Load Specifications
Load data in caliber .260 Rem. with .263 | 120gr | Rhino Solid Shank 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 Winchester 760.
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>> | 82% | 51,634 psi | 86% | 2726 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 53,882 psi | 90% | 2802 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 51,764 psi | 86% | 2812 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 52,939 psi | 88% | 2792 fps | 96.4% |
| Accurate 4064 | <<locked>> | 90% | 53,896 psi | 90% | 2848 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 53,229 psi | 88% | 2920 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 86% | 54,099 psi | 90% | 2874 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 90% | 51,779 psi | 86% | 2822 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 84% | 53,200 psi | 88% | 2828 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 53,766 psi | 89% | 2802 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 53,780 psi | 89% | 2992 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 51,938 psi | 86% | 2848 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 52,228 psi | 87% | 2864 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 98% | 51,488 psi | 86% | 2930 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 94% | 52,286 psi | 87% | 2963 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,233 psi | 65% | 2713 fps | 98.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,671 psi | 73% | 2871 fps | 97.8% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 53,838 psi | 89% | 2887 fps | 99.5% |
| Bofors RP3 | <<locked>> | 90% | 52,272 psi | 87% | 2861 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 52,562 psi | 87% | 2828 fps | 96.6% |
| Hodgdon Benchmark | <<locked>> | 82% | 51,648 psi | 86% | 2762 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 52,359 psi | 87% | 2854 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 54,375 psi | 90% | 2953 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 90% | 53,374 psi | 89% | 2874 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 96% | 52,837 psi | 88% | 2920 fps | 97.4% |
| Hodgdon H4350 | <<locked>> | 94% | 53,635 psi | 89% | 2884 fps | 96.1% |
| Hodgdon H4895 | <<locked>> | 84% | 51,387 psi | 85% | 2835 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 51,039 psi | 85% | 2858 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 53,911 psi | 90% | 2917 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 53,258 psi | 88% | 2949 fps | 97% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,534 psi | 59% | 1762 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 52,576 psi | 87% | 2838 fps | 99.9% |
| IMR 3031 | <<locked>> | 84% | 51,271 psi | 85% | 2822 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 51,227 psi | 85% | 2805 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 86% | 51,372 psi | 85% | 2782 fps | 96.9% |
| IMR 4350 | <<locked>> | 98% | 52,721 psi | 88% | 2854 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 94% | 54,447 psi | 90% | 2861 fps | 97.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 54,143 psi | 90% | 2920 fps | 99.5% |
| IMR 4895 | <<locked>> | 88% | 53,563 psi | 89% | 2894 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 84% | 53,200 psi | 88% | 2828 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 53,795 psi | 89% | 2851 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 53,621 psi | 89% | 2802 fps | 99.9% |
| Lovex S062 | <<locked>> | 90% | 54,404 psi | 90% | 2854 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 53,911 psi | 90% | 2858 fps | 98.6% |
| Lovex S070 | <<locked>> | 98% | 54,462 psi | 90% | 2887 fps | 97.8% |
| Norma 201 | <<locked>> | 86% | 53,127 psi | 88% | 2825 fps | 100% |
| Norma 202 | <<locked>> | 86% | 53,548 psi | 89% | 2825 fps | 100% |
| Norma 203B | <<locked>> | 88% | 51,445 psi | 85% | 2851 fps | 99.8% |
| Norma URP | <<locked>> | 98% | 52,315 psi | 87% | 2910 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 88% | 52,011 psi | 86% | 2877 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 98% | 51,314 psi | 85% | 2904 fps | 97.9% |
| Ramshot TAC | <<locked>> | 84% | 53,359 psi | 89% | 2841 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 84% | 52,852 psi | 88% | 2858 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 82% | 53,940 psi | 90% | 2825 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,013 psi | 60% | 1804 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 53,476 psi | 89% | 2851 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 52,533 psi | 87% | 2927 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 51,909 psi | 86% | 2963 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 53,069 psi | 88% | 2946 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 52,852 psi | 88% | 2972 fps | 99% |
| Rottweil R 901 | <<locked>> | 84% | 54,143 psi | 90% | 2805 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 53,505 psi | 89% | 2822 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 52,069 psi | 87% | 2851 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 52,562 psi | 87% | 2828 fps | 96.6% |
| Shooters World Long Rifle | <<locked>> | 96% | 53,911 psi | 90% | 2858 fps | 98.6% |
| Shooters World Match Rifle | <<locked>> | 86% | 53,795 psi | 89% | 2851 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,404 psi | 90% | 2854 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 54,462 psi | 90% | 2887 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 54,027 psi | 90% | 2913 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 51,764 psi | 86% | 2818 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 52,576 psi | 87% | 2844 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 51,198 psi | 85% | 2713 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 51,358 psi | 85% | 2717 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 53,998 psi | 90% | 2805 fps | 97.4% |
| Somchem S321 | <<locked>> | 82% | 54,128 psi | 90% | 2854 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 54,041 psi | 90% | 2762 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 51,300 psi | 85% | 2808 fps | 99.7% |
| Somchem S355 | <<locked>> | 92% | 52,692 psi | 88% | 2851 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,328 psi | 84% | 2913 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 54,099 psi | 90% | 2723 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 51,488 psi | 86% | 2703 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 53,055 psi | 88% | 2785 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 53,998 psi | 90% | 2802 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 53,853 psi | 89% | 2828 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 51,517 psi | 86% | 2854 fps | 99.1% |
| Vihtavuori N530 | <<locked>> | 84% | 53,548 psi | 89% | 2825 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 52,127 psi | 87% | 2799 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 54,041 psi | 90% | 2913 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,931 psi | 71% | 2792 fps | 98.5% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 51,909 psi | 86% | 2835 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 53,490 psi | 89% | 2874 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 52,837 psi | 88% | 2920 fps | 97.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,867 psi | 58% | 2700 fps | 98.2% |
| Winchester StaBALL Match | <<locked>> | 86% | 52,504 psi | 87% | 2854 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% | 48,820 psi | 81% | 2687 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,539 psi | 69% | 2612 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,544 psi | 81% | 2762 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 49,472 psi | 82% | 2733 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 39,276 psi | 65% | 2602 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 35,186 psi | 58% | 2579 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 44,976 psi | 75% | 2717 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 80% | 38,189 psi | 63% | 2562 fps | 97.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,036 psi | 78% | 2726 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 47,427 psi | 79% | 2713 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,886 psi | 68% | 2746 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,913 psi | 63% | 2589 fps | 98.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,669 psi | 68% | 2651 fps | 97.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 35,462 psi | 59% | 2595 fps | 95.7% |
| Alliant Reloder-17 | 38.6 gr | 80% | 32,706 psi | 54% | 2549 fps | 96.5% |
| Alliant Reloder-23 | <<locked>> | 92% | 30,676 psi | 51% | 2493 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 96% | 37,884 psi | 63% | 2736 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,208 psi | 73% | 2720 fps | 98.2% |
| Bofors RP3 | <<locked>> | 80% | 37,536 psi | 62% | 2592 fps | 98.5% |
| Bofors RP7 | <<locked>> | 90% | 46,441 psi | 77% | 2720 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,631 psi | 81% | 2710 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,977 psi | 76% | 2749 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,691 psi | 84% | 2894 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 80% | 38,392 psi | 64% | 2592 fps | 96% |
| Hodgdon H414 | <<locked>> | 90% | 43,062 psi | 72% | 2743 fps | 95% |
| Hodgdon H4350 | <<locked>> | 92% | 50,111 psi | 83% | 2822 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 45,397 psi | 75% | 2730 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,443 psi | 51% | 2431 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,263 psi | 69% | 2697 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 92% | 46,296 psi | 77% | 2825 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,455 psi | 44% | 1575 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,308 psi | 72% | 2674 fps | 99.2% |
| IMR 3031 | <<locked>> | 80% | 44,860 psi | 75% | 2720 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,103 psi | 67% | 2598 fps | 97.8% |
| IMR 4166 Enduron | <<locked>> | 82% | 45,165 psi | 75% | 2671 fps | 95.5% |
| IMR 4350 | <<locked>> | 94% | 46,673 psi | 78% | 2746 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 88% | 45,411 psi | 75% | 2703 fps | 95.4% |
| IMR 4831 | <<locked>> | 86% | 34,200 psi | 57% | 2539 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 41,655 psi | 69% | 2684 fps | 98.6% |
| IMR 8208 XBR | <<locked>> | 80% | 47,036 psi | 78% | 2726 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 44,121 psi | 73% | 2697 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,962 psi | 75% | 2654 fps | 99.1% |
| Lovex S062 | <<locked>> | 80% | 40,103 psi | 67% | 2605 fps | 99.2% |
| Lovex S065 | <<locked>> | 86% | 39,668 psi | 66% | 2595 fps | 95.5% |
| Lovex S070 | <<locked>> | 90% | 42,554 psi | 71% | 2674 fps | 95% |
| Norma 201 | <<locked>> | 80% | 44,048 psi | 73% | 2671 fps | 99.6% |
| Norma 202 | <<locked>> | 80% | 44,367 psi | 74% | 2677 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,089 psi | 67% | 2641 fps | 98.3% |
| Norma URP | <<locked>> | 86% | 35,563 psi | 59% | 2582 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 39,595 psi | 66% | 2651 fps | 98% |
| Ramshot Hunter | <<locked>> | 92% | 42,337 psi | 70% | 2736 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 46,702 psi | 78% | 2726 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,456 psi | 77% | 2753 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,473 psi | 84% | 2772 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,701 psi | 44% | 1611 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 41,321 psi | 69% | 2631 fps | 95.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,830 psi | 71% | 2756 fps | 98.4% |
| ReloadSwiss RS 60 | 38.6 gr | 80% | 34,795 psi | 58% | 2618 fps | 99.3% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 34,969 psi | 58% | 2595 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 37,666 psi | 63% | 2661 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 47,848 psi | 79% | 2707 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,727 psi | 69% | 2615 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 80% | 35,331 psi | 59% | 2533 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 90% | 46,441 psi | 77% | 2720 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 86% | 39,668 psi | 66% | 2595 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,121 psi | 73% | 2697 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,103 psi | 67% | 2605 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 90% | 42,554 psi | 71% | 2674 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,245 psi | 60% | 2582 fps | 97.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,049 psi | 75% | 2700 fps | 97.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,468 psi | 72% | 2687 fps | 98.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,411 psi | 75% | 2625 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,797 psi | 63% | 2490 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 44,324 psi | 74% | 2641 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 50,966 psi | 85% | 2805 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,020 psi | 75% | 2625 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,005 psi | 75% | 2700 fps | 99% |
| Somchem S355 | <<locked>> | 80% | 36,158 psi | 60% | 2539 fps | 97.7% |
| Somchem S365 | <<locked>> | 80% | 26,266 psi | 44% | 2362 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 51,198 psi | 85% | 2684 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,730 psi | 76% | 2615 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,437 psi | 69% | 2605 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,989 psi | 70% | 2612 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,403 psi | 57% | 2477 fps | 98.5% |
| Vihtavuori N160 | <<locked>> | 84% | 34,766 psi | 58% | 2530 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 47,152 psi | 78% | 2723 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 40,480 psi | 67% | 2602 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 36,593 psi | 61% | 2585 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 92% | 32,764 psi | 54% | 2566 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,501 psi | 51% | 2398 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 46,833 psi | 78% | 2766 fps | 100% |
| Winchester 760 | 42.5 gr | 90% | 43,410 psi | 72% | 2749 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 96% | 30,879 psi | 51% | 2575 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,989 psi | 71% | 2690 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 94 powders for .260 Rem. loaded with the .263 | 120gr | Rhino Solid Shank. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,992 fps; across all powders the maximum-charge window runs from 1,762 fps to 2,992 fps. Alliant Reloder-23 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 58–90 %, leaving at least 10 % headroom. The 120.0 gr projectile in 0.263" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-26, Hodgdon Hybrid 100V 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, Winchester 760 rank at the top here: for .260 Rem. with the .263 | 120gr | Rhino Solid Shank 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.