To be honest, my expectations of the groove dia. were at .556 plus. The chamber end cast was done twice. The measurement of the groove depths measured by a micrometer from a low of .5510 to a high of .5518. Wanted to make absolutely sure that this was correct. Took a pure lead minie ball and carefully hammered it into the muzzle end about .100" deep. Carefully pulled it out and measured. High of a little under .552 using my micrometer. Used a dial caliper also to make sure that I wasn't misreading my micrometer -.552.
Thoughts are that there are (of course) tolerances in the land and groove diameters. Mine is probably towards the low end. Can't really say for sure as this is the only barrel I have to measure.
Hopefully others will share their experiences.
Thank you for your replies.
Bookmarks