Also....what is the shortest u go on brace before its not useable...i have some hornady cases that I set aside because they were all 1.270
That isn't bad, I have some 45LC Hornady cases that measure 1.23" which is .050" short. It seems that Hornady brass runs on the short side. It will work if you adjust your seat/crimp accordingly, but if you don't need it just hold it in reserve or sell it.
A few thousands shorter will mean nothing but keep all brass close for the crimp. Crimp is not all that important and you do not have to be within .001". Different lengths means a change in the crimp die for each, not good if cases are all over the place. But small amounts will not hurt because case tension is accuracy. Just trim over long brass but it does not hurt to trim to the shortest brass you have. .010" is a piece of paper!
Edited by 430man (01/01/1211:52 AM) Edit Reason: missed letter
The Hornady brass loaded with the FTX bullets ( factory ) are shorter to accommodate the longer shank of the FTX bullets. This applies to their handgun and long gun loadings. The new Hornady manual and info states this. Were the 45 Colt cases loaded with the FTX bullets?