Load Specifications
Load data in caliber 5.6 x 57 with .224 | 69gr | Sierra MatchKing 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 70, ReloadSwiss RS 60 and Alliant Reloder-17.
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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 57,740 psi | 90% | 3205 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 57,232 psi | 90% | 3228 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 54,795 psi | 86% | 3238 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 56,130 psi | 88% | 3219 fps | 96.4% |
| Accurate 4064 | <<locked>> | 90% | 57,261 psi | 90% | 3278 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 53,969 psi | 85% | 3304 fps | 99% |
| ADI AR 2206H | <<locked>> | 86% | 56,855 psi | 89% | 3307 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 90% | 54,708 psi | 86% | 3251 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 84% | 55,825 psi | 87% | 3255 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 57,145 psi | 90% | 3235 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 57,087 psi | 89% | 3438 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 57,667 psi | 90% | 3323 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 54,998 psi | 86% | 3278 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 55,550 psi | 87% | 3301 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 98% | 55,056 psi | 86% | 3373 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 94% | 56,536 psi | 89% | 3412 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,047 psi | 66% | 3114 fps | 98.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,703 psi | 75% | 3304 fps | 98% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 57,464 psi | 90% | 3327 fps | 99.5% |
| Bofors RP3 | <<locked>> | 90% | 55,782 psi | 87% | 3294 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 55,492 psi | 87% | 3251 fps | 96.5% |
| Hodgdon Benchmark | <<locked>> | 84% | 57,464 psi | 90% | 3241 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 55,753 psi | 87% | 3284 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 56,550 psi | 89% | 3304 fps | 99% |
| Hodgdon H414 | <<locked>> | 96% | 56,594 psi | 89% | 3356 fps | 97.4% |
| Hodgdon H4350 | <<locked>> | 94% | 57,000 psi | 89% | 3317 fps | 96.1% |
| Hodgdon H4895 | <<locked>> | 86% | 57,493 psi | 90% | 3320 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 54,897 psi | 86% | 3287 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 57,696 psi | 90% | 3356 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 57,667 psi | 90% | 3399 fps | 97.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,505 psi | 56% | 2070 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 55,187 psi | 86% | 3264 fps | 99.9% |
| IMR 3031 | <<locked>> | 86% | 57,609 psi | 90% | 3304 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 57,609 psi | 90% | 3291 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 88% | 57,319 psi | 90% | 3264 fps | 97.4% |
| IMR 4350 | <<locked>> | 98% | 56,231 psi | 88% | 3281 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 94% | 57,551 psi | 90% | 3294 fps | 97.4% |
| IMR 4831 | <<locked>> | 98% | 54,259 psi | 85% | 3291 fps | 99.1% |
| IMR 4895 | <<locked>> | 88% | 57,000 psi | 89% | 3337 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 84% | 55,825 psi | 87% | 3255 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 57,130 psi | 90% | 3284 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 56,362 psi | 88% | 3232 fps | 99.8% |
| Lovex S062 | <<locked>> | 90% | 57,638 psi | 90% | 3291 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 56,985 psi | 89% | 3284 fps | 98.5% |
| Lovex S070 | <<locked>> | 96% | 54,476 psi | 85% | 3258 fps | 97.1% |
| Norma 201 | <<locked>> | 86% | 55,883 psi | 88% | 3255 fps | 100% |
| Norma 202 | <<locked>> | 86% | 56,507 psi | 89% | 3258 fps | 100% |
| Norma 203B | <<locked>> | 88% | 54,781 psi | 86% | 3284 fps | 99.7% |
| Norma URP | <<locked>> | 98% | 56,608 psi | 89% | 3350 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 88% | 55,230 psi | 87% | 3307 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 98% | 55,245 psi | 87% | 3337 fps | 98% |
| Ramshot TAC | <<locked>> | 84% | 56,159 psi | 88% | 3268 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 84% | 56,086 psi | 88% | 3294 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 82% | 56,826 psi | 89% | 3255 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,114 psi | 57% | 2119 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 56,855 psi | 89% | 3284 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 55,999 psi | 88% | 3373 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 55,999 psi | 88% | 3412 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 57,450 psi | 90% | 3386 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 56,695 psi | 89% | 3415 fps | 99.1% |
| Rottweil R 901 | <<locked>> | 84% | 56,608 psi | 89% | 3238 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 56,463 psi | 88% | 3251 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 55,579 psi | 87% | 3281 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 94% | 55,492 psi | 87% | 3251 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 96% | 56,985 psi | 89% | 3284 fps | 98.5% |
| Shooters World Match Rifle | <<locked>> | 86% | 57,130 psi | 90% | 3284 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 57,638 psi | 90% | 3291 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 54,476 psi | 85% | 3258 fps | 97.1% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 57,696 psi | 90% | 3353 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 54,708 psi | 86% | 3241 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 55,550 psi | 87% | 3274 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 56,956 psi | 89% | 3189 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 57,740 psi | 90% | 3186 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 57,609 psi | 90% | 3232 fps | 97.4% |
| Somchem S321 | <<locked>> | 82% | 57,522 psi | 90% | 3294 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 56,637 psi | 89% | 3182 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 54,621 psi | 86% | 3238 fps | 99.7% |
| Somchem S355 | <<locked>> | 92% | 55,796 psi | 87% | 3281 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 54,694 psi | 86% | 3353 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 56,724 psi | 89% | 3150 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 57,232 psi | 90% | 3169 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 56,188 psi | 88% | 3215 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 57,116 psi | 90% | 3232 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 57,276 psi | 90% | 3258 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 55,376 psi | 87% | 3287 fps | 99.1% |
| Vihtavuori N530 | <<locked>> | 84% | 56,463 psi | 88% | 3258 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 55,405 psi | 87% | 3222 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 54,215 psi | 85% | 3284 fps | 98.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,615 psi | 73% | 3205 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 55,651 psi | 87% | 3261 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 56,565 psi | 89% | 3307 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 57,014 psi | 89% | 3363 fps | 97.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,985 psi | 60% | 3117 fps | 98.4% |
| Winchester StaBALL Match | <<locked>> | 86% | 55,724 psi | 87% | 3284 fps | 99.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 50,850 psi | 80% | 3097 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 43,700 psi | 68% | 3005 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 51,416 psi | 81% | 3182 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 52,359 psi | 82% | 3153 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 41,307 psi | 65% | 2992 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 37,753 psi | 59% | 2966 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 47,239 psi | 74% | 3127 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 80% | 40,045 psi | 63% | 2949 fps | 96.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,313 psi | 77% | 3140 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 49,966 psi | 78% | 3130 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,149 psi | 68% | 3153 fps | 97.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 47,892 psi | 75% | 3146 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,798 psi | 62% | 2972 fps | 98.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,902 psi | 67% | 3051 fps | 97.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 37,376 psi | 59% | 2979 fps | 95.2% |
| Alliant Reloder-17 | 34.7 gr | 80% | 34,650 psi | 54% | 2927 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 92% | 32,692 psi | 51% | 2861 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 96% | 41,466 psi | 65% | 3156 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 46,717 psi | 73% | 3127 fps | 98% |
| Bofors RP3 | <<locked>> | 80% | 39,682 psi | 62% | 2979 fps | 98.2% |
| Bofors RP7 | <<locked>> | 92% | 52,156 psi | 82% | 3189 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,879 psi | 80% | 3130 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,457 psi | 76% | 3159 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 80% | 40,524 psi | 64% | 2982 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 92% | 49,414 psi | 77% | 3222 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 92% | 53,185 psi | 83% | 3248 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 47,747 psi | 75% | 3143 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 32,401 psi | 51% | 2802 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 43,685 psi | 68% | 3100 fps | 99% |
| Hodgdon Superformance | <<locked>> | 92% | 49,908 psi | 78% | 3251 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,368 psi | 41% | 1854 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,774 psi | 72% | 3087 fps | 99% |
| IMR 3031 | <<locked>> | 80% | 47,659 psi | 75% | 3143 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,018 psi | 66% | 2992 fps | 97.5% |
| IMR 4166 Enduron | <<locked>> | 82% | 47,384 psi | 74% | 3074 fps | 95.2% |
| IMR 4350 | <<locked>> | 94% | 49,313 psi | 77% | 3153 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 47,587 psi | 75% | 3104 fps | 95.1% |
| IMR 4831 | <<locked>> | 88% | 38,914 psi | 61% | 2976 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 43,961 psi | 69% | 3087 fps | 98.3% |
| IMR 8208 XBR | <<locked>> | 80% | 49,313 psi | 77% | 3140 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 80% | 46,775 psi | 73% | 3107 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,905 psi | 74% | 3058 fps | 98.9% |
| Lovex S062 | <<locked>> | 80% | 42,163 psi | 66% | 2999 fps | 98.9% |
| Lovex S065 | <<locked>> | 86% | 41,901 psi | 66% | 2986 fps | 95.1% |
| Lovex S070 | <<locked>> | 92% | 48,109 psi | 75% | 3136 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 45,992 psi | 72% | 3071 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 46,427 psi | 73% | 3084 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,293 psi | 66% | 3038 fps | 98% |
| Norma URP | <<locked>> | 86% | 38,014 psi | 60% | 2969 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 41,887 psi | 66% | 3045 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 92% | 45,353 psi | 71% | 3143 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 49,472 psi | 78% | 3143 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 48,863 psi | 77% | 3159 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 53,171 psi | 83% | 3192 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,992 psi | 42% | 1903 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 46,572 psi | 73% | 3091 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 45,266 psi | 71% | 3163 fps | 98% |
| ReloadSwiss RS 60 | 34.7 gr | 80% | 36,869 psi | 58% | 3009 fps | 99.1% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 40,364 psi | 63% | 3048 fps | 95.8% |
| ReloadSwiss RS 70 | 39.6 gr | 90% | 42,902 psi | 67% | 3127 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 50,053 psi | 78% | 3127 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 43,947 psi | 69% | 3022 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 80% | 37,318 psi | 58% | 2913 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 92% | 52,156 psi | 82% | 3189 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 41,901 psi | 66% | 2986 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 46,775 psi | 73% | 3107 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,163 psi | 66% | 2999 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 92% | 48,109 psi | 75% | 3136 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,232 psi | 60% | 2963 fps | 96.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 47,877 psi | 75% | 3114 fps | 97.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,498 psi | 71% | 3084 fps | 98.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,384 psi | 74% | 3028 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,624 psi | 62% | 2867 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 47,181 psi | 74% | 3045 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 53,664 psi | 84% | 3228 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 46,833 psi | 73% | 3022 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,558 psi | 75% | 3107 fps | 98.9% |
| Somchem S355 | <<locked>> | 80% | 37,942 psi | 59% | 2920 fps | 97.3% |
| Somchem S365 | <<locked>> | 82% | 29,675 psi | 47% | 2776 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 53,330 psi | 84% | 3100 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 47,761 psi | 75% | 3022 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,613 psi | 68% | 3005 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,048 psi | 69% | 3009 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,245 psi | 57% | 2848 fps | 98.1% |
| Vihtavuori N160 | <<locked>> | 86% | 39,436 psi | 62% | 2969 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 49,327 psi | 77% | 3133 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 42,627 psi | 67% | 2992 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 38,972 psi | 61% | 2969 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 92% | 35,650 psi | 56% | 2953 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,227 psi | 51% | 2753 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 49,414 psi | 77% | 3182 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 49,821 psi | 78% | 3232 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 96% | 33,243 psi | 52% | 2959 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,498 psi | 71% | 3094 fps | 99% |
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 112 powders for 5.6 x 57 loaded with the .224 | 69gr | Sierra MatchKing. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,438 fps; across all powders the maximum-charge window runs from 2,070 fps to 3,438 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 (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 69.0 gr projectile in 0.224" calls for a 1:10.0 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. ReloadSwiss RS 70, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for 5.6 x 57 with the .224 | 69gr | Sierra MatchKing they combine a high case fill with complete burn and sit in the upper velocity band. 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.