9mm Lead bullets coming out of brass.

[bigedp51]

The Lee Factory crimp 9mm die has two carbide sizing rings, the upper sizing ring is larger than the bottom sizing ring. I load lead, plated and jacketed bullets using the factory crimp die without any problem. I also have the Lee factory crimp die in .40 S&W and .44 Magnum loading lead, plated and jacketed bullets without problem.

In my first posting I stated the taper crimp should be between .002 and .004, on lead, plated and jacketed bullets. On lead and plated bullets anything over .002 will cause crimping problems on these type bullets, you may just use the taper crimp to remove the case mouth flare and have a crimp .001 to .002 smaller than case diameter. The secret is to not over crimp and have the correct size expander for proper neck tension.

In the photo below are 50 Rainier .40 plated bullets shot from a stock Glock barrel using the Lee factory crimp die. I don't see a problem with my Lee factory crimp die and the complainers just need to learn how to use the die properly.

But at 63 with chronologically gifted eyesight I have to use my bionic eye to see the target clearly......and nail it.
(it gives a whole new meaning to "cheaters")

 

[josh.rizzo]

I found out what it was. My Lyman seater die does have a built in crimp, but I had it backed off just enough that it was removing the bell without really crimping the case. I saw the case taper just a thou or two towards the mouth, so that wasn't the problem. And the bullets were not showing any rifling marks.

However, upon inspection with a flashlight I noticed a smooth ring around the bullet just above the case mouth after chambering. It was hard to notice without really close inspection. It turns out that it was my tight-chambered match barrel combined with bullets that were slightly too wide. The chamber was gripping the bullet just before the rifling. If the bullet was on the extra wide side, then it wouldn't chamber all the way and ejecting it would pull the bullet out of the case.

I seated them back another couple thou and it eliminated the ring I noticed. I'll have to try another hundred rounds to be sure, but I'm pretty sure that was the issue. Ultimately I think I'll stick with jacketed bullets after I use these up, as they are definitely a little oversized.