Load Specifications
Load data in caliber 7.62 x 53 R Fin. with .308 | 170gr | Prvi Partizan FSP bullet and 93 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 Alliant Power Pro 2000-MR.
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: 27"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 49,501 psi | 88% | 2654 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 50,981 psi | 90% | 2723 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 50,502 psi | 89% | 2720 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 49,255 psi | 87% | 2736 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 50,459 psi | 89% | 2762 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 49,226 psi | 87% | 2825 fps | 98.9% |
| ADI AR 2206H | <<locked>> | 86% | 48,747 psi | 86% | 2746 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 92% | 49,647 psi | 88% | 2743 fps | 99.2% |
| ADI Benchmark 8208 | <<locked>> | 86% | 51,184 psi | 90% | 2749 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 50,908 psi | 90% | 2726 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 50,879 psi | 90% | 2900 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 48,907 psi | 86% | 2762 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 90% | 49,777 psi | 88% | 2782 fps | 99.4% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 48,254 psi | 85% | 2828 fps | 99% |
| Alliant Reloder-17 | <<locked>> | 96% | 49,153 psi | 87% | 2874 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 34,316 psi | 61% | 2566 fps | 97% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 51,126 psi | 90% | 2802 fps | 99.2% |
| Bofors RP3 | <<locked>> | 92% | 48,979 psi | 87% | 2776 fps | 99.9% |
| Bofors RP7 | <<locked>> | 96% | 49,995 psi | 88% | 2736 fps | 95.8% |
| Hodgdon Benchmark | <<locked>> | 84% | 50,125 psi | 89% | 2690 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 49,632 psi | 88% | 2772 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 51,184 psi | 90% | 2864 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 92% | 50,473 psi | 89% | 2785 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 98% | 49,284 psi | 87% | 2822 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 86% | 49,153 psi | 87% | 2756 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 44,556 psi | 79% | 2713 fps | 99.4% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 50,981 psi | 90% | 2835 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 50,082 psi | 89% | 2848 fps | 96% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,056 psi | 62% | 1693 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 50,270 psi | 89% | 2756 fps | 99.8% |
| IMR 3031 | <<locked>> | 86% | 48,501 psi | 86% | 2743 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 49,066 psi | 87% | 2723 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 88% | 49,414 psi | 87% | 2697 fps | 96.3% |
| IMR 4350ᴾ | <<locked>> | 100% | 49,806 psi | 88% | 2759 fps | 95.9% |
| IMR 4451 Enduron | <<locked>> | 94% | 48,747 psi | 86% | 2720 fps | 96.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 46,804 psi | 83% | 2766 fps | 98.6% |
| IMR 4895 | <<locked>> | 90% | 51,010 psi | 90% | 2815 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 86% | 51,184 psi | 90% | 2749 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 50,720 psi | 90% | 2730 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 50,734 psi | 90% | 2769 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 48,979 psi | 87% | 2677 fps | 99.5% |
| Lovex S062 | <<locked>> | 90% | 48,646 psi | 86% | 2723 fps | 99.9% |
| Lovex S065 | <<locked>> | 98% | 50,879 psi | 90% | 2762 fps | 98% |
| Lovex S070 | <<locked>> | 98% | 48,370 psi | 86% | 2743 fps | 96.5% |
| Norma 201 | <<locked>> | 88% | 50,604 psi | 89% | 2740 fps | 100% |
| Norma 202 | <<locked>> | 88% | 51,024 psi | 90% | 2749 fps | 100% |
| Norma 203B | <<locked>> | 90% | 48,950 psi | 87% | 2772 fps | 99.6% |
| Norma URPᴾ | <<locked>> | 100% | 48,921 psi | 86% | 2818 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 90% | 48,878 psi | 86% | 2792 fps | 99.5% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 48,124 psi | 85% | 2808 fps | 97.2% |
| Ramshot TAC | <<locked>> | 84% | 48,138 psi | 85% | 2710 fps | 97.7% |
| Ramshot Wild Boar | <<locked>> | 86% | 50,546 psi | 89% | 2782 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 82% | 48,791 psi | 86% | 2697 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,288 psi | 62% | 1732 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 50,473 psi | 89% | 2730 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 50,937 psi | 90% | 2762 fps | 97.3% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 49,124 psi | 87% | 2838 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 48,965 psi | 87% | 2877 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 48,747 psi | 86% | 2844 fps | 98.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 49,748 psi | 88% | 2871 fps | 98.4% |
| Rottweil R 901 | <<locked>> | 84% | 48,718 psi | 86% | 2680 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 51,068 psi | 90% | 2740 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 48,863 psi | 86% | 2762 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 96% | 49,995 psi | 88% | 2736 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 98% | 50,879 psi | 90% | 2762 fps | 98% |
| Shooters World Match Rifle | <<locked>> | 88% | 50,734 psi | 90% | 2769 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 48,646 psi | 86% | 2723 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 98% | 48,370 psi | 86% | 2743 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 50,691 psi | 90% | 2828 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 49,356 psi | 87% | 2736 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 50,038 psi | 88% | 2762 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 49,458 psi | 87% | 2644 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 49,095 psi | 87% | 2638 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 47,935 psi | 85% | 2664 fps | 96% |
| Somchem S321 | <<locked>> | 82% | 48,602 psi | 86% | 2730 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 48,631 psi | 86% | 2641 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 49,008 psi | 87% | 2730 fps | 99.5% |
| Somchem S355 | <<locked>> | 94% | 49,487 psi | 87% | 2762 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 43,584 psi | 77% | 2769 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 82% | 49,356 psi | 87% | 2612 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 49,559 psi | 88% | 2631 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 50,357 psi | 89% | 2710 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 48,167 psi | 85% | 2677 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 50,894 psi | 90% | 2746 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 48,254 psi | 85% | 2762 fps | 98.6% |
| Vihtavuori N530 | <<locked>> | 84% | 48,254 psi | 85% | 2700 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 90% | 49,530 psi | 88% | 2720 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 50,531 psi | 89% | 2822 fps | 98.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 36,477 psi | 64% | 2638 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 49,081 psi | 87% | 2749 fps | 99.8% |
| Winchester 748 | <<locked>> | 86% | 50,821 psi | 90% | 2795 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 49,284 psi | 87% | 2822 fps | 96.6% |
| Winchester StaBALL Match | <<locked>> | 88% | 49,690 psi | 88% | 2772 fps | 99.8% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 27"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 43,729 psi | 77% | 2566 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 47,848 psi | 85% | 2674 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 36,390 psi | 64% | 2490 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 42,728 psi | 76% | 2631 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 34,432 psi | 61% | 2480 fps | 99.8% |
| Accurate 4350 | <<locked>> | 90% | 34,809 psi | 62% | 2552 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 40,364 psi | 71% | 2592 fps | 98.3% |
| ADI AR 2208 | <<locked>> | 80% | 34,389 psi | 61% | 2444 fps | 95.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,380 psi | 75% | 2602 fps | 99.4% |
| Alliant AR-Comp | <<locked>> | 80% | 41,684 psi | 74% | 2592 fps | 100% |
| Alliant Power Pro 2000-MR | 46.9 gr | 80% | 36,274 psi | 64% | 2602 fps | 96.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,460 psi | 59% | 2461 fps | 97.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,230 psi | 64% | 2526 fps | 96.8% |
| Alliant Reloder-16 | <<locked>> | 90% | 35,737 psi | 63% | 2566 fps | 95.8% |
| Alliant Reloder-17 | 47.4 gr | 82% | 30,966 psi | 55% | 2474 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 96% | 30,356 psi | 54% | 2457 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,160 psi | 69% | 2589 fps | 97% |
| Bofors RP3 | <<locked>> | 80% | 32,793 psi | 58% | 2461 fps | 97.4% |
| Bofors RP7 | <<locked>> | 94% | 46,934 psi | 83% | 2684 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,295 psi | 78% | 2595 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 40,538 psi | 72% | 2618 fps | 99.5% |
| Hodgdon CFE223 | <<locked>> | 80% | 44,469 psi | 79% | 2749 fps | 98.7% |
| Hodgdon H380 | <<locked>> | 82% | 36,172 psi | 64% | 2516 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 94% | 43,134 psi | 76% | 2710 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 40,712 psi | 72% | 2602 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 30,661 psi | 54% | 2411 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,405 psi | 64% | 2566 fps | 98.3% |
| Hodgdon Superformance | <<locked>> | 96% | 46,717 psi | 83% | 2789 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,875 psi | 46% | 1509 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,015 psi | 69% | 2552 fps | 98.4% |
| IMR 3031 | <<locked>> | 80% | 39,842 psi | 70% | 2602 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,027 psi | 64% | 2477 fps | 96.7% |
| IMR 4166 Enduron | <<locked>> | 86% | 46,470 psi | 82% | 2648 fps | 95.6% |
| IMR 4350 | <<locked>> | 98% | 46,789 psi | 83% | 2707 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 92% | 46,093 psi | 81% | 2671 fps | 95.4% |
| IMR 4831 | <<locked>> | 90% | 33,736 psi | 60% | 2507 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 37,028 psi | 65% | 2556 fps | 97.6% |
| IMR 8208 XBR | <<locked>> | 80% | 42,380 psi | 75% | 2602 fps | 99.4% |
| Lovex D073.5 | <<locked>> | 80% | 47,630 psi | 84% | 2684 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 38,827 psi | 69% | 2569 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 40,886 psi | 72% | 2533 fps | 98.4% |
| Lovex S062 | <<locked>> | 80% | 35,824 psi | 63% | 2484 fps | 98.4% |
| Lovex S065 | <<locked>> | 90% | 39,885 psi | 71% | 2566 fps | 95.5% |
| Lovex S070 | <<locked>> | 94% | 42,627 psi | 75% | 2641 fps | 95% |
| Norma 201 | <<locked>> | 80% | 39,494 psi | 70% | 2546 fps | 99.1% |
| Norma 202 | <<locked>> | 80% | 39,508 psi | 70% | 2556 fps | 100% |
| Norma 203B | <<locked>> | 80% | 35,621 psi | 63% | 2513 fps | 97.2% |
| Norma URP | <<locked>> | 90% | 35,418 psi | 63% | 2552 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 34,824 psi | 62% | 2516 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 96% | 42,264 psi | 75% | 2700 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 42,177 psi | 75% | 2598 fps | 96.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,423 psi | 73% | 2621 fps | 98.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 45,687 psi | 81% | 2644 fps | 99% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,165 psi | 46% | 1545 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 47,413 psi | 84% | 2680 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 42,047 psi | 74% | 2608 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 37,362 psi | 66% | 2615 fps | 97.1% |
| ReloadSwiss RS 60 | 46.2 gr | 80% | 30,792 psi | 54% | 2484 fps | 98.2% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 34,722 psi | 61% | 2566 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 38,043 psi | 67% | 2635 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 43,453 psi | 77% | 2592 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 37,623 psi | 67% | 2500 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 80% | 30,995 psi | 55% | 2408 fps | 96.4% |
| Rottweil R 907 | <<locked>> | 94% | 46,934 psi | 83% | 2684 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 90% | 39,885 psi | 71% | 2566 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,827 psi | 69% | 2569 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 35,824 psi | 63% | 2484 fps | 98.4% |
| Shooters World SW4350 | <<locked>> | 94% | 42,627 psi | 75% | 2641 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,068 psi | 57% | 2454 fps | 95.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 40,335 psi | 71% | 2572 fps | 96.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,783 psi | 69% | 2559 fps | 97.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,162 psi | 73% | 2507 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,939 psi | 60% | 2379 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 44,860 psi | 79% | 2615 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 45,411 psi | 80% | 2677 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 40,611 psi | 72% | 2510 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 39,914 psi | 71% | 2569 fps | 98.1% |
| Somchem S355 | <<locked>> | 80% | 32,010 psi | 57% | 2418 fps | 96.5% |
| Somchem S365 | <<locked>> | 84% | 26,223 psi | 46% | 2343 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 46,586 psi | 82% | 2569 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,350 psi | 73% | 2503 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 36,724 psi | 65% | 2490 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,492 psi | 66% | 2493 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 30,371 psi | 54% | 2359 fps | 97.4% |
| Vihtavuori N160 | <<locked>> | 88% | 34,969 psi | 62% | 2507 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 42,148 psi | 75% | 2592 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 80% | 35,984 psi | 64% | 2484 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 90% | 36,347 psi | 64% | 2556 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 96% | 32,024 psi | 57% | 2533 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 29,066 psi | 51% | 2329 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 41,365 psi | 73% | 2638 fps | 99.8% |
| Winchester 760 | <<locked>> | 94% | 43,424 psi | 77% | 2717 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,898 psi | 67% | 2556 fps | 98.3% |
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 106 powders for 7.62 x 53 R Fin. loaded with the .308 | 170gr | Prvi Partizan FSP. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,900 fps; across all powders the maximum-charge window runs from 1,693 fps to 2,900 fps. Accurate 3100 gives the best case fill at 100 %, and 106 of the 106 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (390 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.308" calls for a 1:16.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, ADI AR 2209 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, Alliant Power Pro 2000-MR rank at the top here: for 7.62 x 53 R Fin. with the .308 | 170gr | Prvi Partizan FSP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, ADI AR 2209, Alliant Reloder-19 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.