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Our list of available chamberings is extensive! Select your choice from the drop-down menu below.
We will match the most ideal rifling twist rate to your cartridge and barrel length selections. For example, a 300 BLK under 8 inches will be built with a 1:5 twist 5R rifled barrel, and a 300 BLK 8 inches or over will be built with a 1:7 twist 5R rifled barrel. If you have a specific twist rate request from X-Caliber’s available options, please type that into the Notes field at the end of checkout.
| Chamber | 300 Blackout, 6.5 Creedmoor, 308 Winchester, 375 Raptor, 223 Wylde, 224 Valkyrie, 6mm ARC, 6BR, 243 Winchester, 6mm Creedmoor, 6×47 Lapua, 6.5 Grendel, 260 Remington, 6.5×47 Lapua, 6.8 SPC, 7mm-08 Remington, 270 WSM, 300 WSM, 338 Federal, 350 Legend, 358 Winchester, 45 Raptor, 450 Bushmaster |
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