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Old 12-07-2013, 03:21 PM   #11
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I would say to crank down on your crimp die another 1/4 turn. See how that works for you.

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Old 12-07-2013, 03:58 PM   #12
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I think I can rule out the mag and extractor since these particular rounds will not fully seat in the barrel even if I remove it from the gun. But again, they look great when I check them with a gauge.

I considered a tighter crimp might help but I've noticed if I crimp any tighter the bullet seater leaves a ring around the top of the bullet. I wasnt sure if that would cause any problems.

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Old 12-07-2013, 04:55 PM   #13
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How hot are the reloads? Light loads can cause some issues with tight guns. Slide does not cycle all the way.

I am betting it is a crimp issue. Are you using mixed headstamps? A variance in length will cause a variance in crimp and can cause this issue

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Old 12-07-2013, 04:57 PM   #14
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1. Bullet seating depth. I tend to run mine toward the long end of OAL. This is great until the bullet hits rifling before the cartridge is fully seated. You may need to seat a bit deeper. Some bullet designs are more of an issue than others. Use your barrel as a cartridge gauge when working up loads for your EMP and you should be able to work through this without further drama. However, always be mindful of your Min OAL.
2. Crimping? 9 mm doesn't need much. An ever so slight taper is enough. FWIW, more than that is just adding wear on the case mouth. Unless it's totally hosed one way or the other, this is probably not the problem.
3. Other Brass issues? If your cartridge gauge is working, there probably isn't much chance that this is the problem. However, a Lee Factory Crimp Die might be worth looking into to down the road. It's more of an insurance policy than a requirement.
4. Extractor? If, as you say, factory ammo is working brilliantly, then your extractor is probably fine.
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Old 12-08-2013, 05:15 PM   #15
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I'm only using one type of bullet. FNP I think. I'll try adjusting the OAL just for kicks but I don't see any marks on the bullet when I extract the jammed rounds. Just near the base of the casing. The part my sizing die can't reach.

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Old 12-08-2013, 05:27 PM   #16
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What brand of reloading dies are you using?

Reloading equipment is like firearms. The inexpensive may get the job done, but there are trade-offs.

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Old 12-09-2013, 02:24 AM   #17
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I'm using Hornady. It's just that last bit of the casing that the die can't reach that's casing the problem. I have some RCBS dies that don't seem to reach any farther.

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Old 12-09-2013, 05:08 PM   #18
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I have seen the same issue and used the same fix as Overkill mentioned.

The wife shoots a Sig P238 which is just a baby 1911. I found that I had to seat the bullets a little deeper than my original setting, which was in spec based on COL range listed. I finally went down to .002 over min COL and all the failure to chamber problems went away.

Can't guarantee that will fix you issue, but it worked for me.

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Old 12-10-2013, 03:59 PM   #19
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Well I finally got some calipers and did some testing. Turns out if the base of the case is over 9.9mm then they wont feed and get stuck in the barrel. Most of my rounds are 9.87mm at the base, but maybe 20% are 9.93 or so.

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Old 12-10-2013, 05:18 PM   #20
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Glad you found it and got back with us.

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