I am putting together a 221 FB out of mixed brass and a bbl that I bought many years ago. The cartridge print shows 1.4" case length and many of these where anywhere up to .010" beyond that so I ordered a Lee 221 arbor kit and cut a couple of cases tonight. The end result was 1.396 or .004 under the reamer print. I also got a 223 kit but haven't used it yet.