I have been shooting and loading for T/C contenders for 30 years now but up till now I have only used j- bullets with out crimping them.
I now have a 32/20 and a 30 herrett that I want to use to harvest antlerless deer with and do this with boolits that I have cast. So far the cast boolits I have tried do not come close to the accuracy of any j-bullets I have put thru either barrel. The cast boolits I have tried so far are Lee 309-120-RN and thier 309-150-FRN. I gave shot them with and with out gas checks. Both perform better with gc's applied. All we're shot with out crimping. Would crimping effect the accuracy of a bullet in any way?