Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 150gr | Barnes RRLP 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 Reloder-17, ReloadSwiss RS 60 and Hodgdon H414.
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>> | 84% | 56,159 psi | 90% | 2930 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 55,332 psi | 89% | 2956 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 53,142 psi | 85% | 2966 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 54,244 psi | 87% | 2946 fps | 96.3% |
| Accurate 4064 | <<locked>> | 90% | 55,245 psi | 89% | 3002 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 55,245 psi | 89% | 3087 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 86% | 55,448 psi | 89% | 3035 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 90% | 53,069 psi | 85% | 2976 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 84% | 54,302 psi | 87% | 2982 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 55,419 psi | 89% | 2963 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 55,274 psi | 89% | 3156 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 53,098 psi | 85% | 3002 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 53,766 psi | 86% | 3025 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 56,246 psi | 90% | 3146 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 94% | 53,940 psi | 86% | 3127 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,393 psi | 65% | 2861 fps | 98.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,339 psi | 73% | 3025 fps | 97.8% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 55,405 psi | 89% | 3048 fps | 99.5% |
| Bofors RP3 | <<locked>> | 90% | 53,751 psi | 86% | 3018 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 53,896 psi | 86% | 2982 fps | 96.5% |
| Hodgdon Benchmark | <<locked>> | 84% | 56,115 psi | 90% | 2966 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 53,882 psi | 86% | 3012 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 55,738 psi | 89% | 3114 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 90% | 54,737 psi | 88% | 3031 fps | 99% |
| Hodgdon H414 | <<locked>> | 96% | 54,230 psi | 87% | 3074 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 94% | 55,042 psi | 88% | 3041 fps | 96% |
| Hodgdon H4895 | <<locked>> | 86% | 55,999 psi | 90% | 3045 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 52,460 psi | 84% | 3012 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 55,463 psi | 89% | 3077 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 55,114 psi | 88% | 3114 fps | 97% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,476 psi | 57% | 1870 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 53,693 psi | 86% | 2992 fps | 99.9% |
| IMR 3031 | <<locked>> | 86% | 55,999 psi | 90% | 3028 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 55,869 psi | 90% | 3015 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 88% | 55,999 psi | 90% | 2995 fps | 97.5% |
| IMR 4350 | <<locked>> | 98% | 54,056 psi | 87% | 3005 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 94% | 55,709 psi | 89% | 3018 fps | 97.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 55,637 psi | 89% | 3074 fps | 99.5% |
| IMR 4895 | <<locked>> | 88% | 55,143 psi | 88% | 3058 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 84% | 54,302 psi | 87% | 2982 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 55,332 psi | 89% | 3009 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 54,824 psi | 88% | 2959 fps | 99.8% |
| Lovex S062 | <<locked>> | 90% | 55,956 psi | 90% | 3015 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 55,143 psi | 88% | 3012 fps | 98.5% |
| Lovex S070 | <<locked>> | 98% | 56,231 psi | 90% | 3048 fps | 97.8% |
| Norma 201 | <<locked>> | 86% | 54,128 psi | 87% | 2976 fps | 100% |
| Norma 202 | <<locked>> | 86% | 54,607 psi | 88% | 2979 fps | 100% |
| Norma 203B | <<locked>> | 90% | 56,289 psi | 90% | 3064 fps | 99.9% |
| Norma URP | <<locked>> | 98% | 54,230 psi | 87% | 3071 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 88% | 53,403 psi | 86% | 3035 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 98% | 53,026 psi | 85% | 3061 fps | 97.9% |
| Ramshot TAC | <<locked>> | 84% | 54,621 psi | 88% | 2995 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 84% | 54,418 psi | 87% | 3018 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 82% | 55,071 psi | 88% | 2979 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,056 psi | 58% | 1916 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 54,926 psi | 88% | 3009 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 54,070 psi | 87% | 3091 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 53,751 psi | 86% | 3130 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 54,897 psi | 88% | 3104 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 54,549 psi | 87% | 3133 fps | 99% |
| Rottweil R 901 | <<locked>> | 84% | 55,230 psi | 89% | 2963 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 54,694 psi | 88% | 2976 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 53,592 psi | 86% | 3009 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 94% | 53,896 psi | 86% | 2982 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 96% | 55,143 psi | 88% | 3012 fps | 98.5% |
| Shooters World Match Rifle | <<locked>> | 86% | 55,332 psi | 89% | 3009 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 55,956 psi | 90% | 3015 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 56,231 psi | 90% | 3048 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 55,521 psi | 89% | 3074 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 53,098 psi | 85% | 2972 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 53,824 psi | 86% | 2999 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 55,535 psi | 89% | 2917 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 55,956 psi | 90% | 2917 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 55,521 psi | 89% | 2963 fps | 97.4% |
| Somchem S321 | <<locked>> | 82% | 55,550 psi | 89% | 3015 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 54,998 psi | 88% | 2913 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 52,721 psi | 85% | 2966 fps | 99.7% |
| Somchem S355 | <<locked>> | 92% | 53,882 psi | 86% | 3005 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 52,156 psi | 84% | 3074 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 55,216 psi | 89% | 2877 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 55,811 psi | 89% | 2900 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 54,491 psi | 87% | 2943 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 55,259 psi | 89% | 2956 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 55,477 psi | 89% | 2986 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 53,011 psi | 85% | 3012 fps | 99.1% |
| Vihtavuori N530 | <<locked>> | 84% | 54,969 psi | 88% | 2982 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 53,548 psi | 86% | 2953 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 55,883 psi | 90% | 3074 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,367 psi | 71% | 2940 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 53,287 psi | 85% | 2989 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 54,839 psi | 88% | 3031 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 54,491 psi | 87% | 3081 fps | 97.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,187 psi | 58% | 2851 fps | 98.2% |
| Winchester StaBALL Match | <<locked>> | 86% | 53,795 psi | 86% | 3009 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% | 49,647 psi | 80% | 2835 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 42,453 psi | 68% | 2753 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 49,734 psi | 80% | 2913 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 50,879 psi | 82% | 2890 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 40,147 psi | 64% | 2743 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 36,347 psi | 58% | 2720 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 45,847 psi | 74% | 2864 fps | 99% |
| ADI AR 2208 | <<locked>> | 80% | 39,001 psi | 63% | 2703 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,935 psi | 77% | 2874 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 48,443 psi | 78% | 2864 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,901 psi | 67% | 2894 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,682 psi | 62% | 2726 fps | 98.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,553 psi | 67% | 2792 fps | 97.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 36,376 psi | 58% | 2736 fps | 95.5% |
| Alliant Reloder-17 | 57.4 gr | 80% | 33,504 psi | 54% | 2687 fps | 96.2% |
| Alliant Reloder-23 | <<locked>> | 92% | 31,415 psi | 50% | 2621 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 96% | 39,392 psi | 63% | 2890 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,252 psi | 73% | 2867 fps | 98% |
| Bofors RP3 | <<locked>> | 80% | 38,464 psi | 62% | 2730 fps | 98.4% |
| Bofors RP7 | <<locked>> | 90% | 47,543 psi | 76% | 2867 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,661 psi | 80% | 2864 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,065 psi | 75% | 2897 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 51,909 psi | 83% | 3051 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 80% | 39,247 psi | 63% | 2733 fps | 95.8% |
| Hodgdon H414 | 64.5 gr | 92% | 47,471 psi | 76% | 2953 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 92% | 51,561 psi | 83% | 2979 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 46,296 psi | 74% | 2877 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 31,372 psi | 50% | 2569 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,308 psi | 68% | 2841 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 92% | 47,572 psi | 76% | 2976 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,411 psi | 42% | 1673 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,353 psi | 71% | 2825 fps | 99.1% |
| IMR 3031 | <<locked>> | 80% | 46,151 psi | 74% | 2874 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,915 psi | 66% | 2740 fps | 97.7% |
| IMR 4166 Enduron | <<locked>> | 82% | 46,224 psi | 74% | 2818 fps | 95.3% |
| IMR 4350 | <<locked>> | 94% | 47,703 psi | 76% | 2894 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 46,253 psi | 74% | 2844 fps | 95.2% |
| IMR 4831 | <<locked>> | 86% | 35,114 psi | 56% | 2674 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 42,569 psi | 68% | 2825 fps | 98.5% |
| IMR 8208 XBR | <<locked>> | 80% | 47,935 psi | 77% | 2874 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 45,295 psi | 73% | 2844 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,687 psi | 73% | 2799 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 40,886 psi | 66% | 2746 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 40,509 psi | 65% | 2733 fps | 95.2% |
| Lovex S070 | <<locked>> | 92% | 46,470 psi | 75% | 2874 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 44,875 psi | 72% | 2815 fps | 99.6% |
| Norma 202 | <<locked>> | 80% | 45,252 psi | 73% | 2825 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,915 psi | 66% | 2782 fps | 98.1% |
| Norma URP | <<locked>> | 86% | 36,593 psi | 59% | 2723 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 40,654 psi | 65% | 2795 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 92% | 43,569 psi | 70% | 2881 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 47,921 psi | 77% | 2881 fps | 97.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,398 psi | 76% | 2897 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,750 psi | 83% | 2927 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,847 psi | 43% | 1716 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 45,078 psi | 72% | 2831 fps | 95.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,961 psi | 70% | 2904 fps | 98.2% |
| ReloadSwiss RS 60 | 57.4 gr | 80% | 35,665 psi | 57% | 2759 fps | 99.2% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 38,609 psi | 62% | 2795 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 41,292 psi | 66% | 2867 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 48,979 psi | 79% | 2861 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,656 psi | 68% | 2762 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 36,158 psi | 58% | 2671 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 90% | 47,543 psi | 76% | 2867 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 86% | 40,509 psi | 65% | 2733 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 45,295 psi | 73% | 2844 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,886 psi | 66% | 2746 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 92% | 46,470 psi | 75% | 2874 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,144 psi | 60% | 2720 fps | 96.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,325 psi | 74% | 2851 fps | 97.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,382 psi | 71% | 2831 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,093 psi | 74% | 2769 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,450 psi | 62% | 2625 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 45,672 psi | 73% | 2792 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 52,112 psi | 84% | 2959 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,803 psi | 73% | 2769 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,108 psi | 74% | 2851 fps | 98.9% |
| Somchem S355 | <<locked>> | 80% | 36,912 psi | 59% | 2677 fps | 97.5% |
| Somchem S365 | <<locked>> | 82% | 28,761 psi | 46% | 2549 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 51,953 psi | 83% | 2831 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,470 psi | 75% | 2762 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,221 psi | 68% | 2746 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,844 psi | 69% | 2756 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,128 psi | 56% | 2608 fps | 98.3% |
| Vihtavuori N160 | <<locked>> | 86% | 38,189 psi | 61% | 2726 fps | 95.9% |
| Vihtavuori N530 | <<locked>> | 80% | 48,124 psi | 77% | 2871 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 41,394 psi | 66% | 2740 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 37,681 psi | 60% | 2726 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 92% | 34,055 psi | 55% | 2707 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,256 psi | 50% | 2526 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 48,008 psi | 77% | 2920 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 44,599 psi | 72% | 2897 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 96% | 31,807 psi | 51% | 2710 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,976 psi | 71% | 2835 fps | 99.1% |
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 .300 H&H Mag. loaded with the .308 | 150gr | Barnes RRLP. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,156 fps; across all powders the maximum-charge window runs from 1,870 fps to 3,156 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 (430 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:11.0 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 Reloder-17, ReloadSwiss RS 60, Hodgdon H414 rank at the top here: for .300 H&H Mag. with the .308 | 150gr | Barnes RRLP 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.