Thru Bore Table for Bullet Clearance

We suggest installation by a competent gunsmith. Timing, concentricity to bore and brake bore clearance must all be finished. Brakes are supplied with a .245 bore.

Bore Dia. For Bullet Diameters. Leaves A .020″ Min. Clearance (.030″ is Max.)
.245″ .22 & .224 Bullets
.265″ .243 / 6mm Bullets
.288″ .257, .264 & 6.5mm Bullets
.304″ .270, .280, .284 & 7mm Bullets
.328″ .308, 30-06, 300 MAG 300 WSM & 300 RUM Bullets
.355″ .325 & 8mm Bullets
.358″ .338 Bullets

Custom sizes available upon request. Contact Us for more information.