Green Mountain Muzzle Loading Rifle Barrels are machined from high quality American made bar stock, A.I.S.I. 1137 modified, stress relieved, annealed, certified rifle barrel quality steel. All barrels are drilled from solid stock, reamed to a high degree of smoothness, then optically checked for straightness. Very close tolerances are maintained. Diameters vary less than .0002" within any bore.
45 cal 38 inches Octagonal Swamped
8 Grooves
Twist is 1 turn in 60 Inches
Chrome Moly
Green Mountain Muzzle Loading Rifle Barrels are set between centers, and milled octagonal, insuring a perfectly centered bore that will be concentric with the exterior.
Green Mountain Muzzle Loading Rifle Barrels are premium quality barrels in every sense! A small trade mark and caliber mark is stamped near the breech.
Green Mountain Muzzle Loading Rifle Barrels are threaded at the breech for your plug, and factory crowned at the muzzle.
