H&K double feed!!!!

F

funinsun

New member
Don't know what else to call it. At the range today and my beloved H & K USP .40 was popping a live round out and leaving me with an empty chamber!! Ever hear of this?? Not to mention the live round would bonk me in the nose everytime.
I also got FTF and stove pipes like crazy, wasn't smart enought to stop and figure out which magazine it was but I am sure that that is the problem, but how the hell does a live round miss the extracter and get popped out????

P.S. Killed the X and ten ring @ 25 yrds, that gun shoots better than I do, shot both left and right handed with TIGHT groups.
 
HA! I saw the title to this thread and started laughing!

I've done the 'double-feed-hustle' a number of times during IDPA competition with my fullsize USP45, and even twice in the same stage! My reloads in .45ACP were sketchy to start with (not enough powder, not enough crimp), but it certainly makes for building good malfunction clearing skills!

I have never had it forcefully eject a live round on me, but it has bumbled on my reloads because the slide does not retract with enough force on extraction/ejection to grab the next round in the magazine and feed it reliably. This results in a round in the chamber, slide out of battery (about 1/4") and the extractor *behind* the rim. Tap-Rack results in a double-feed followed quickly by Slide-Lock-MagDrop-Rack-Rack-Rack-MagIn-Overhand-Bang (didja get all that?!?).

I would think that your feed lip spacing on the magazine would be the culprit to allow a live round to be ejected out the top - most likely the last round in the magazine. As the second to last round goes up and in, the last round comes up against the feed lips on the magazine on ejection/extraction after firing, and both empty case (from chamber) and live round are ejected out of the top.

Take some calipers and measure among your magazines to determine if that may be a contributing factor.

As an aside, the USP line is known as ultra reliable and ultra durable, and I have no doubts about that. Once I got my reloads sorted out, it has been flawless and I *love* to shoot it at matches. HTH,
 
Truly bizzare malfunction... I read your post and snatched up the nearest autopistol working the slide and running through the firing sequence in my head... I'm no firearms genius, but Longduck seems right: the only thing I can think of to cause this would be an out-of-spec gap between the mag lips combined with some truly healthy fresh mag springs.

------------------
"..but never ever Fear. Fear is for the enemy. Fear and Bullets."
10mm: It's not the size of the Dawg in the fight, it's the size of the fight in the dog!
 
For those who are interested here is what I found. The lip space IS off, I can see it with the naked eye. I had to have happened when the same day I was cranking my mag in & out of my Galco single mag carrier, pushing it against the walls trying to loosen the darn thing up. Didn't put that together 'till later. So how do I fix it????

I tried to mimick what happened at the range my manualing cycling the slide , but obviously it needs some power behind it, cuz it didn't pop out a live round.

I never had to mess with a mag before, is there a fix or no???
 
Why on earth would you take reloads to a competition without going through a reliability session at the range first?
 
There is a fix, and it's called 'careful bending' of the lips back to match the profile and spacing of a mag that you *know* to be working properly.

Go slowly, don't overdo it, since going overboard and bending *back* will fatigue the metal. These are the critical parts in an autoloader, so take your time and make it right the first time.

Once you get the spacing and profile complete, range test for function. In the future, MARK YOUR MAGAZINES to help identify problems at the range that are mag specific. HTH,
 
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