Load Specifications
Bullet Manufacturer:Nosler
Bullet Weight:150 gr
Bullet Diameter:0.308"
Bullet Length:<<locked>>
Caliber:.300 H&H Mag. load data
Case Length (l3):2.85"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:85.9 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:62,366 psi
Recommended Twist Rate:1:12.0
Load data in caliber .300 H&H Mag. with .308 | 150gr | Nosler Expansion Tip bullet and 94 powders. The key underlying parameters are shown in the table above.
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% | 55,390 psi | 89% | 2930 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 53,925 psi | 86% | 2946 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 56,115 psi | 90% | 3022 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 53,708 psi | 86% | 2949 fps | 96.3% |
| Accurate 4064 | <<locked>> | 90% | 54,215 psi | 87% | 2999 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 54,331 psi | 87% | 3081 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 86% | 54,723 psi | 88% | 3031 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 92% | 55,956 psi | 90% | 3035 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 84% | 53,925 psi | 86% | 2986 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 54,781 psi | 88% | 2963 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 54,781 psi | 88% | 3156 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 56,159 psi | 90% | 3058 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 52,982 psi | 85% | 3022 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 55,753 psi | 89% | 3146 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 94% | 53,592 psi | 86% | 3130 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,653 psi | 64% | 2851 fps | 98.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,686 psi | 72% | 3025 fps | 97.7% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 54,911 psi | 88% | 3048 fps | 99.5% |
| Bofors RP3 | <<locked>> | 90% | 53,011 psi | 85% | 3015 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 53,287 psi | 85% | 2982 fps | 96.5% |
| Hodgdon Benchmark | <<locked>> | 84% | 55,564 psi | 89% | 2969 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 53,316 psi | 85% | 3012 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 55,317 psi | 89% | 3117 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 90% | 54,085 psi | 87% | 3028 fps | 99% |
| Hodgdon H414 | <<locked>> | 96% | 53,867 psi | 86% | 3077 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 94% | 54,534 psi | 87% | 3041 fps | 96.1% |
| Hodgdon H4895 | <<locked>> | 86% | 55,288 psi | 89% | 3041 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 52,083 psi | 84% | 3015 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 55,013 psi | 88% | 3077 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 54,679 psi | 88% | 3117 fps | 97.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,389 psi | 57% | 1877 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 53,388 psi | 86% | 2995 fps | 99.9% |
| IMR 3031 | <<locked>> | 86% | 55,317 psi | 89% | 3028 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 55,506 psi | 89% | 3018 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 88% | 55,317 psi | 89% | 2992 fps | 97.4% |
| IMR 4350 | <<locked>> | 98% | 53,795 psi | 86% | 3009 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 94% | 55,245 psi | 89% | 3018 fps | 97.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 55,158 psi | 88% | 3077 fps | 99.5% |
| IMR 4895 | <<locked>> | 88% | 54,346 psi | 87% | 3054 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 84% | 53,925 psi | 86% | 2986 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 54,650 psi | 88% | 3009 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 54,317 psi | 87% | 2959 fps | 99.8% |
| Lovex S062 | <<locked>> | 90% | 55,071 psi | 88% | 3012 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 54,433 psi | 87% | 3009 fps | 98.5% |
| Lovex S070 | <<locked>> | 98% | 55,477 psi | 89% | 3045 fps | 97.7% |
| Norma 201 | <<locked>> | 86% | 53,519 psi | 86% | 2979 fps | 100% |
| Norma 202 | <<locked>> | 86% | 54,143 psi | 87% | 2982 fps | 100% |
| Norma 203B | <<locked>> | 90% | 55,724 psi | 89% | 3064 fps | 99.9% |
| Norma URP | <<locked>> | 98% | 53,606 psi | 86% | 3071 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 88% | 52,910 psi | 85% | 3035 fps | 99.7% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 56,246 psi | 90% | 3123 fps | 98.5% |
| Ramshot TAC | <<locked>> | 84% | 54,099 psi | 87% | 2999 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 84% | 53,693 psi | 86% | 3015 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 82% | 54,636 psi | 88% | 2982 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,708 psi | 57% | 1919 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 54,346 psi | 87% | 3009 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 53,519 psi | 86% | 3091 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 53,200 psi | 85% | 3127 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 54,404 psi | 87% | 3107 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 54,085 psi | 87% | 3136 fps | 99.1% |
| Rottweil R 901 | <<locked>> | 84% | 54,244 psi | 87% | 2959 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 53,838 psi | 86% | 2972 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 52,823 psi | 85% | 3005 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 94% | 53,287 psi | 85% | 2982 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 96% | 54,433 psi | 87% | 3009 fps | 98.5% |
| Shooters World Match Rifle | <<locked>> | 86% | 54,650 psi | 88% | 3009 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 55,071 psi | 88% | 3012 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 55,477 psi | 89% | 3045 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 54,998 psi | 88% | 3074 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 56,304 psi | 90% | 3035 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 53,374 psi | 86% | 3002 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,969 psi | 88% | 2917 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 55,288 psi | 89% | 2913 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 54,868 psi | 88% | 2959 fps | 97.4% |
| Somchem S321 | <<locked>> | 82% | 55,027 psi | 88% | 3015 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 54,462 psi | 87% | 2917 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 55,985 psi | 90% | 3025 fps | 99.9% |
| Somchem S355 | <<locked>> | 92% | 53,214 psi | 85% | 3005 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 51,488 psi | 83% | 3071 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 54,665 psi | 88% | 2881 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 55,288 psi | 89% | 2904 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 53,722 psi | 86% | 2940 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 54,810 psi | 88% | 2959 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 54,882 psi | 88% | 2989 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 56,101 psi | 90% | 3068 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 84% | 54,302 psi | 87% | 2982 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 53,026 psi | 85% | 2953 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 55,143 psi | 88% | 3071 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,729 psi | 70% | 2936 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 52,895 psi | 85% | 2992 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 54,418 psi | 87% | 3035 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 54,128 psi | 87% | 3084 fps | 97.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,549 psi | 57% | 2841 fps | 98.1% |
| Winchester StaBALL Match | <<locked>> | 86% | 53,258 psi | 85% | 3009 fps | 99.9% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 48,878 psi | 78% | 2831 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,234 psi | 66% | 2740 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,820 psi | 78% | 2910 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 50,067 psi | 80% | 2884 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 39,001 psi | 63% | 2730 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 35,331 psi | 57% | 2707 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 45,194 psi | 72% | 2861 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 80% | 38,421 psi | 62% | 2700 fps | 96.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,355 psi | 76% | 2874 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 47,776 psi | 77% | 2861 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,234 psi | 66% | 2887 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,971 psi | 61% | 2720 fps | 98.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,857 psi | 66% | 2789 fps | 97.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 35,679 psi | 57% | 2726 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 32,793 psi | 53% | 2674 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 94% | 32,808 psi | 53% | 2674 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 38,522 psi | 62% | 2877 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,585 psi | 71% | 2861 fps | 98% |
| Bofors RP3 | <<locked>> | 80% | 37,550 psi | 60% | 2720 fps | 98.2% |
| Bofors RP7 | <<locked>> | 90% | 46,949 psi | 75% | 2867 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,110 psi | 79% | 2864 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,282 psi | 74% | 2890 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 51,474 psi | 83% | 3051 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 80% | 38,435 psi | 62% | 2723 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 92% | 47,123 psi | 76% | 2956 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 92% | 51,097 psi | 82% | 2982 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 45,629 psi | 73% | 2874 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,632 psi | 49% | 2559 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,843 psi | 67% | 2841 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 92% | 47,108 psi | 76% | 2976 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,194 psi | 42% | 1677 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,801 psi | 70% | 2822 fps | 99% |
| IMR 3031 | <<locked>> | 80% | 45,310 psi | 73% | 2871 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,335 psi | 65% | 2736 fps | 97.6% |
| IMR 4166 Enduron | <<locked>> | 82% | 45,629 psi | 73% | 2815 fps | 95.3% |
| IMR 4350 | <<locked>> | 94% | 47,224 psi | 76% | 2894 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 45,803 psi | 73% | 2848 fps | 95.2% |
| IMR 4831 | <<locked>> | 88% | 36,709 psi | 59% | 2723 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 41,858 psi | 67% | 2822 fps | 98.4% |
| IMR 8208 XBR | <<locked>> | 80% | 47,355 psi | 76% | 2874 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 44,353 psi | 71% | 2838 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,165 psi | 72% | 2799 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 40,118 psi | 64% | 2740 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 39,871 psi | 64% | 2730 fps | 95.1% |
| Lovex S070 | <<locked>> | 92% | 45,788 psi | 73% | 2871 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 44,077 psi | 71% | 2812 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 44,541 psi | 71% | 2822 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,190 psi | 64% | 2776 fps | 98% |
| Norma URP | <<locked>> | 86% | 35,824 psi | 57% | 2713 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 39,929 psi | 64% | 2789 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 92% | 42,946 psi | 69% | 2877 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 47,253 psi | 76% | 2874 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,934 psi | 75% | 2897 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,068 psi | 82% | 2923 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,571 psi | 43% | 1719 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 44,527 psi | 71% | 2828 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,250 psi | 69% | 2900 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,954 psi | 56% | 2749 fps | 99.1% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 37,898 psi | 61% | 2789 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 40,843 psi | 65% | 2867 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 47,805 psi | 77% | 2854 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,887 psi | 67% | 2759 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 80% | 35,259 psi | 57% | 2657 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 90% | 46,949 psi | 75% | 2867 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 86% | 39,871 psi | 64% | 2730 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,353 psi | 71% | 2838 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,118 psi | 64% | 2740 fps | 99% |
| Shooters World SW4350 | <<locked>> | 92% | 45,788 psi | 73% | 2871 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,448 psi | 58% | 2713 fps | 96.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,484 psi | 73% | 2848 fps | 97.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,743 psi | 70% | 2828 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,527 psi | 73% | 2766 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,884 psi | 61% | 2621 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 44,788 psi | 72% | 2785 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 51,329 psi | 82% | 2956 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,107 psi | 72% | 2766 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,382 psi | 73% | 2848 fps | 98.9% |
| Somchem S355 | <<locked>> | 80% | 36,129 psi | 58% | 2667 fps | 97.3% |
| Somchem S365 | <<locked>> | 82% | 27,963 psi | 45% | 2536 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 51,445 psi | 82% | 2831 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,948 psi | 74% | 2762 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,539 psi | 67% | 2743 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,206 psi | 68% | 2753 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,403 psi | 55% | 2602 fps | 98.1% |
| Vihtavuori N160 | <<locked>> | 86% | 37,405 psi | 60% | 2717 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 47,471 psi | 76% | 2871 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 40,654 psi | 65% | 2736 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 36,840 psi | 59% | 2713 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 92% | 33,243 psi | 53% | 2694 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,516 psi | 49% | 2513 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 47,384 psi | 76% | 2917 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 47,123 psi | 76% | 2956 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 96% | 30,980 psi | 50% | 2694 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,265 psi | 69% | 2831 fps | 99% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 112 powders for .300 H&H Mag. loaded with the .308 | 150gr | Nosler Expansion Tip. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,156 fps; across all powders the maximum-charge window runs from 1,877 fps to 3,156 fps. Accurate 3100 gives the best case fill at 100 %, and 112 of the 112 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, 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. As outliers, Accurate High Country, 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.