Re: Chrome Lined Bore
I've done this on several barrels,particularly Israeli .308 1919 machinegun barrels used for precision rifles.I used a standard carbide tool bit,NOT indexable tooling with inserts!Use the old 3/8" carbide tool bits that you grind relief on.Run at maybe 150-200rpm and take small cuts,cut from bore ID out to barrel OD and go slow as you hit the chrome.After cutting your crown you might use your tool post grinder to break the edge of the bore,you don't have to but if you want.Just be careful and it will work out.If I can help just PM me.