My 54 Cal PA Mountain Rifle built by York County Master Gunbuilder Brad Emig has a PA State based Colerain Barrel Co. crafted barrel w/6-groove, round bottom cut rifiling, .016" deep. The rate of twist is one turn in 56". Barrel is a "swamped" (or tapered and flared) octagonal barrel. Precision crafted to closely duplicate the original barrels of colonial America.BenJr said:Anyone have experience with colerain barrels. Looking at one in .54
Curious how accurate & load combinations used in the 1 in 56 twist barrel.