I loaded up up cast in 9mm once and 10mm a couple months ago. Trying to remember the rule of thumb for crimp. If I remember with both calibers I just adjust my taper rump die down just enough to remove the flare and not really applying a crimp so my boolits do not get resized in the process? I removed the flare from my 10mm’s today. They measure around .423-.421 when I take measurements. Loaded them for my Glock 20. OAL is 1.250”. I took the OAL measurement from Lyman’s 50 th load data with 165 gr Jwords. I loaded 180 grain AMEC boolits a few months back at 1.375” and still had room to boot. Well I did the plunk test with the ones I just loaded up at 1.250”. They all drop right into my barrel but some of the rounds don’t drop freely out. Like they are stuck. They do drop out without any force and are seated in the chamber at the correct height. Guessing I need to apply a little more crimp or do you think they are good to go? I didn’t trim my brass. Could the variance in OAL could be causing it? None are longer than max. When I zoom up on my photos I can’t see any taper marks. But the flair seems to be gone. I did push a few against the table with extreme hand applied force and could not get the boolits to move so they seem to be crimped enough or there was enough neck pressure to begin with.
The last four I over flared the necks. I had to tap the press handle pretty firmly to get the brass into the crimp die. I ended up pulling one of them and tossing the brass. It didn’t pass the plunk test and would not nor seat flush. The neck edge was bent over from flaring to much and then bending over when crimping. The other three seem to look OK. The one I pulled didn’t have crimp damage on the boolit which surprised me. I’m a little paranoid since I shot some of my buddies AMEC loads yesterday and leaded my barrel because he crimped them to hard and resized the boolits. The ones I loaded I zero leading with.