Load Specifications
Bullet:.308 | 150gr | Barnes TSX BT
Bullet Manufacturer:Barnes
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:1:12.5
Load data in caliber .300 H&H Mag. with .308 | 150gr | Barnes TSX BT 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% | 56,188 psi | 90% | 2943 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 54,752 psi | 88% | 2963 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 53,258 psi | 85% | 2982 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 54,273 psi | 87% | 2963 fps | 96.6% |
| Accurate 4064 | <<locked>> | 90% | 55,042 psi | 88% | 3015 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 55,274 psi | 89% | 3097 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 86% | 55,434 psi | 89% | 3048 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 90% | 53,330 psi | 86% | 2995 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 84% | 54,389 psi | 87% | 2999 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 55,405 psi | 89% | 2972 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 55,724 psi | 89% | 3179 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 53,243 psi | 85% | 3018 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 53,679 psi | 86% | 3038 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 98% | 53,243 psi | 85% | 3107 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 94% | 54,418 psi | 87% | 3146 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,306 psi | 65% | 2867 fps | 98.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,556 psi | 73% | 3045 fps | 98% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 55,521 psi | 89% | 3061 fps | 99.6% |
| Bofors RP3 | <<locked>> | 90% | 53,693 psi | 86% | 3031 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 53,867 psi | 86% | 2999 fps | 96.7% |
| Hodgdon Benchmark | <<locked>> | 84% | 55,999 psi | 90% | 2979 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 53,998 psi | 87% | 3025 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 56,057 psi | 90% | 3130 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 90% | 54,737 psi | 88% | 3045 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 96% | 54,723 psi | 88% | 3097 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 94% | 55,347 psi | 89% | 3061 fps | 96.3% |
| Hodgdon H4895 | <<locked>> | 86% | 56,014 psi | 90% | 3058 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 52,982 psi | 85% | 3031 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 55,941 psi | 90% | 3097 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 55,593 psi | 89% | 3140 fps | 97.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,418 psi | 57% | 1883 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 53,838 psi | 86% | 3009 fps | 99.9% |
| IMR 3031 | <<locked>> | 86% | 56,188 psi | 90% | 3045 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 56,173 psi | 90% | 3031 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 88% | 55,927 psi | 90% | 3009 fps | 97.7% |
| IMR 4350 | <<locked>> | 98% | 54,549 psi | 87% | 3028 fps | 96.9% |
| IMR 4451 Enduron | <<locked>> | 94% | 56,057 psi | 90% | 3038 fps | 97.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 55,999 psi | 90% | 3091 fps | 99.6% |
| IMR 4895 | <<locked>> | 88% | 55,056 psi | 88% | 3071 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 84% | 54,389 psi | 87% | 2999 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 55,434 psi | 89% | 3022 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 54,955 psi | 88% | 2976 fps | 99.9% |
| Lovex S062 | <<locked>> | 90% | 55,825 psi | 90% | 3025 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 55,288 psi | 89% | 3025 fps | 98.6% |
| Lovex S070 | <<locked>> | 98% | 56,289 psi | 90% | 3061 fps | 98% |
| Norma 201 | <<locked>> | 86% | 54,012 psi | 87% | 2989 fps | 100% |
| Norma 202 | <<locked>> | 86% | 54,897 psi | 88% | 2995 fps | 100% |
| Norma 203B | <<locked>> | 90% | 56,434 psi | 90% | 3081 fps | 100% |
| Norma URP | <<locked>> | 98% | 54,491 psi | 87% | 3087 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 88% | 53,751 psi | 86% | 3051 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 98% | 53,388 psi | 86% | 3081 fps | 98.1% |
| Ramshot TAC | <<locked>> | 84% | 54,679 psi | 88% | 3012 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 84% | 54,563 psi | 87% | 3035 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 82% | 55,259 psi | 89% | 2999 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,955 psi | 58% | 1929 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 55,158 psi | 88% | 3025 fps | 98.1% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 54,302 psi | 87% | 3107 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 54,056 psi | 87% | 3143 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 55,259 psi | 89% | 3123 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 54,824 psi | 88% | 3153 fps | 99.2% |
| Rottweil R 901 | <<locked>> | 84% | 54,810 psi | 88% | 2972 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 54,520 psi | 87% | 2989 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 53,534 psi | 86% | 3022 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 53,867 psi | 86% | 2999 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 96% | 55,288 psi | 89% | 3025 fps | 98.6% |
| Shooters World Match Rifle | <<locked>> | 86% | 55,434 psi | 89% | 3022 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 55,825 psi | 90% | 3025 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 56,289 psi | 90% | 3061 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 55,579 psi | 89% | 3087 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 53,098 psi | 85% | 2989 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 54,012 psi | 87% | 3018 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 55,709 psi | 89% | 2933 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 55,970 psi | 90% | 2927 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 55,579 psi | 89% | 2979 fps | 97.6% |
| Somchem S321 | <<locked>> | 82% | 55,695 psi | 89% | 3028 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 54,926 psi | 88% | 2927 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 52,823 psi | 85% | 2982 fps | 99.7% |
| Somchem S355 | <<locked>> | 92% | 53,911 psi | 86% | 3018 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 52,649 psi | 84% | 3091 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 55,201 psi | 89% | 2890 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 56,072 psi | 90% | 2917 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 54,563 psi | 87% | 2956 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 55,506 psi | 89% | 2972 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 55,521 psi | 89% | 3002 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 53,287 psi | 85% | 3028 fps | 99.2% |
| Vihtavuori N530 | <<locked>> | 84% | 55,027 psi | 88% | 2999 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 53,650 psi | 86% | 2966 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 55,956 psi | 90% | 3091 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,556 psi | 71% | 2956 fps | 98.6% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 53,809 psi | 86% | 3012 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 55,143 psi | 88% | 3048 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 54,969 psi | 88% | 3100 fps | 97.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,042 psi | 58% | 2864 fps | 98.4% |
| Winchester StaBALL Match | <<locked>> | 86% | 53,925 psi | 86% | 3025 fps | 100% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 49,516 psi | 79% | 2844 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,800 psi | 67% | 2753 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 49,574 psi | 79% | 2923 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 47,500 psi | 76% | 2844 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 39,566 psi | 63% | 2746 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 35,998 psi | 58% | 2723 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 45,672 psi | 73% | 2874 fps | 99% |
| ADI AR 2208 | <<locked>> | 80% | 38,870 psi | 62% | 2713 fps | 97% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,834 psi | 77% | 2887 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 48,457 psi | 78% | 2874 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,858 psi | 67% | 2907 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,479 psi | 62% | 2733 fps | 98.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,321 psi | 66% | 2802 fps | 97.8% |
| Alliant Reloder-16 | <<locked>> | 86% | 36,230 psi | 58% | 2743 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 33,301 psi | 53% | 2694 fps | 96.3% |
| Alliant Reloder-23 | <<locked>> | 92% | 31,169 psi | 50% | 2628 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 96% | 39,305 psi | 63% | 2904 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,208 psi | 72% | 2881 fps | 98.2% |
| Bofors RP3 | <<locked>> | 80% | 38,014 psi | 61% | 2733 fps | 98.4% |
| Bofors RP7 | <<locked>> | 90% | 47,529 psi | 76% | 2884 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,574 psi | 79% | 2877 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,963 psi | 75% | 2907 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 52,228 psi | 84% | 3068 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 80% | 39,088 psi | 63% | 2740 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 90% | 44,599 psi | 72% | 2910 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 92% | 51,663 psi | 83% | 2999 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 46,151 psi | 74% | 2887 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 31,024 psi | 50% | 2572 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,337 psi | 68% | 2854 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 92% | 47,979 psi | 77% | 2999 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,339 psi | 42% | 1686 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,469 psi | 71% | 2841 fps | 99.2% |
| IMR 3031 | <<locked>> | 80% | 46,166 psi | 74% | 2887 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,814 psi | 65% | 2753 fps | 97.8% |
| IMR 4166 Enduron | <<locked>> | 82% | 46,224 psi | 74% | 2835 fps | 95.6% |
| IMR 4350 | <<locked>> | 94% | 47,950 psi | 77% | 2910 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 88% | 46,369 psi | 74% | 2864 fps | 95.5% |
| IMR 4831 | <<locked>> | 86% | 34,867 psi | 56% | 2677 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 42,366 psi | 68% | 2835 fps | 98.5% |
| IMR 8208 XBR | <<locked>> | 80% | 47,834 psi | 77% | 2887 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 44,889 psi | 72% | 2851 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,629 psi | 73% | 2812 fps | 99.1% |
| Lovex S062 | <<locked>> | 80% | 40,640 psi | 65% | 2753 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 40,263 psi | 65% | 2743 fps | 95.3% |
| Lovex S070 | <<locked>> | 90% | 43,642 psi | 70% | 2831 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 44,614 psi | 72% | 2825 fps | 99.6% |
| Norma 202 | <<locked>> | 80% | 45,078 psi | 72% | 2835 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,669 psi | 65% | 2789 fps | 98.2% |
| Norma URP | <<locked>> | 86% | 36,419 psi | 58% | 2730 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 40,582 psi | 65% | 2805 fps | 98% |
| Ramshot Hunter | <<locked>> | 92% | 43,468 psi | 70% | 2894 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 47,848 psi | 77% | 2890 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,601 psi | 76% | 2913 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,721 psi | 83% | 2940 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,542 psi | 43% | 1722 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 42,322 psi | 68% | 2789 fps | 95.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,990 psi | 71% | 2920 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,534 psi | 57% | 2766 fps | 99.3% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 35,940 psi | 58% | 2743 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 38,667 psi | 62% | 2818 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 48,370 psi | 78% | 2867 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,380 psi | 68% | 2772 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 35,737 psi | 57% | 2674 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 90% | 47,529 psi | 76% | 2884 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 86% | 40,263 psi | 65% | 2743 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,889 psi | 72% | 2851 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,640 psi | 65% | 2753 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 90% | 43,642 psi | 70% | 2831 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,057 psi | 59% | 2730 fps | 97.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,137 psi | 74% | 2861 fps | 97.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,425 psi | 71% | 2844 fps | 98.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,050 psi | 74% | 2779 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,363 psi | 62% | 2635 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 45,571 psi | 73% | 2802 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 52,011 psi | 83% | 2972 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,600 psi | 73% | 2779 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,021 psi | 74% | 2861 fps | 99% |
| Somchem S355 | <<locked>> | 80% | 36,608 psi | 59% | 2684 fps | 97.5% |
| Somchem S365 | <<locked>> | 82% | 28,311 psi | 45% | 2546 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 52,011 psi | 83% | 2844 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,485 psi | 75% | 2772 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,119 psi | 68% | 2756 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,699 psi | 68% | 2766 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,853 psi | 56% | 2615 fps | 98.3% |
| Vihtavuori N160 | <<locked>> | 84% | 35,505 psi | 57% | 2674 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 47,950 psi | 77% | 2881 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 41,292 psi | 66% | 2753 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 37,550 psi | 60% | 2733 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 92% | 33,837 psi | 54% | 2713 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,951 psi | 50% | 2530 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 48,080 psi | 77% | 2933 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 44,817 psi | 72% | 2913 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 96% | 31,473 psi | 50% | 2717 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,932 psi | 70% | 2848 fps | 99.2% |
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 | Barnes TSX BT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,179 fps; across all powders the maximum-charge window runs from 1,883 fps to 3,179 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 56–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:12.5 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.