trouble shooting a jam issue...

hoochie

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ok, so I am frustrated.
shooting my Glock.. have been reloading for it for 2 years or so.
Then, just recently I got a Dillon press, and switched to this press from the old one.

so here's the problem:
my wife and I are shooting the exact same ammo, and I get jams almost every mag. She is shooting a P99 and it functions flawlessly.

the problem with my Glock is that when the slide comes back to chamber the next round, it almost closes, but not quite... JAM.
the same bullets, primers and powder charge are being used as I have been for the last two years.
it jams so tight, that I have to place the gun against a table or other solid object and slam my one hand against the other hand holding the gun.. this allows me to "cycle" the round out of the chamber.
I cannot force it forward, nor can I pull the slide back with "normal force".

I checked my casings and they are all within .001 of what it says for trim lenght, and the bullets are seated at 1.100. I am using carbide dies and applying a taper crimp....

At first I thought maybe it was a powder issue.. but then theat would cause it not to eject the last fired round. Then I thought maybe its my recoil spring, but then this doesnt account for me not being able to push the round in the chamber ( helping it along a little).
its a 3rd Gen glock that is about 3 years old.
any ideas?
and I have never had this problem before until this last batch on the Dillon. 1000 rounds of "piss me off".
 
Pull the barrel out of your gun, and chamber check your ammo.

My first guess is that perhaps you are not sizing the cases down far enough. Is your die making contact with the shell holder?
 
Jam

I have a dillon press and had the same problem, if you pull your barrel and check your loads you will find that some do not fall cleanly into the bbl, they hang up on a bulge at the base of the cartridge, it is a few thou larger. Your wife's gun must have a more tolerant chamber than your gun. Glock brass tends to bulge and weaken in this area, when you resize you cannot remove this and when you seat the bullet you get a slight expansion.

You need a Lee Carbide factory crimp die..

http://www.leeprecision.com/cgi/catalog/browse.cgi?1171772179.5647=/html/catalog/dies-pistol.html

If you call lee you can get the product # for just this die, you do not need the whole set. I replaced my dillion crimp die with this problem and went from about a ~20% failure to feed rate, to zero. You can also run your loaded ammo thru this die to fix the ones that will no chamber properly.
 
If the problem is a bulge at the base of the case I don't see how a Lee Factory Crimp die will help. I think that you might try setting your sizing die as low as you can in the press and forget the Lee factory crimp die since you said that you are using a taper crimp die which is what is required for auto pistol cartridges which headspace off the case mouth.
 
Silverback.. you're on the money bud!
When I bought the press, the dies were already in the "head" of the press. I never thought to check the depriming die....
the guy I bought the press from was an experienced reloader, and I took it for granted that the die would be set correctly.
I only adjusted the taper crimp die to suite my liking.
thanks,
problem solved.
what a relief.
 
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