Glock 30 Reverse Nosedive

[chhodge69]

I originally posted this on Glocktalk but didn't get much feedback - maybe someone here has see it before or can help diagnose the problem. Thanks for reading

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Have any of you heard of this odd problem? I'm dubbing it the "reverse nosedive" for lack of a better term.

I have a Gen2 G30 that will not feed hollow points. When the gun is fired the spent case ejects properly but the next unfired cartridge will feed improperly. it jams at a +45 degree incline. The lip of the hollow point bullet will be stuck pointing upward caught against the hood of the barrel with the case head resting against the bottom of the breech face and the top of the magazine.

It's not a "stovepipe" FTE, I've tried 4 magazines, 6 brands of factory ammo in varying weights and I'm definitely not limp-wristing. The gun functions flawlessly with RN ammo and with filled in hollow points like Hornady Critical Defense but does the reverse nosedive FTF every 4-5 rounds with standard hollow points.

It's cleaned and lubed regularly and the magazines were all new Glock mags, not aftermarket knock offs. Other than Pearce grip extensions it has no mods installed and now has ~1000 rounds through it.

Have any of you experienced anything similar?

 

[PO2Hammer]

I think the more common term for your jam is the 'high angle feed jam', or it would be in a 1911.
I never used HPs in my G-30.
Is the top of the chamber rough at all? The rounds should bounce off the top of the chamber turn into the chamber, maybe they're getting grabbed by a rough spot.

I would google "high angle feed jam" and you'll find the remedies for 1911s, maybe some of which might apply to your G-30.

 

[LiveLife]

Try HP bullets with "rounded" nose shape instead of "cone" shaped nose. My G30 had difficulty feeding SWC so I ended up just shooting RN bullets.

Remington Golden Saber 185 gr JHP - I reload Golden Saber bullets as they are sold in bulk and I try to duplicate factory Golden Saber POA/POI for practice.

 

[rich642z]

Try Hornady's Critical Defense round. You shouldn't have any problems with the G30.

 

[wally]

Weak mag spring or defective feed lips, the rounds are probably coming out or partially out under recoil. A firmer grip can help.

I always just call these a nose up jam as opposed to a nose dive jam.

I suspect the rounds that feed are longer in OAL which covers up the problem by bouncing off the top of the chamber. Is the slide still behind the cartridge base or is it above, with the extraction groove in the bottom of the slide when it jams?

 

[Ridgerunner665]

It should feed ANY type of hollowpoint...its the gun, not the ammo.

Send it back to Glock...period. Along with an in depth description of whats going on, pictures are always good too.

Their customer service is great, and pretty fast.

I have a G36...and short of loading rounds backwards in the mag, I cannot make it jam.

 

[doc.lonestar]

Never had this issue with my g30. interested to see what was wrong and how it was fixed.

Did you call Glock? They should be able to assist quickly.

GLOCK, Inc.
6000 Highlands Parkway
Smyrna, GA 30082
U.S.A.
Tel.: +1 770 - 432 1202
Fax: +1 770 - 433 8719

 

[Miked7762]

Other than Pearce grip extensions it has no mods installed and now has ~1000 rounds through it.

I've had the grip extensions do this to me on compact Glocks, too. Try inserting a loaded magazine normally, then use your thumb to press up hard on the center of the baseplate. I'll bet you hear/feel a second click when you do this. The poor seating combined with additional downward pressure from the extra grip section caused me problems with the slide only hitting the outer edge of the cartridge rim. Did you notice anything out of the ordinary on any of the cartridges after they misfed?

 

[RX-178]

I've had the same thing happen with a Glock 17L.

All I can say from my experience is that either it went away after a while, or it was specific to that batch of ammo I got.

 

[jackpinesavages]

The 1st round in my Glock .45s is a HP, the rest are FMJs.

Whatever you do, do NOT take your Dremel tool to the feedramp.

Approximate round count?

 

[WRGADog]

My G30 runs fine with HP ammo. I usually run Corbon DPX, 185 grain, +P.

 

[GLOOB]

A couple other possibilities:

Make sure your extractor is clean and examine the rim of your brass. If the brass can't slide behind the extractor, the result is a nose-high jam. Some runs of brass may have thick, out-of-spec rims.

 

[Apocalypse-Now]

I have a Gen2 G30 that will not feed hollow points. When the gun is fired the spent case ejects properly but the next unfired cartridge will feed improperly. it jams at a +45 degree incline. The lip of the hollow point bullet will be stuck pointing upward caught against the hood of the barrel with the case head resting against the bottom of the breech face and the top of the magazine.

there's no such thing as a gen2 g30. the early gen3 g30's didn't have a rail, if that's what you're referring to.

how many rounds through it? recent purchase? had it for years?

did you recently take out the extractor? if so, make sure you put the extractor plunger with the rubber part at the rear of the slide.

also, ever change the mag springs? if not, that's another possibility.

need more info.

searching out feed profile friendly jhp's is not needed for glocks, as suggested by one post here. g30's are notorious for not feeding semi wadcutters, but jhp's should be flawless. it should be a simple fix.

 

[chhodge69]

It's a G30 without the rail, so I assumed it was Gen2 - thanks for clearing that up. I've had it about a year and put about 1k rounds through it. It was like-new when purchased so I'm going with ~1k round count. It's absolutely flawless with any RN ammo I feed it. I've never changed the mag springs since I purchased brand new Glock mags with the gun.

So far I like the theory that the top cartridge is bounced loose by recoil energy. I'm going to work on that angle and post what I find. I'll to look at: mag springs, mag lips, retention of cartridges, recoil spring, feeding mechanics, and my grip. I'll only send it back to Glock as a last resort... that won't teach me anything

Thanks for all the suggestions.

 

[Seven For Sure]

What you have there is a Gen. 2.5 as the Glock Nation calls it. Sorry about the feed issues, new mag springs may help but a Glock that won't eat HP's is rare indeed!

 

[Rexster]

When G22 pistols famously did this back in the early 2000's, in large numbers, the recommendation was stronger-than-factory magazine springs. Glock never admitted the problem existed, but did, quietly, up the strength of their .40 mag springs, from what a Glock armorer told me. This was most notable when a weapon light was mounted, but some did it, light or no light, including one of my G22 pistols. Stronger mag springs fixed the problem. (Mine were Wolff.)

Keep in mind that mag springs should be renewed. If yours are old, that could be the problem. If new, well, perhaps a bad batch of springs got into a run of magazines. That happened to a major brand of usually very reliable aftermarket 1911 magazines in the late 1990s.

 

[Rexster]

Also, if your recoil spring is anything other than stock, try a factory recoil spring assembly! I depended on my Glocks, on and off the Clock, and ONLY used factory recoil spring assemblies. There must be a balance between weights of the major springs in auto pistols, regardless of the maker.

 

[GLOOB]

A couple other possibilities:

Make sure your extractor is clean and examine the rim of your brass. If the brass can't slide behind the extractor, the result is a nose-high jam. Some runs of brass may have thick, out-of-spec rims.

 

[voyager4520]

1. Try a new factory guide rod assembly.
2. Try Remington Golden Sabers or Winchester PDX1 if you haven't already.
3. If you know how, detail strip and clean the slide particularly the extractor and the slot the extractor fits into.

This isn't just a problem with your G30, or with older G30's, a few people who've bought new G30's recently have had the same problems. I know of one person who's so fed up with his that he's about to throw it in a box with a letter to Glock telling them they should replace the gun.

 

[whalerman]

I would sell the gun. A Glock that doesn't feed HP ammo is so rare you probably could get a really high price for it.

 

[Dapperdan]

My G36 had feed issues after I installed the Pearce grip extensions, both with hollowpoint and ball ammo. Took extensions off, no issues with either.