codemonkey001 Posted February 19, 2012 Share Posted February 19, 2012 hi, i'm getting ready to load for 9mm now. i'm setting up my Dillon carbide dies on my xl650 and i noticed that after running my 9mm brass through the sizing die, the Dillon 9mm dies give it a serious taper. it's a lot more than i've seen on any factory rounds. i can actually feel the taper. and after seating a bullet in the case, the round looks kind of like a dog bone where it tapers in the middle, but not as serious as a dog bone of course. is this normal? should i send back my sizing die? the rounds do fit easily in my Dillon case gauge. thanks Link to comment Share on other sites More sharing options...
Too_Slow Posted February 19, 2012 Share Posted February 19, 2012 (edited) That is called the "Coke Bottle" effect and it is a good thing. It means that there is plenty of neck tension holding the bullets. Brian Edited February 19, 2012 by Too_Slow Link to comment Share on other sites More sharing options...
Sarge Posted February 19, 2012 Share Posted February 19, 2012 Too Slow hit it on the head. When I don't get the coke bottle effect I worry about neck tension. Don't change a thing! Link to comment Share on other sites More sharing options...
codemonkey001 Posted February 19, 2012 Author Share Posted February 19, 2012 thanks you guys are always fast to respond, i really appreciate it. i didn't have this issue w/ my 45acp cases, so i thought it was strange. i will proceed. thanks! Link to comment Share on other sites More sharing options...
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