Glock pistol shooting large groups regardless of ammo or shooter.

Lojak

Lojak

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Hi all,

I have had a Glock 48 for a few years which I've had nothing but trouble with and I'm wondering if I should be taking it to a gunsmith with solid experience with Glock's or talking to Glock directly, or is it me? I do not normally shoot it because the experience is frustrating. Essentially the problem is consistently large, very large, groups. 12" to 18". I've tried a dozen different types off factory ammunition (115gr through 147gr) to no effect. I bought the version with the Ameriglo sights, and after I noticed the front sight no longer had luminescence, I swapped the front and rear sights for Trijicon HD sights. (I used a proper sight tool for both the front and rear sights, buy once cry once). No change, and again multiple types of ammunition. I've asked others to shoot it and there are still large groups, some smaller than my average, some larger, but typically no smaller than 10".

Now I own other Glock's and I have no issues shooting groups with those. I own a few other brands of pistols and revolvers, no issues. But this one Glock 48 .. I am at a loss.

Does this sound like something a gunsmith can assist with?
 
Not many folks are actually proficient with Handguns to begin with so take that for what it’s worth. The glock 48 is a slimline designed for concealment for defensive situations. Data shows 21’ is the max distance you’d most likely ever have to take a shot which is what that pistol is good for. Next range trip make sure that target is not further than 7 yards and try again. 4-5 yards may be a good start. Don’t worry about what the guy/girl in the next bay thinks of you even if your target is at 3 yards. Consistency is what will get you results regardless of handgun. Focus on the fundamentals and figure out what grip serves your hand size best and run it. Shooting more than 150rounds in a training session is overkill. Load your mags 3-5rounds and practice reloads while your at it.
 
rubberdonuts said:
Not many folks are actually proficient with Handguns to begin with so take that for what it’s worth. The glock 48 is a slimline designed for concealment for defensive situations. Data shows 21’ is the max distance you’d most likely ever have to take a shot which is what that pistol is good for. Next range trip make sure that target is not further than 7 yards and try again. 4-5 yards may be a good start. Don’t worry about what the guy/girl in the next bay thinks of you even if your target is at 3 yards. Consistency is what will get you results regardless of handgun. Focus on the fundamentals and figure out what grip serves your hand size best and run it. Shooting more than 150rounds in a training session is overkill. Load your mags 3-5rounds and practice reloads while your at it.
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Didn't read his whole post did you.

OP, I'd get it looked at.
 
rubberdonuts said:
Data shows 21’ is the max distance you’d most likely ever have to take a shot which is what that pistol is good for.
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I will give you the benefit of the doubt that you are being sincere in your complete reply, but seriously man? Really? What country do you think we are in?

recce said:
OP, I'd get it looked at.
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Thanks, appreciate it.

Butcherbill said:
Out of curiosity have you shot it off of bags, you will eliminate user error greatly doing this. What distances are you shooting it at?
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Yes, I've shot off bags multiple times, including today before and after swapping the sights, again with multiple brands of ammo & different weights. Distances were 10m and 20m, which is what is permitted at that club.
 
So just reading your post? what's the "crown" look like? I believe the G48 uses the "marksman" barrel, it's been my experience that they generally don't need a "break in". I would take a good look down the barrel? and see if there are any "issues" baring that, in my experience, outside of changing the barrel? it's a slide problem/change. Contact Glock and see what they can do?
 
Lojak said:
Yes, I've shot off bags multiple times, including today before and after swapping the sights, again with multiple brands of ammo & different weights. Distances were 10m and 20m, which is what is permitted at that club.
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I’d start by looking it over really well, check the crown and look down the barrel for any signs of wear or damage. Any excessive slide to frame slop or wear, if your shooting it off bags at those ranges and it’s still not grouping then there’s something going on with it. My guess is barrel related, did you buy it new or used?
 
how are the springs?
My BHP improved after replacing weak old springs.

Can you swap the slide or barrel with any of your other glocks?
 
Combat style sights tend to have a wider notch on the rear sight, there is more light visible on the sides of the front sight, this makes it more difficult to center the front sight evenly in the rear notch. Night sights and white outline sights add a lot of distraction in keeping sights square both horizontally and vertically. Try to black out your sights, a product called Sight Black or some candle soot may work, this will remove any glare and define the sights better.

You didn't say what size or type of target you were using, large targets equal large groups. Turn your target around and use the blank side, put a small dot on the target for an aiming point, a marker works or even a bullet hole. Shoot at a closer distance and aim so that the dot is on top of the front sight. Pay lots of attention to sight alignment while pulling the trigger. When the gun fires keep the trigger held to the rear until recoil subsides, also keep your head and eyes paying attention to the pistol. Too many times the shooter raises their head to see where the shot went and that's a no-no, all part of follow-thru.
 
Have a good shooter shoot it before you do anything. If someone can demonstrate good groups with another pistol, give them 10 rounds to try yours
 
Daver_II said:
Have a good shooter shoot it before you do anything. If someone can demonstrate good groups with another pistol, give them 10 rounds to try yours
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When I first got my G17 after shooting some rather over large groups with it I had an IPSC ninja shoot it at the same range.

It was rather embarrassing.

For me........
 
Had same problem with my Gen 4 glock 22 updated trigger to a Gen 3 and it helped just turned out I really suck with a glock lol my buddy did say the trigger was ####ty and he owns half a dozen glocks
 
geologist said:
When I first got my G17 after shooting some rather over large groups with it I had an IPSC ninja shoot it at the same range.

It was rather embarrassing.

For me........
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you are not alone .. I have a friend who can pick up any firearm I own and shoot it with far better accuracy than I can achieve! Makes me feel like a proper twot! Still its nice to know its not my equipment —- just my shxtty shooting.

OP .. when you dry fire - do you notice any slide movement relative to the frame as you depress the trigger? Excessive slide play can influence your groups … as well as a trigger that doesnt suit you. I say ‘suit you’ as there are some pistol shooters with extraordinary forearm strength that can accommodate a very heavy trigger weight
 
Customer Service

If you need more assistance, our Customer Service team is here to help. CONTACT CUSTOMER SERVICE.

<https://us.glock.com/en/Customer-Service>
 
This may sound like a stupid question.... does the barrel have rifling?

I've actually seen a case where guns have been shipped out with smoothbore barrels (among other crazy stuff).

Worth a look for that or some other barrel anomaly.
 
rubberdonuts said:
Not many folks are actually proficient with Handguns to begin with so take that for what it’s worth. The glock 48 is a slimline designed for concealment for defensive situations. Data shows 21’ is the max distance you’d most likely ever have to take a shot which is what that pistol is good for. Next range trip make sure that target is not further than 7 yards and try again. 4-5 yards may be a good start. Don’t worry about what the guy/girl in the next bay thinks of you even if your target is at 3 yards. Consistency is what will get you results regardless of handgun. Focus on the fundamentals and figure out what grip serves your hand size best and run it. Shooting more than 150rounds in a training session is overkill. Load your mags 3-5rounds and practice reloads while your at it.
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please don't take this wrong, but there is so much fail in what you are saying here. I will give you that consistency is critical and that 150 rds is a good training session and that practicing reloads is important.
 
jimbo45 said:
Had same problem with my Gen 4 glock 22 updated trigger to a Gen 3 and it helped just turned out I really suck with a glock lol my buddy did say the trigger was ####ty and he owns half a dozen glocks
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how do you update a Gen 4 to a Gen 3? they arent compatible triggers
 
Lojak said:
...Does this sound like something a gunsmith can assist with?
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First, I'd do everything I could to rule out the shooters as the source of the problem. Maybe it sounds dumb, but we don't know your experience and history: Factory-spec Glocks are relatively difficult for most people to shoot accurately. Are your other Glocks all factory-spec? If not, find someone who can reliably produce tight groups at 10yds with a standard gen5 Glock trigger, and if they have the same issue then that probably tells you something. The best test, of course, is to shoot another stock G48 beside yours.

Mechanically, you can check a few easy things yourself: Look for evidence of leading in the bore, inspect crown and rifling, inspect contact area inside the slide close to the muzzle, swap barrels with another G48, swap slides with another G48, that sort of thing.
 
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