I chamber a few barrels and most manufactures write or stamp the bore and rifling IDs on the barrel. I have both pin gauges +/0/-.0002 and reamer pilots in .0001 increments. The problem I am encountering the diameters written and stamped are not what I am finding. I clean the bore with a nylon brush to insure no lapping compound is in the bore. I realize temeprature coul be the difference. I measure my barrels at 68-72 degrees farenheight.
Most measurments are with in .0004 to .0006. I am wondering if I am measuring incorrectly or are the barrel makers and/or tool makers measuring incorrectly. When I check the pins or pilots they measure what is indicated by the manufacture.
I have found the bore size marking inconcistency accross the board with different barrel makers.
Have any of you found this to be true with the barrels you are buying?
Nat Lambeth
Most measurments are with in .0004 to .0006. I am wondering if I am measuring incorrectly or are the barrel makers and/or tool makers measuring incorrectly. When I check the pins or pilots they measure what is indicated by the manufacture.
I have found the bore size marking inconcistency accross the board with different barrel makers.
Have any of you found this to be true with the barrels you are buying?
Nat Lambeth