Thanks Pete, I just brought my first Handi, a 270 ultra comp, home a couple weeks ago and didn't pay enough attention when I bought it, because she was a little loose. I went through the shim procedure described here and after the second try the shim held and came out very nicely so far.
I was mostly concerned about tolerances over the history of the companies products as I know changing vendors and/or mfg methods could be a problem. I basically didn't know how closely one had to match serial #'s.
Thanks again,