
Load Specifications
Load data in caliber 7.5 x 55 Swiss with .308 | 168gr | Sierra MatchKing bullet and 93 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, ReloadSwiss RS 60 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: 31"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 82% | 47,485 psi | 86% | 2671 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 48,153 psi | 87% | 2736 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 46,760 psi | 85% | 2749 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 48,269 psi | 88% | 2723 fps | 96.3% |
| Accurate 4064 | <<locked>> | 90% | 48,298 psi | 88% | 2785 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 46,833 psi | 85% | 2851 fps | 99.3% |
| ADI AR 2206H | <<locked>> | 86% | 49,574 psi | 90% | 2818 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 90% | 47,427 psi | 86% | 2766 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 84% | 48,776 psi | 89% | 2769 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 48,617 psi | 88% | 2743 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 48,327 psi | 88% | 2923 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 46,789 psi | 85% | 2785 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 47,369 psi | 86% | 2805 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,269 psi | 89% | 2910 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 94% | 46,630 psi | 85% | 2894 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 34,867 psi | 63% | 2654 fps | 98.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 38,348 psi | 70% | 2795 fps | 97.4% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 48,834 psi | 89% | 2828 fps | 99.5% |
| Bofors RP3 | <<locked>> | 90% | 46,688 psi | 85% | 2795 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 47,688 psi | 87% | 2762 fps | 96.5% |
| Hodgdon Benchmark | <<locked>> | 82% | 47,674 psi | 87% | 2703 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 47,282 psi | 86% | 2795 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 48,791 psi | 89% | 2887 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 90% | 48,138 psi | 87% | 2808 fps | 99% |
| Hodgdon H414 | <<locked>> | 96% | 46,992 psi | 85% | 2848 fps | 97.2% |
| Hodgdon H4350 | <<locked>> | 94% | 48,298 psi | 88% | 2812 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 84% | 46,891 psi | 85% | 2776 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,237 psi | 82% | 2785 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 48,675 psi | 88% | 2858 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 47,688 psi | 87% | 2877 fps | 96.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,128 psi | 64% | 1719 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 47,950 psi | 87% | 2779 fps | 99.9% |
| IMR 3031 | <<locked>> | 86% | 49,327 psi | 90% | 2805 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 46,804 psi | 85% | 2743 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 86% | 47,210 psi | 86% | 2720 fps | 96.9% |
| IMR 4350 | <<locked>> | 98% | 47,471 psi | 86% | 2782 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 94% | 49,748 psi | 90% | 2799 fps | 97.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,950 psi | 87% | 2848 fps | 99.4% |
| IMR 4895 | <<locked>> | 88% | 48,544 psi | 88% | 2835 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 84% | 48,776 psi | 89% | 2769 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 48,573 psi | 88% | 2789 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 49,603 psi | 90% | 2743 fps | 99.9% |
| Lovex S062 | <<locked>> | 90% | 49,574 psi | 90% | 2792 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 48,617 psi | 88% | 2789 fps | 98.5% |
| Lovex S070 | <<locked>> | 98% | 49,313 psi | 89% | 2822 fps | 97.7% |
| Norma 201 | <<locked>> | 86% | 48,530 psi | 88% | 2762 fps | 100% |
| Norma 202 | <<locked>> | 86% | 48,675 psi | 88% | 2766 fps | 100% |
| Norma 203B | <<locked>> | 90% | 49,719 psi | 90% | 2841 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 49,748 psi | 90% | 2894 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 90% | 49,821 psi | 90% | 2867 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 49,066 psi | 89% | 2894 fps | 98.4% |
| Ramshot TAC | <<locked>> | 84% | 48,791 psi | 89% | 2779 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 84% | 48,153 psi | 87% | 2802 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 82% | 49,632 psi | 90% | 2769 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,389 psi | 64% | 1759 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 48,704 psi | 88% | 2789 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 46,978 psi | 85% | 2864 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 49,705 psi | 90% | 2949 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 46,688 psi | 85% | 2874 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 47,355 psi | 86% | 2900 fps | 98.9% |
| Rottweil R 901 | <<locked>> | 84% | 49,559 psi | 90% | 2743 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 48,718 psi | 88% | 2756 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 49,748 psi | 90% | 2835 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 47,688 psi | 87% | 2762 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 96% | 48,617 psi | 88% | 2789 fps | 98.5% |
| Shooters World Match Rifle | <<locked>> | 86% | 48,573 psi | 88% | 2789 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 49,574 psi | 90% | 2792 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 49,313 psi | 89% | 2822 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 48,196 psi | 87% | 2848 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 46,992 psi | 85% | 2756 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 47,950 psi | 87% | 2789 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 47,123 psi | 86% | 2657 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 47,065 psi | 85% | 2657 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 48,863 psi | 89% | 2740 fps | 97.3% |
| Somchem S321 | <<locked>> | 82% | 49,545 psi | 90% | 2799 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 49,632 psi | 90% | 2703 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 49,864 psi | 90% | 2802 fps | 99.9% |
| Somchem S355 | <<locked>> | 92% | 47,427 psi | 86% | 2789 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,367 psi | 81% | 2844 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 47,311 psi | 86% | 2644 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 48,240 psi | 88% | 2726 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 49,052 psi | 89% | 2743 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 48,573 psi | 88% | 2766 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 49,037 psi | 89% | 2838 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 84% | 49,037 psi | 89% | 2766 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 47,471 psi | 86% | 2743 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 48,283 psi | 88% | 2848 fps | 99.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 37,391 psi | 68% | 2730 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 49,719 psi | 90% | 2818 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 48,312 psi | 88% | 2812 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 47,297 psi | 86% | 2854 fps | 97.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 31,212 psi | 57% | 2644 fps | 98.1% |
| Winchester StaBALL Match | <<locked>> | 86% | 47,398 psi | 86% | 2792 fps | 99.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 31"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 44,411 psi | 81% | 2625 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,159 psi | 67% | 2556 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,787 psi | 79% | 2703 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 45,324 psi | 82% | 2671 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 35,114 psi | 64% | 2552 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 31,024 psi | 56% | 2530 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 40,872 psi | 74% | 2661 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 80% | 34,954 psi | 63% | 2520 fps | 97.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,902 psi | 78% | 2667 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 42,525 psi | 77% | 2651 fps | 100% |
| Alliant Power Pro 2000-MR | 45.9 gr | 80% | 36,869 psi | 67% | 2687 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,127 psi | 62% | 2536 fps | 98.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,724 psi | 67% | 2598 fps | 98% |
| Alliant Reloder-16 | <<locked>> | 86% | 32,082 psi | 58% | 2539 fps | 95.7% |
| Alliant Reloder-17 | 45.2 gr | 80% | 29,414 psi | 53% | 2500 fps | 96.6% |
| Alliant Reloder-23 | <<locked>> | 92% | 27,485 psi | 50% | 2444 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 96% | 33,489 psi | 61% | 2674 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,856 psi | 72% | 2664 fps | 98.2% |
| Bofors RP3 | <<locked>> | 80% | 33,562 psi | 61% | 2539 fps | 98.6% |
| Bofors RP7 | <<locked>> | 90% | 42,148 psi | 76% | 2661 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,020 psi | 82% | 2661 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,263 psi | 75% | 2690 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,397 psi | 82% | 2828 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 80% | 34,650 psi | 63% | 2543 fps | 96.1% |
| Hodgdon H414 | <<locked>> | 90% | 38,711 psi | 70% | 2687 fps | 95% |
| Hodgdon H4350 | <<locked>> | 92% | 45,295 psi | 82% | 2759 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 41,234 psi | 75% | 2674 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 27,557 psi | 50% | 2388 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,028 psi | 67% | 2641 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 92% | 41,466 psi | 75% | 2756 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,991 psi | 47% | 1535 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,726 psi | 72% | 2628 fps | 99.2% |
| IMR 3031 | <<locked>> | 80% | 40,625 psi | 74% | 2667 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,666 psi | 67% | 2549 fps | 98% |
| IMR 4166 Enduron | <<locked>> | 82% | 41,597 psi | 75% | 2615 fps | 95.5% |
| IMR 4350 | <<locked>> | 94% | 42,047 psi | 76% | 2684 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 41,481 psi | 75% | 2648 fps | 95.4% |
| IMR 4831 | <<locked>> | 86% | 30,414 psi | 55% | 2490 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 37,608 psi | 68% | 2628 fps | 98.7% |
| IMR 8208 XBR | <<locked>> | 80% | 42,902 psi | 78% | 2667 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 39,523 psi | 72% | 2638 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 41,510 psi | 75% | 2602 fps | 99.2% |
| Lovex S062 | <<locked>> | 80% | 36,477 psi | 66% | 2556 fps | 99.3% |
| Lovex S065 | <<locked>> | 86% | 35,984 psi | 65% | 2546 fps | 95.5% |
| Lovex S070 | <<locked>> | 90% | 38,392 psi | 70% | 2618 fps | 95% |
| Norma 201 | <<locked>> | 80% | 40,205 psi | 73% | 2618 fps | 99.7% |
| Norma 202 | <<locked>> | 80% | 40,219 psi | 73% | 2625 fps | 100% |
| Norma 203B | <<locked>> | 80% | 36,129 psi | 66% | 2589 fps | 98.3% |
| Norma URP | <<locked>> | 86% | 31,952 psi | 58% | 2536 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 35,505 psi | 64% | 2598 fps | 98% |
| Ramshot Hunter | <<locked>> | 92% | 37,855 psi | 69% | 2674 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 42,873 psi | 78% | 2674 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,163 psi | 77% | 2697 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,383 psi | 84% | 2713 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,295 psi | 48% | 1572 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 37,579 psi | 68% | 2579 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 38,000 psi | 69% | 2694 fps | 98.3% |
| ReloadSwiss RS 60 | 45.2 gr | 80% | 31,328 psi | 57% | 2569 fps | 99.4% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 31,140 psi | 56% | 2543 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 33,866 psi | 61% | 2602 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 44,121 psi | 80% | 2654 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 38,261 psi | 69% | 2569 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 80% | 31,662 psi | 57% | 2487 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 90% | 42,148 psi | 76% | 2661 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 86% | 35,984 psi | 65% | 2546 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,523 psi | 72% | 2638 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 36,477 psi | 66% | 2556 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 90% | 38,392 psi | 70% | 2618 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,576 psi | 59% | 2533 fps | 97.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,060 psi | 75% | 2648 fps | 97.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,392 psi | 71% | 2631 fps | 98.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,727 psi | 76% | 2569 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,476 psi | 63% | 2441 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 39,885 psi | 72% | 2585 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 46,195 psi | 84% | 2746 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 41,249 psi | 75% | 2572 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 40,640 psi | 74% | 2644 fps | 99% |
| Somchem S355 | <<locked>> | 80% | 32,648 psi | 59% | 2493 fps | 97.8% |
| Somchem S365 | <<locked>> | 80% | 23,612 psi | 43% | 2323 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 41,959 psi | 76% | 2562 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,405 psi | 68% | 2552 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,203 psi | 69% | 2562 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,024 psi | 56% | 2434 fps | 98.6% |
| Vihtavuori N160 | <<locked>> | 84% | 31,314 psi | 57% | 2480 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 42,989 psi | 78% | 2664 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 36,753 psi | 67% | 2556 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 32,706 psi | 59% | 2539 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 92% | 28,921 psi | 52% | 2516 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 27,673 psi | 50% | 2352 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 42,076 psi | 76% | 2707 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 38,711 psi | 70% | 2687 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 96% | 27,412 psi | 50% | 2510 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,783 psi | 70% | 2638 fps | 99.2% |
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 110 powders for 7.5 x 55 Swiss loaded with the .308 | 168gr | Sierra MatchKing. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,949 fps; across all powders the maximum-charge window runs from 1,719 fps to 2,949 fps. Accurate 3100 gives the best case fill at 100 %, and 110 of the 110 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 168.0 gr projectile in 0.308" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-16 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, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for 7.5 x 55 Swiss with the .308 | 168gr | Sierra MatchKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2209, Alliant Reloder-19, Alliant Reloder-22 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.