How many different magazines did you try??

 

All magazines or one in particular?

 

In Glock Armorer school we were told that 95% of problems were user induced, 4% ammo problems and 1% Glock defect. I would check you grip and shooting technique first.

BTW how old is your MPro 7 CLP? They haven't made that in a long time have they?

 

In Glock Armorer school we were told that 95% of problems were user induced, 4% ammo problems and 1% Glock defect. I would check you grip and shooting technique first.

Yup--- you can see that here on most of the "issue with" discussions.
Glock spends an inordinate amount of time, workforce, and money dealing with customer returns. Amazingly, they stay gracious on the phone.

 

Only used the Glock mags that came with it. Failures weren’t with any one mag in particular.
No limp wristing or technique issue. Just for some background I was a Marine and have a fair amount of different firearm background. That being said I’m also no expert by any means, especially with Glocks, so it could very well be some kind of user error but we can rule out technique.

 

Mpro7 is still made, I just bought a gallon last month.

 

Sure it is. The cleaner spray and the separate oil. You stated MPro CLP which isn't made.

 

You didn't lubricate the magazines did you?

 

I just bought my first Glock this week. G20 10mm Gen 5 MOS. I had the shop put on Trijicon HD Night Sights at purchase, otherwise it’s fully stock. I picked up 500rds Magtech 180gr FMJ and 20rds Winchester Big Bore 200gr SJHP.

Day 1: Cleaned gun, dry wiped and spot oiled with Lucas Extreme Duty Gun Oul. Shot 250rds Magtech with 7 nose up feed failures. 10rds Winchester, same failure but was every other round!

I had never used that oil before but gave it a go after being recommended by the gunsmith. I thought maybe that was the problem so I again cleaned, dry wiped and spot oiled but used my usual Mpro7 CLP.

Day 2: Another 250rds Magtech with nose up feed failure 3 times. Better but still no bueno. 10rds Winchester, still failed every other round.

I’m hoping you guys can help me figure this out 🙏

Here's your trouble-shooting list:

From Glock Armorer’s Manual

Observed Problem – Failure to feed

Probable Causes -

1. Shooting with an unlocked wrist
2. Underpowered ammunition
3. Weak recoil spring
4. Weak magazine spring
5. Dirty Chamber
6. Dirty magazine
7. Magazine not properly inserted
8. Tight Extractor
9. Deformed magazine (magazine sides or lips deformed)

These are not exclusive.

 

My gen 4 (stock with the same sights) eats that same magtech ammo all day so no issues with that particular round.
Did you have anyone else firing it?

Thank you for your service and not questioning your technique but it’s always a process of elimination.

 

No I didn’t do anything to the mags except dry wipe em before leaving the range. I actually had the same thought of user error at the range and tried the M and L backstraps to see if a grip change would help but didn’t make a difference.
I don’t have the best luck in the world, maybe I got the 1/1000000 lemon? I’ll swing by the store later today and have the guys check it out just in case.

 

Have somebody else shoot the gun and see if the problem persists.

 

Excellent idea!

 

Hold a couple of rounds out of each mag for a hundred or so rounds.

Lube per Glock specs-Always

 

Not saying it's technique either, but I will share a personal experience. I was a fairly experienced shooter when I bought my first Glock, a G27.3. Despite having shot over a dozen metal-framed handguns and thousands of rounds, I had many problems. I attributed it to the gun but stuck with it, took advice from friends who already had Glocks, and eventually realized I was limp wristing. That may or may not be your problem.

Considering you had many fewer FTF's the second round with the Magtech, it could be the gun is breaking in, or could be you're getting used to it. I've had good luck with Magtech in every caliber I've tried, but I've also had guns that didn't like certain brands, and a few that only liked one or two.

I'm currently experiencing FTF issues with a Zaffiri 17L slide and barrel and in the process of trying to eliminate the variables (mags, polishing feed ramp, RSA, etc.). (I don't think I'm limp wristing.)

Good luck! Keep us posted on your progress.

 

I know some of the first users of the gen 5 20 reported problems at first. I figured Glock had quietly fixed those issues

 

Joe, Nope. Still Messed up. Worst gun I've ever had for nose up jams. Cheap, weak recoil spring too. HATES Full power loads. After installing a DPM spring at 22 lbs it finally feeds regular low powered factory practice ammo O.K. But as a bear gun it's useless. The gen 4 w a 22-24 lb spring is reliable w the full power loads but you have to replace the bbl or some will blow out at the cartridge bases. The new Gen 5, rifled bbls are match quality Awesome. The " improved" trigger still sux thou. Mines 7 lbs even with the $.25 polish job Lenny showed. Smoother but still 7 lbs & a long reset. Not acceptable in a bear gun. The G40 long slide seems to be working out w the full power loads. Double tap, Buffalo bore, Underwood 200-220 WFN Hardcasts being the preferred loads. Glock may have the 9s nailed down but their 10mm gen 5 still needs some work. Personally, I think it's a combo of weak springs & the the new designed mags lips. Measured all 3 of mine & none were the same & the mag springs are also too weak. Had to replace mine w Wolf +10. On the UPside, I have several XDM-Es & non of them have ever failed no matter what I feed em except the 230 gr WFNHC which are jamming up every gun I've seen. . Built for Norma's original 10mm loads. WAY hotter than most of the weak factory junk ammos. To be fair thou. Many getting the G20s gen 5s are having few issues at all w standard Alaskan bear loads. But they don't shoot theirs very often. At $3 a round they can't afford to. I blew $500 of my Underwood's & Buffalo bore ammos just getting my unit semi functional. I run my bear guns HARD, FAST & FURIOUSLY. In grizzly country they HAVE to be 100% dependable & my G20/5 isn't. Yet. I'm thinking maybe a KKM stainless replacement bbl next. That's the standard up here for the gen 4s. With a bear in your face LONG range accuracy isn't an issue. DEPENDABLE ammo feeding is. The coating in the gen 5 is NOT slick. Tried polishing the feed ramp & chamber & the coating is tougher than my normal polishing compound is.

 

It’s not unusual for the RSA to be a little stiff right out of the box. Sounds like if it’s getting better the spring might just be coming around. Exercise that spring a little before your next range session and see if it improves.

 

Top of the list for causes of Glock malfunctions seen in all these forums - SHOULD be:

1. New Glock owner/shooter
2. Shooter making bad choices in equipment, ammo, or technique
3. New Glock gun needs to loosen up both mechanically, and the shooter
4. Ammo

 

For what it’s worth, I have been using the Lucas oil for 4-5 years on Glocks and others with no problems.

 

I had a G20 Gen5 before I got out of 10mm and while burning up ammo at the range I had a few failures to feed with, was mostly using Blazer Brass 180gr or Remington 180gr FMJ

 

So, whatever happened here? For me and many others, it was the weak springs in the newer G20 mags.

 

I just bought my first Glock this week. G20 10mm Gen 5 MOS. I had the shop put on Trijicon HD Night Sights at purchase, otherwise it’s fully stock. I picked up 500rds Magtech 180gr FMJ and 20rds Winchester Big Bore 200gr SJHP.

Day 1: Cleaned gun, dry wiped and spot oiled with Lucas Extreme Duty Gun Oul. Shot 250rds Magtech with 7 nose up feed failures. 10rds Winchester, same failure but was every other round!

I had never used that oil before but gave it a go after being recommended by the gunsmith. I thought maybe that was the problem so I again cleaned, dry wiped and spot oiled but used my usual Mpro7 CLP.

Day 2: Another 250rds Magtech with nose up feed failure 3 times. Better but still no bueno. 10rds Winchester, still failed every other round.

I’m hoping you guys can help me figure this out 🙏

 

I had the similar issue with Magtech fmj, but only when racking. After that my g20 gen5 ran fine. Sig 180 gn fmj ran like a dream, at the same 1250fps as magtech. Heads up, different cartridges are going give varying chamber support. It's weird. Definitely will affect how she chambers.

 

My G20

 

Oops, My G20 runs beautifully with any commercial ammos EXCEPT the hot bear loads we get em for. Hates the full power loads. I put a 22 lb DPM spring in mine & that helped a lot but it still jams w Underwood & B.B. bear loads & that is not acceptable in a bear gun. I think it's the mags. None of my 3 are the same lipwise. Ones parallel, 2 slanted & uneven. All 3 have different width openings. Have seen others tune up the mags lips & fix the jamming problems. Some special tool needed to do that & I can't find the exact dimensions for that anywhere. I have 3 XDM-Es and they never jam & eat everything no problem. Most folks here in Alaska have Glock G20 gen 4s& they change the weak slide spring & replace the bbls due to blowouts. 100% reliable after that even with the low powered practice crap. I haven't heard of a single problem w any of the G40s. Considering all the harmonics that have to come together perfectly & have for millions of other glocks I'm amazed I'm having so many probs w mine.

 

Nothing wrong with my new G20SF.

 

I just took my new Glock 20 Gen 5 to the range and shot two magazines with two different types of ammunition. I had 6 different nose up failures to feed in the first magazine. Second magazine shot without issues.

I am a firm believer that every firearm deserves a 500 round break in period. After that, it’s an issue with the firearm. Unfortunately, with 10mm ammo prices, this is an expensive proposition for the Glock 20. But I will say, I don’t currently trust my Glock 20 as a bear gun - I’ll have to put more rounds through it and see if it continues having the issues described in this post. FTF is a big deal when you’re in Grizzly country.

 

I just took my new Glock 20 Gen 5 to the range and shot two magazines with two different types of ammunition. I had 6 different nose up failures to feed in the first magazine. Second magazine shot without issues.

Yours sounds like a magazine problem .

 

Dang, it’s been 20 years since I had a Glock 20 and it never had a hiccup. Sounds like Glock is now putting profits over quality

 

Check your mags. Non of my 3, gen 5 mags were the same. Different angles, different heights. 1 parallel, 2 V angled. Same nose up jams & FTFs jams on the bottom. Had a gen 4 mag that always worked. AFTER having the ramp reangled, polished & replaced the bbl w a precision KKM bbl it STILL jammed. A LOT. THEN I measured the gen 4 & bent the feed rails to match & bent the front lip out a bit & polished all that. THEN it finally started feeding right w either bbl for the top 10-11:rounds before jamming. After putting stronger mag springs in it finally cleared full mags w/o failing. Factory springs are weak & the 200-220 grain hot bear bullets were just too heavy to feed properly. If you want a WAY better trigger, do the 25 cent polish job in Glock talk & replace the stock connector w a Ghost Angel 3.0 w no wall for a smooth rollover break or A Precision Overwatch