My 2 cents Dale
When you get a caliper get the hornady lock n load cartridge head space gauge set.
you could have measured each and found that (a) was??? that fit and (b ) was??? that did not fit.
also how much did you move by the 1/4 turn or little more
it fits??
with this tool set you can measure a fired round from your gun (a) and set your die to just bump the shoulder back
or measure a fired round for gun (b) and see that you would need to adjust your die to get this new spec etc.
this is a very handy tool set takes all the guess work out.
you will not be disappointed.midsouth has these for 33.10 in my book.