fremont
10-19-2013, 12:16 PM
I'm loading 311291's in a 300 Savage. Lyman boolit manual says 2.358" COAL. Given the dummy round I'd earlier constructed to ensure functioning, I noticed a boolit setback of approximately .015". So.....I seated at around 2.373". I adjusted the Lee FCD to apply a proper crimp (mouths were belled prior to boolit seating), and--lo & behold--I get setback of .025"-.030" down to around 2.345" (similar to what I'd seen with the dummy round).
Is it a function of the crimp groove, meaning that when a crimp is applied the brass is going to "pull" the boolit down until the crimp conforms to the boolit/crimp groove shape?
I'm not particularly worried about a shorter-than-specified COAL, as I'm not expecting my newly acquired M99 to be a tackdriver, but I am interested on whether I should give up trying to stick an exact COAL when crimping cast boolits.
Is it a function of the crimp groove, meaning that when a crimp is applied the brass is going to "pull" the boolit down until the crimp conforms to the boolit/crimp groove shape?
I'm not particularly worried about a shorter-than-specified COAL, as I'm not expecting my newly acquired M99 to be a tackdriver, but I am interested on whether I should give up trying to stick an exact COAL when crimping cast boolits.