Load Specifications
Load data in caliber 6 mm XC with .243 | 85gr | Barnes XLC BT 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 Power Pro 2000-MR, Alliant Reloder-17 and ReloadSwiss RS 60.
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% | 57,246 psi | 90% | 3107 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 57,261 psi | 90% | 3146 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 54,331 psi | 85% | 3146 fps | 100% |
| Accurate 4064 | <<locked>> | 90% | 57,145 psi | 90% | 3196 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 56,072 psi | 88% | 3264 fps | 99% |
| ADI AR 2206H | <<locked>> | 86% | 56,130 psi | 88% | 3209 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 92% | 56,681 psi | 89% | 3199 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 84% | 54,810 psi | 86% | 3153 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 84% | 55,724 psi | 87% | 3136 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 55,201 psi | 87% | 3323 fps | 99.3% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 56,869 psi | 89% | 3225 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 57,014 psi | 89% | 3228 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 57,595 psi | 90% | 3255 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 56,202 psi | 88% | 3314 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 96% | 57,609 psi | 90% | 3360 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,249 psi | 65% | 3022 fps | 97.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 46,050 psi | 72% | 3196 fps | 97% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 55,521 psi | 87% | 3212 fps | 99.1% |
| Bofors RP3 | <<locked>> | 90% | 54,621 psi | 86% | 3196 fps | 99.9% |
| Bofors RP7 | <<locked>> | 96% | 57,725 psi | 90% | 3202 fps | 96.4% |
| Hodgdon Benchmark | <<locked>> | 84% | 56,637 psi | 89% | 3140 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 54,592 psi | 86% | 3189 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 55,767 psi | 87% | 3284 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 90% | 55,593 psi | 87% | 3205 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 96% | 54,563 psi | 86% | 3245 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 86% | 56,695 psi | 89% | 3222 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 52,620 psi | 82% | 3179 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 55,637 psi | 87% | 3248 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 96% | 55,027 psi | 86% | 3274 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,882 psi | 56% | 1982 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 57,392 psi | 90% | 3219 fps | 99.9% |
| IMR 3031 | <<locked>> | 86% | 56,449 psi | 88% | 3205 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 56,492 psi | 89% | 3189 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 88% | 56,159 psi | 88% | 3153 fps | 96.7% |
| IMR 4350ᴾ | <<locked>> | 100% | 57,682 psi | 90% | 3225 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 94% | 56,101 psi | 88% | 3182 fps | 96.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 56,260 psi | 88% | 3251 fps | 99.1% |
| IMR 4895 | <<locked>> | 88% | 55,492 psi | 87% | 3228 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 84% | 54,810 psi | 86% | 3153 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 86% | 56,231 psi | 88% | 3189 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 55,419 psi | 87% | 3127 fps | 99.6% |
| Lovex S062 | <<locked>> | 90% | 56,463 psi | 88% | 3186 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 55,796 psi | 87% | 3179 fps | 97.9% |
| Lovex S070 | <<locked>> | 98% | 56,768 psi | 89% | 3215 fps | 97.1% |
| Norma 201 | <<locked>> | 86% | 55,434 psi | 87% | 3156 fps | 100% |
| Norma 202 | <<locked>> | 86% | 55,550 psi | 87% | 3159 fps | 100% |
| Norma 203B | <<locked>> | 90% | 56,884 psi | 89% | 3238 fps | 99.7% |
| Norma URP | <<locked>> | 98% | 54,360 psi | 85% | 3238 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 90% | 57,450 psi | 90% | 3268 fps | 99.7% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 56,840 psi | 89% | 3294 fps | 97.8% |
| Ramshot TAC | <<locked>> | 84% | 55,303 psi | 87% | 3166 fps | 98% |
| Ramshot Wild Boar | <<locked>> | 84% | 54,723 psi | 86% | 3186 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 82% | 55,550 psi | 87% | 3150 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,521 psi | 57% | 2031 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 57,537 psi | 90% | 3186 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 55,550 psi | 87% | 3179 fps | 97.3% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 54,462 psi | 85% | 3264 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 57,363 psi | 90% | 3363 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 55,085 psi | 86% | 3278 fps | 98.8% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 54,389 psi | 85% | 3294 fps | 98.3% |
| Rottweil R 901 | <<locked>> | 84% | 56,724 psi | 89% | 3146 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 55,898 psi | 88% | 3156 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 54,505 psi | 85% | 3186 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 96% | 57,725 psi | 90% | 3202 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 96% | 55,796 psi | 87% | 3179 fps | 97.9% |
| Shooters World Match Rifle | <<locked>> | 86% | 56,231 psi | 88% | 3189 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 56,463 psi | 88% | 3186 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 56,768 psi | 89% | 3215 fps | 97.1% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 55,680 psi | 87% | 3245 fps | 99.6% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 57,609 psi | 90% | 3205 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 54,375 psi | 85% | 3173 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 56,014 psi | 88% | 3084 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 56,231 psi | 88% | 3081 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 56,101 psi | 88% | 3127 fps | 96.7% |
| Somchem S321 | <<locked>> | 82% | 56,072 psi | 88% | 3186 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 56,043 psi | 88% | 3091 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 56,710 psi | 89% | 3192 fps | 99.7% |
| Somchem S355 | <<locked>> | 92% | 54,737 psi | 86% | 3182 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 52,373 psi | 82% | 3248 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 55,869 psi | 88% | 3048 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 56,057 psi | 88% | 3068 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 55,376 psi | 87% | 3120 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 55,724 psi | 87% | 3130 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 55,927 psi | 88% | 3159 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 56,942 psi | 89% | 3241 fps | 99% |
| Vihtavuori N530 | <<locked>> | 84% | 55,419 psi | 87% | 3156 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 57,740 psi | 90% | 3182 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 56,144 psi | 88% | 3245 fps | 98.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 45,339 psi | 71% | 3114 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 57,159 psi | 90% | 3212 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 55,230 psi | 87% | 3205 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 54,563 psi | 86% | 3245 fps | 96.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,478 psi | 59% | 3022 fps | 97.6% |
| Winchester StaBALL Match | <<locked>> | 86% | 54,244 psi | 85% | 3179 fps | 99.8% |
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% | 51,097 psi | 80% | 3012 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 44,889 psi | 70% | 2940 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,995 psi | 80% | 3094 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 42,351 psi | 66% | 2930 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 38,014 psi | 60% | 2897 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 46,905 psi | 74% | 3035 fps | 98.6% |
| ADI AR 2208 | <<locked>> | 80% | 40,001 psi | 63% | 2864 fps | 96.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,776 psi | 76% | 3041 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 80% | 49,066 psi | 77% | 3035 fps | 100% |
| Alliant Power Pro 2000-MR | 36.9 gr | 80% | 42,453 psi | 67% | 3054 fps | 96.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 47,442 psi | 74% | 3051 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,885 psi | 63% | 2894 fps | 98% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,728 psi | 67% | 2963 fps | 97.3% |
| Alliant Reloder-16 | <<locked>> | 88% | 39,407 psi | 62% | 2949 fps | 95.6% |
| Alliant Reloder-17 | 36.4 gr | 80% | 34,737 psi | 54% | 2851 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 94% | 34,838 psi | 55% | 2851 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 43,221 psi | 68% | 3130 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,788 psi | 72% | 3031 fps | 97.5% |
| Bofors RP3 | <<locked>> | 80% | 40,219 psi | 63% | 2910 fps | 98.1% |
| Bofors RP7 | <<locked>> | 92% | 51,271 psi | 80% | 3087 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,082 psi | 78% | 3025 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,819 psi | 75% | 3068 fps | 99.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 52,301 psi | 82% | 3222 fps | 99% |
| Hodgdon H380 | <<locked>> | 80% | 40,480 psi | 63% | 2897 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 94% | 51,140 psi | 80% | 3182 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 80% | 47,297 psi | 74% | 3048 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 34,693 psi | 54% | 2789 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 43,120 psi | 68% | 3012 fps | 98.7% |
| Hodgdon Superformance | <<locked>> | 94% | 51,605 psi | 81% | 3209 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,948 psi | 42% | 1775 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,194 psi | 71% | 2989 fps | 98.7% |
| IMR 3031 | <<locked>> | 80% | 46,876 psi | 73% | 3048 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,018 psi | 66% | 2904 fps | 97.2% |
| IMR 4166 Enduron | <<locked>> | 84% | 50,024 psi | 78% | 3041 fps | 95.4% |
| IMR 4350 | <<locked>> | 96% | 51,300 psi | 80% | 3114 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 90% | 49,603 psi | 78% | 3061 fps | 95.2% |
| IMR 4831 | <<locked>> | 88% | 38,740 psi | 61% | 2900 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 43,700 psi | 68% | 2995 fps | 98.1% |
| IMR 8208 XBR | <<locked>> | 80% | 48,776 psi | 76% | 3041 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 80% | 46,412 psi | 73% | 3018 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 46,383 psi | 73% | 2959 fps | 98.6% |
| Lovex S062 | <<locked>> | 80% | 42,134 psi | 66% | 2913 fps | 98.8% |
| Lovex S065 | <<locked>> | 88% | 44,237 psi | 69% | 2956 fps | 95.4% |
| Lovex S070 | <<locked>> | 92% | 47,398 psi | 74% | 3038 fps | 95% |
| Norma 201 | <<locked>> | 80% | 46,267 psi | 73% | 2989 fps | 99.3% |
| Norma 202 | <<locked>> | 80% | 46,311 psi | 73% | 2995 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,134 psi | 66% | 2953 fps | 97.7% |
| Norma URP | <<locked>> | 88% | 39,885 psi | 63% | 2943 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 41,278 psi | 65% | 2956 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 94% | 47,079 psi | 74% | 3107 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 48,660 psi | 76% | 3041 fps | 96.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 48,037 psi | 75% | 3064 fps | 98.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 52,301 psi | 82% | 3094 fps | 99.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,311 psi | 43% | 1814 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 54,404 psi | 85% | 3136 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 46,180 psi | 72% | 2999 fps | 95.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 44,614 psi | 70% | 3074 fps | 97.7% |
| ReloadSwiss RS 60 | 36.4 gr | 80% | 36,753 psi | 58% | 2927 fps | 98.8% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 39,827 psi | 62% | 2969 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 42,308 psi | 66% | 3035 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 50,488 psi | 79% | 3041 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,164 psi | 69% | 2933 fps | 99% |
| Rottweil R 903 | <<locked>> | 80% | 37,840 psi | 59% | 2844 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 92% | 51,271 psi | 80% | 3087 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 88% | 44,237 psi | 69% | 2956 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 46,412 psi | 73% | 3018 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 42,134 psi | 66% | 2913 fps | 98.8% |
| Shooters World SW4350 | <<locked>> | 92% | 47,398 psi | 74% | 3038 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,130 psi | 60% | 2884 fps | 96.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 47,369 psi | 74% | 3018 fps | 97% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,208 psi | 71% | 2995 fps | 98.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,152 psi | 74% | 2933 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,537 psi | 62% | 2785 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 49,777 psi | 78% | 3012 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 52,779 psi | 83% | 3133 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 46,920 psi | 74% | 2936 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,717 psi | 73% | 3012 fps | 98.5% |
| Somchem S355 | <<locked>> | 80% | 38,334 psi | 60% | 2844 fps | 97.1% |
| Somchem S365 | <<locked>> | 82% | 30,110 psi | 47% | 2713 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 52,823 psi | 83% | 3002 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 47,311 psi | 74% | 2927 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,569 psi | 68% | 2920 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,874 psi | 69% | 2923 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,535 psi | 57% | 2776 fps | 98% |
| Vihtavuori N160 | <<locked>> | 86% | 39,218 psi | 61% | 2887 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 49,037 psi | 77% | 3041 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 80% | 42,380 psi | 66% | 2907 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 41,307 psi | 65% | 2949 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 94% | 37,550 psi | 59% | 2936 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,372 psi | 51% | 2680 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 48,617 psi | 76% | 3087 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 48,327 psi | 76% | 3127 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 96% | 33,243 psi | 52% | 2877 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,904 psi | 70% | 3005 fps | 98.7% |
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 110 powders for 6 mm XC loaded with the .243 | 85gr | Barnes XLC BT. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,363 fps; across all powders the maximum-charge window runs from 1,982 fps to 3,363 fps. Accurate 3100 gives the best case fill at 100 %, and 110 of the 110 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 85.0 gr projectile in 0.243" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-16 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 Power Pro 2000-MR, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for 6 mm XC with the .243 | 85gr | Barnes XLC BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, 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.