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 52,982 psi | 90% | 2628 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 88% | 52,997 psi | 90% | 2605 fps | 97.3% |
| IMR 4350 | <<locked>> | 98% | 50,749 psi | 86% | 2618 fps | 96.4% |
| IMR 4451 Enduron | <<locked>> | 94% | 52,489 psi | 89% | 2628 fps | 97.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 51,430 psi | 88% | 2674 fps | 99.3% |
| IMR 4895 | <<locked>> | 88% | 51,721 psi | 88% | 2664 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 84% | 51,561 psi | 88% | 2598 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 51,938 psi | 88% | 2621 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 52,214 psi | 89% | 2579 fps | 99.8% |
| Lovex S062 | <<locked>> | 90% | 52,765 psi | 90% | 2625 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 51,779 psi | 88% | 2621 fps | 98.3% |
| Lovex S070 | <<locked>> | 98% | 52,504 psi | 89% | 2651 fps | 97.5% |
| Norma 201 | <<locked>> | 86% | 51,372 psi | 87% | 2595 fps | 100% |
| Norma 202 | <<locked>> | 86% | 51,634 psi | 88% | 2595 fps | 100% |
| Norma 203B | <<locked>> | 90% | 52,881 psi | 90% | 2671 fps | 99.9% |
| Norma URP | <<locked>> | 98% | 50,241 psi | 86% | 2674 fps | 99.1% |
| Ramshot Big Game | <<locked>> | 88% | 49,806 psi | 85% | 2641 fps | 99.6% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,431 psi | 89% | 2717 fps | 98.2% |
| Ramshot TAC | <<locked>> | 84% | 51,822 psi | 88% | 2615 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 84% | 51,140 psi | 87% | 2631 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 82% | 52,156 psi | 89% | 2595 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,868 psi | 61% | 1657 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 51,793 psi | 88% | 2621 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 50,560 psi | 86% | 2694 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 50,082 psi | 85% | 2726 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 50,386 psi | 86% | 2703 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 50,647 psi | 86% | 2726 fps | 98.8% |
| Rottweil R 901 | <<locked>> | 84% | 52,228 psi | 89% | 2579 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 51,866 psi | 88% | 2595 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 50,111 psi | 85% | 2621 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 94% | 50,734 psi | 86% | 2595 fps | 96.3% |
| Shooters World Long Rifle | <<locked>> | 96% | 51,779 psi | 88% | 2621 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 86% | 51,938 psi | 88% | 2621 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 52,765 psi | 90% | 2625 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 52,504 psi | 89% | 2651 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 51,663 psi | 88% | 2677 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 49,922 psi | 85% | 2589 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 50,923 psi | 87% | 2618 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 52,895 psi | 90% | 2539 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 52,982 psi | 90% | 2539 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 52,083 psi | 89% | 2575 fps | 97.2% |
| Somchem S321 | <<locked>> | 82% | 52,330 psi | 89% | 2625 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 52,373 psi | 89% | 2539 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 52,837 psi | 90% | 2631 fps | 99.8% |
| Somchem S355 | <<locked>> | 92% | 50,560 psi | 86% | 2618 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,950 psi | 82% | 2677 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 52,779 psi | 90% | 2507 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 53,084 psi | 90% | 2526 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 51,111 psi | 87% | 2559 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 52,214 psi | 89% | 2579 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 51,909 psi | 88% | 2602 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 52,736 psi | 90% | 2671 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 84% | 51,866 psi | 88% | 2598 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 50,386 psi | 86% | 2575 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 51,822 psi | 88% | 2677 fps | 99.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,509 psi | 69% | 2559 fps | 98.2% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 49,864 psi | 85% | 2608 fps | 99.9% |
| Winchester 748 | <<locked>> | 84% | 51,590 psi | 88% | 2641 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 50,560 psi | 86% | 2680 fps | 97.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,402 psi | 57% | 2477 fps | 97.7% |
| Winchester StaBALL Match | <<locked>> | 86% | 50,473 psi | 86% | 2621 fps | 99.9% |
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% | 47,152 psi | 80% | 2467 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,871 psi | 68% | 2398 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,717 psi | 80% | 2536 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 47,964 psi | 82% | 2513 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 37,695 psi | 64% | 2392 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 33,591 psi | 57% | 2369 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 43,279 psi | 74% | 2493 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 80% | 36,840 psi | 63% | 2352 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,310 psi | 77% | 2500 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 45,542 psi | 78% | 2493 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 39,421 psi | 67% | 2520 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,390 psi | 62% | 2375 fps | 98.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,059 psi | 66% | 2431 fps | 97.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 34,098 psi | 58% | 2379 fps | 95.3% |
| Alliant Reloder-17 | 46.8 gr | 80% | 31,343 psi | 53% | 2339 fps | 96.1% |
| Alliant Reloder-23 | <<locked>> | 94% | 31,169 psi | 53% | 2336 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 36,201 psi | 62% | 2510 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,395 psi | 72% | 2497 fps | 97.9% |
| Bofors RP3 | <<locked>> | 80% | 35,911 psi | 61% | 2379 fps | 98.3% |
| Bofors RP7 | <<locked>> | 92% | 47,703 psi | 81% | 2546 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,340 psi | 81% | 2497 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,237 psi | 75% | 2526 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,704 psi | 83% | 2657 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 80% | 36,840 psi | 63% | 2379 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 92% | 44,251 psi | 75% | 2575 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 92% | 48,341 psi | 82% | 2595 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 43,642 psi | 74% | 2503 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 29,472 psi | 50% | 2238 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,581 psi | 67% | 2477 fps | 99.1% |
| Hodgdon Superformance | 58.2 gr | 94% | 47,645 psi | 81% | 2651 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,194 psi | 45% | 1440 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,989 psi | 71% | 2461 fps | 99.1% |
| IMR 3031 | <<locked>> | 80% | 43,207 psi | 74% | 2500 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,667 psi | 66% | 2385 fps | 97.6% |
| IMR 4166 Enduron | <<locked>> | 82% | 43,918 psi | 75% | 2454 fps | 95.2% |
| IMR 4350 | <<locked>> | 96% | 47,674 psi | 81% | 2569 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 43,729 psi | 74% | 2480 fps | 95.1% |
| IMR 4831 | <<locked>> | 86% | 32,706 psi | 56% | 2329 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 39,987 psi | 68% | 2461 fps | 98.4% |
| IMR 8208 XBR | <<locked>> | 80% | 45,310 psi | 77% | 2500 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 42,380 psi | 72% | 2477 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,482 psi | 74% | 2438 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 38,551 psi | 66% | 2388 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 38,305 psi | 65% | 2385 fps | 95.2% |
| Lovex S070 | <<locked>> | 92% | 43,613 psi | 74% | 2507 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 42,583 psi | 72% | 2454 fps | 99.6% |
| Norma 202 | <<locked>> | 80% | 42,714 psi | 73% | 2461 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,421 psi | 65% | 2421 fps | 98.1% |
| Norma URP | <<locked>> | 86% | 34,127 psi | 58% | 2372 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 38,043 psi | 65% | 2434 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 92% | 40,495 psi | 69% | 2510 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 45,208 psi | 77% | 2507 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,715 psi | 76% | 2526 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,168 psi | 84% | 2549 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,542 psi | 45% | 1476 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 42,627 psi | 73% | 2467 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,901 psi | 70% | 2530 fps | 98.1% |
| ReloadSwiss RS 60 | 46.8 gr | 80% | 33,373 psi | 57% | 2402 fps | 99.1% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 35,882 psi | 61% | 2438 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 38,638 psi | 66% | 2500 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 46,456 psi | 79% | 2490 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,393 psi | 69% | 2405 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 33,910 psi | 58% | 2326 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 92% | 47,703 psi | 81% | 2546 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 38,305 psi | 65% | 2385 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,380 psi | 72% | 2477 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,551 psi | 66% | 2388 fps | 99% |
| Shooters World SW4350 | <<locked>> | 92% | 43,613 psi | 74% | 2507 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,780 psi | 59% | 2372 fps | 96.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,569 psi | 74% | 2484 fps | 97.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,887 psi | 71% | 2467 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,888 psi | 75% | 2408 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,434 psi | 62% | 2287 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 42,641 psi | 73% | 2425 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 48,936 psi | 83% | 2575 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 43,584 psi | 74% | 2411 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,178 psi | 74% | 2480 fps | 98.9% |
| Somchem S355 | <<locked>> | 80% | 34,824 psi | 59% | 2333 fps | 97.5% |
| Somchem S365 | <<locked>> | 82% | 26,832 psi | 46% | 2221 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 49,574 psi | 84% | 2464 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,193 psi | 75% | 2402 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,769 psi | 68% | 2392 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,582 psi | 69% | 2402 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,098 psi | 56% | 2277 fps | 98.3% |
| Vihtavuori N160 | <<locked>> | 86% | 35,694 psi | 61% | 2375 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 45,411 psi | 77% | 2500 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 38,943 psi | 66% | 2392 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 34,998 psi | 60% | 2372 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 92% | 31,270 psi | 53% | 2356 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,298 psi | 50% | 2198 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 44,904 psi | 76% | 2539 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 44,251 psi | 75% | 2575 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 96% | 29,414 psi | 50% | 2352 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,321 psi | 70% | 2470 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 .30-06 Spring. loaded with the .308 | 180gr | Sierra GameKing. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,746 fps; across all powders the maximum-charge window runs from 1,617 fps to 2,746 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 (405 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:12.5 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .30-06 Spring. with the .308 | 180gr | Sierra GameKing 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.