OK, I think I can scare up a few more pics...
I pulled the 30 cal barrel off my "shooter" (1st pic) and screwed my faux-artillery barrel in (2nd pic)...without any torqueing, it's about 1/2 a turn off...or about .025"...(see gap in 3rd pic)...
I assembled it on the frame so I could get an idea of what it is I'm doing...
If I use 1/8 turn as my "crush" factor, then I need to remove ~.018" from my flange...which would put me at about .152" for my flange thickness...and Rick W. gave me a measurement of .135" on his artillery barrel...that'd make it ~.017" off...close enough!!!
