Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 138gr | Hammer HHT 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% | 55,767 psi | 89% | 3084 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 54,491 psi | 87% | 3104 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 52,939 psi | 85% | 3123 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 54,186 psi | 87% | 3100 fps | 96.2% |
| Accurate 4064 | <<locked>> | 90% | 54,781 psi | 88% | 3156 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 55,114 psi | 88% | 3238 fps | 99.3% |
| ADI AR 2206H | <<locked>> | 86% | 55,201 psi | 89% | 3192 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 90% | 52,997 psi | 85% | 3133 fps | 99.3% |
| ADI Benchmark 8208 | <<locked>> | 84% | 54,331 psi | 87% | 3143 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 55,085 psi | 88% | 3120 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 55,434 psi | 89% | 3320 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 52,997 psi | 85% | 3156 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 88% | 53,490 psi | 86% | 3179 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 98% | 52,852 psi | 85% | 3245 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 94% | 54,244 psi | 87% | 3287 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,205 psi | 64% | 2995 fps | 98.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,527 psi | 73% | 3179 fps | 97.7% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 55,405 psi | 89% | 3205 fps | 99.4% |
| Bofors RP3 | <<locked>> | 90% | 53,461 psi | 86% | 3169 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 53,795 psi | 86% | 3136 fps | 96.4% |
| Hodgdon Benchmark | <<locked>> | 84% | 55,854 psi | 90% | 3127 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 53,693 psi | 86% | 3166 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 55,956 psi | 90% | 3278 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 90% | 54,665 psi | 88% | 3186 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 96% | 54,491 psi | 87% | 3235 fps | 97.2% |
| Hodgdon H4350 | <<locked>> | 94% | 54,969 psi | 88% | 3196 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 86% | 55,767 psi | 89% | 3202 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 52,692 psi | 84% | 3169 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 55,593 psi | 89% | 3235 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 55,376 psi | 89% | 3274 fps | 97% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,317 psi | 57% | 1991 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 53,606 psi | 86% | 3150 fps | 99.9% |
| IMR 3031 | <<locked>> | 86% | 55,956 psi | 90% | 3189 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 55,796 psi | 89% | 3173 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 88% | 55,912 psi | 90% | 3153 fps | 97.3% |
| IMR 4350 | <<locked>> | 98% | 54,418 psi | 87% | 3166 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 94% | 55,695 psi | 89% | 3173 fps | 97.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 55,709 psi | 89% | 3228 fps | 99.4% |
| IMR 4895 | <<locked>> | 88% | 54,882 psi | 88% | 3215 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 84% | 54,331 psi | 87% | 3143 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 55,158 psi | 88% | 3166 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 54,723 psi | 88% | 3117 fps | 99.8% |
| Lovex S062 | <<locked>> | 90% | 55,651 psi | 89% | 3169 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 55,013 psi | 88% | 3163 fps | 98.3% |
| Lovex S070 | <<locked>> | 98% | 56,231 psi | 90% | 3202 fps | 97.6% |
| Norma 201 | <<locked>> | 86% | 53,954 psi | 87% | 3133 fps | 100% |
| Norma 202 | <<locked>> | 86% | 54,549 psi | 87% | 3136 fps | 100% |
| Norma 203B | <<locked>> | 90% | 56,275 psi | 90% | 3222 fps | 99.9% |
| Norma URP | <<locked>> | 98% | 54,404 psi | 87% | 3228 fps | 99.2% |
| Ramshot Big Game | <<locked>> | 88% | 53,548 psi | 86% | 3189 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 98% | 53,185 psi | 85% | 3219 fps | 97.8% |
| Ramshot TAC | <<locked>> | 84% | 54,534 psi | 87% | 3153 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 84% | 54,230 psi | 87% | 3173 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 82% | 55,143 psi | 88% | 3140 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,795 psi | 57% | 2041 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 54,926 psi | 88% | 3163 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 53,983 psi | 87% | 3248 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 53,780 psi | 86% | 3287 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 55,158 psi | 88% | 3261 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 54,781 psi | 88% | 3294 fps | 99% |
| Rottweil R 901 | <<locked>> | 84% | 54,418 psi | 87% | 3114 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 54,433 psi | 87% | 3133 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 53,301 psi | 85% | 3159 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 94% | 53,795 psi | 86% | 3136 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 96% | 55,013 psi | 88% | 3163 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 86% | 55,158 psi | 88% | 3166 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 55,651 psi | 89% | 3169 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 56,231 psi | 90% | 3202 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 55,492 psi | 89% | 3232 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 52,968 psi | 85% | 3127 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 53,751 psi | 86% | 3156 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 55,448 psi | 89% | 3074 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 55,927 psi | 90% | 3071 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 55,405 psi | 89% | 3114 fps | 97.2% |
| Somchem S321 | <<locked>> | 82% | 55,506 psi | 89% | 3173 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 54,868 psi | 88% | 3068 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 52,678 psi | 84% | 3120 fps | 99.6% |
| Somchem S355 | <<locked>> | 92% | 53,766 psi | 86% | 3163 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 52,301 psi | 84% | 3228 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 55,071 psi | 88% | 3035 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 55,782 psi | 89% | 3061 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 54,288 psi | 87% | 3097 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 55,158 psi | 88% | 3114 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 55,376 psi | 89% | 3143 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 53,301 psi | 85% | 3169 fps | 99% |
| Vihtavuori N530 | <<locked>> | 84% | 54,636 psi | 88% | 3140 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 53,316 psi | 85% | 3104 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 55,869 psi | 90% | 3228 fps | 99.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,382 psi | 71% | 3084 fps | 98.2% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 53,664 psi | 86% | 3146 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 54,955 psi | 88% | 3192 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 54,723 psi | 88% | 3241 fps | 97.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,100 psi | 58% | 2989 fps | 98% |
| Winchester StaBALL Match | <<locked>> | 86% | 53,751 psi | 86% | 3163 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% | 49,211 psi | 79% | 2982 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,582 psi | 67% | 2884 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 49,284 psi | 79% | 3061 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 50,560 psi | 81% | 3035 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 39,320 psi | 63% | 2874 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 38,508 psi | 62% | 2910 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 45,556 psi | 73% | 3012 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 80% | 38,566 psi | 62% | 2838 fps | 96.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,659 psi | 76% | 3025 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 48,008 psi | 77% | 3012 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,684 psi | 67% | 3038 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,247 psi | 61% | 2861 fps | 98% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,162 psi | 66% | 2933 fps | 97.4% |
| Alliant Reloder-16 | <<locked>> | 86% | 36,013 psi | 58% | 2864 fps | 95% |
| Alliant Reloder-17 | 62.3 gr | 80% | 33,083 psi | 53% | 2812 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 94% | 33,199 psi | 53% | 2808 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 39,218 psi | 63% | 3025 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,991 psi | 72% | 3012 fps | 97.8% |
| Bofors RP3 | <<locked>> | 80% | 37,826 psi | 61% | 2861 fps | 98% |
| Bofors RP7 | <<locked>> | 92% | 50,343 psi | 81% | 3074 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,342 psi | 79% | 3015 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,818 psi | 75% | 3045 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 51,866 psi | 83% | 3209 fps | 99.3% |
| Hodgdon H380 | <<locked>> | 80% | 38,827 psi | 62% | 2864 fps | 95.3% |
| Hodgdon H414 | 70.1 gr | 92% | 47,616 psi | 76% | 3107 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 92% | 51,503 psi | 83% | 3133 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 45,977 psi | 74% | 3025 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 33,040 psi | 53% | 2749 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,047 psi | 67% | 2986 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 92% | 47,718 psi | 77% | 3127 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,223 psi | 42% | 1785 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,135 psi | 71% | 2969 fps | 98.9% |
| IMR 3031 | <<locked>> | 80% | 45,730 psi | 73% | 3022 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,480 psi | 65% | 2877 fps | 97.3% |
| IMR 4166 Enduron | <<locked>> | 82% | 46,079 psi | 74% | 2966 fps | 95% |
| IMR 4350 | <<locked>> | 96% | 51,010 psi | 82% | 3104 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 90% | 49,182 psi | 79% | 3054 fps | 95.8% |
| IMR 4831 | <<locked>> | 88% | 37,188 psi | 60% | 2861 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 42,192 psi | 68% | 2969 fps | 98.2% |
| IMR 8208 XBR | <<locked>> | 80% | 47,659 psi | 76% | 3025 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 80% | 44,759 psi | 72% | 2986 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,484 psi | 73% | 2946 fps | 98.8% |
| Lovex S062 | <<locked>> | 80% | 40,437 psi | 65% | 2881 fps | 98.8% |
| Lovex S065 | <<locked>> | 88% | 42,757 psi | 69% | 2927 fps | 95.6% |
| Lovex S070 | <<locked>> | 92% | 46,180 psi | 74% | 3015 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 44,382 psi | 71% | 2956 fps | 99.4% |
| Norma 202 | <<locked>> | 80% | 44,831 psi | 72% | 2969 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,553 psi | 65% | 2920 fps | 97.8% |
| Norma URP | <<locked>> | 88% | 38,740 psi | 62% | 2913 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 40,393 psi | 65% | 2933 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 92% | 43,337 psi | 69% | 3022 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 47,630 psi | 76% | 3022 fps | 97.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,413 psi | 76% | 3048 fps | 99% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,561 psi | 83% | 3077 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,542 psi | 43% | 1827 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 45,005 psi | 72% | 2976 fps | 95.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,584 psi | 70% | 3048 fps | 97.9% |
| ReloadSwiss RS 60 | 62.3 gr | 80% | 35,302 psi | 57% | 2890 fps | 98.9% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 38,377 psi | 62% | 2930 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 41,307 psi | 66% | 3012 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 48,167 psi | 77% | 3009 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,264 psi | 68% | 2904 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 80% | 35,462 psi | 57% | 2792 fps | 97% |
| Rottweil R 907 | <<locked>> | 92% | 50,343 psi | 81% | 3074 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 88% | 42,757 psi | 69% | 2927 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,759 psi | 72% | 2986 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,437 psi | 65% | 2881 fps | 98.8% |
| Shooters World SW4350 | <<locked>> | 92% | 46,180 psi | 74% | 3015 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,753 psi | 59% | 2851 fps | 96.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,919 psi | 74% | 2995 fps | 97.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,063 psi | 71% | 2972 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,876 psi | 74% | 2917 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,174 psi | 61% | 2762 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 48,414 psi | 78% | 2989 fps | 95.8% |
| Somchem S321 | <<locked>> | 80% | 51,779 psi | 83% | 3110 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,397 psi | 73% | 2913 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,788 psi | 73% | 2992 fps | 98.8% |
| Somchem S355 | <<locked>> | 80% | 36,419 psi | 58% | 2805 fps | 97.1% |
| Somchem S365 | <<locked>> | 84% | 30,124 psi | 48% | 2723 fps | 96.1% |
| Vihtavuori N130 | <<locked>> | 80% | 51,779 psi | 83% | 2989 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,282 psi | 74% | 2910 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,901 psi | 67% | 2890 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,424 psi | 68% | 2894 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,606 psi | 55% | 2736 fps | 97.9% |
| Vihtavuori N160 | <<locked>> | 86% | 37,811 psi | 61% | 2854 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 47,732 psi | 77% | 3018 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 41,017 psi | 66% | 2881 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 39,871 psi | 64% | 2917 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 94% | 36,013 psi | 58% | 2890 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 33,011 psi | 53% | 2710 fps | 96% |
| Winchester 748 | <<locked>> | 80% | 47,805 psi | 77% | 3071 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 47,616 psi | 76% | 3107 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 96% | 31,473 psi | 50% | 2828 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,671 psi | 70% | 2976 fps | 98.9% |
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 111 powders for .300 Win. Mag. loaded with the .308 | 138gr | Hammer HHT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,320 fps; across all powders the maximum-charge window runs from 1,991 fps to 3,320 fps. Accurate 3100 gives the best case fill at 100 %, and 111 of the 111 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 138.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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 Win. Mag. with the .308 | 138gr | Hammer HHT 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.