Al---I have some virgin Lapua cases but none loaded now.
The 221 FB neck walls measure a very consistent .013". Should produce loaded rounds
of about .250" or slightly more over the neck------reamer neck size is .250".
The 222 neck walls are .012"-.013". Could produce loaded rounds of up to about .250"
or slightly more-----reamer neck size is .248".
BTW Al---neither reamer is dimensioned for your Fat Butt approach but headspace will be set
to guarantee a slight crush fit on new cases.
Thanks for your reply.
A. Weldy
I think I getcha' now...... so when you're done your proposed new chambers will neck .255-ish for clearances of:
-221 FB will have .005+ clearance
-222 to have .007+ clearance
some thoughts;
-some will say that .003 clearance is perfect for light bullets, most use .0015 to .002
-I feel that with light bullets you'll not lose accuracy up to .005. Up to .007??? Dunno, never had an accurate rifle that loose.
-some feel that with heavy bullets it's more important to stay below .003
-I feel that with VLD's it's important to keep clearance down below the .002.
-I feel that beyond .005 you run the risk of having necks split after repeated reloads. And even if they don't split soon they'll harden and become crooked, eccentric over time. BUT, with light bullets this may not be a problem, accuracywise.
So, phewww......after writing my thoughts down I find myself to have done nothing useful! So I'll rephrase to "some guesses of little use to you"
LOL
al
