Could anyone suggest how to determine the chamber info of my rifle? Rifle : Les Baer Tactical Recon (Special Order) Info : RH Stiller Tac-30 , ADL T/G, .308, Heavy Barrel 1.240â€x 3â€ Straight Taper to .930 Muzzle @24â€ Barrel B/C, Recoil Lug 0.30â€ thick When ordering, they do not available any option for choosing Chamber Size. They just mention " chambered using reamers from Pacific Tool & Gauge. Dave Kiff, PT&Gâ€™s owner, is widely recognized as an expert in chamber and reamer design and he specially designed the reamers to meet two design objectives. First, the chambers had to be conducive to maximum accuracy. But just as importantly, each chamber had to accept all military and commercial ammunitionâ€”a capability particularly important in the .308 Win./7.62x51 mm NATO. " The guarantee group was 10 shots within 1/2" MOA by factory match ammunition (FGM 168). So, how can I know the chamber spec (Chamber type & Freebore)?