Derya TM22 help please

[theplanefxr]

Hi all,

I have a TM22 that I picked up earlier this year. Ran flawlessly for about 500rds. Lately been having alot of feed problems. Tried different ammo, the loonie buttock “fix” and after two or three mags it begins to be problematic at the range again.

Always seems to be an eject/feed issue. With stovepiping and or spent case jamming in various ways in the action.

Yes the gun is clean, the bolt and extractors are in good condition and no burrs, yes lubed up

Ammo that was non issue Winchester M-22,
CCI clean, CCI veloster all fed like crap 1-2 shots, federal Champion is better 8-9shots but as the gun is shot more it begins to be problematic.

Frustrating at the range, your help is appreciated.

 

[broadhead67]

If it ran and quit does it just need a good clean?

 

[theplanefxr]

If it ran and quit does it just need a good clean?

I cleaned it before the range today. Fouled on first mag.. the rifle is clean. Full strip down

 

[joemanco]

Always seems to be an eject/feed issue. With stovepiping and or spent case jamming in various ways in the action.

Sounds familiar, frustrating. Guessing you've already polished chamber and feedramp?

Are both extractors springs of similar tension?
Is the ejector aligned correctly or has it drifted / bent / burred?
Is your action more reliable with the trigger kept down (maintain follow through) rather than rapid release (slapping)?
Is your magazine follower still in good shape, or has the bolt-stop-rear worn away?
Which round in the magazine is most unreliable? Is the magazine inserting / seating to same depth reliably?
Are the top receiver bolts tight (these tend to back out)?
Are you running the OEM charging handle?

 

[KyleSchenk]

Check your mags. Clean them and make sure the followers move freely. With just the follower inserted, it should move from top to bottom of the mag with very little resistance. You may need to shave off some on the sides with a razor blade if it's rubbing. Hold the blade perpendicular to the follower an drag it back with very slight pressure applied.Also look at the feed ramp. It may need polishing. I've also personally encountered springs that are really stuff and cause short stroking. First thing I'd check is the mag followers. If things don't improve after checking the followers, get in touch with O'Dell engineering and send it back for warranty.

 

[theplanefxr]

Check your mags. Clean them and make sure the followers move freely. With just the follower inserted, it should move from top to bottom of the mag with very little resistance. You may need to shave off some on the sides with a razor blade if it's rubbing. Hold the blade perpendicular to the follower a drag it back with very slight pressure applied.Also look at the feed ramp. It may need polishing. I've also personally encountered springs that are really stuff and cause short stroking. First thing I'd check is the mag followers. If things don't improve after checking the followers, get in touch with O'Dell engineering and send it back for warranty.

I’ll attack the mag followers tomorrow and try again. Thanks

 

[theplanefxr]

Sounds familiar, frustrating. Guessing you've already polished chamber and feedramp?

Are both extractors springs of similar tension?
Is the ejector aligned correctly or has it drifted / bent / burred?
Is your action more reliable with the trigger kept down (maintain follow through) rather than rapid release (slapping)?
Is your magazine follower still in good shape, or has the bolt-stop-rear worn away?
Which round in the magazine is most unreliable? Is the magazine inserting / seating to same depth reliably?
Are the top receiver bolts tight (these tend to back out)?
Are you running the OEM charging handle?

OEM Charge handle
Going to check the mags again tomorrow for cleaning and inspection.

Extractor springs, the eject port side is stiffer and different length, confirmed this is correct with Derya support. No burs, and aligned correctly from what I can see.

I suppose a polish to the ramp and chamber will be an improvement. I usually do this with my center fires…

Trigger kept down, I will have to pay more attention to this and report back.

First round is most reliable, typically 60-70% reliability from all mags. Usually shot 2 or 3 is when it is problematic again after initial round is chambered.

I appreciate your help.

 

[smelly pete]

Had the same problem, tried the same fixes. Decided that 2 extractors is one too many. Removed the one on the left side. No more problems. Plus now it's more aerodynamic and I have free spare parts.
Weird issue though, no signs of wear or peening, no carbon ring, just empty cases getting munched by the bolt, while it desperately tried to chamber the next round.
Edit: Working hypothesis is uneven spring wear causing uneven extraction. Ran flawless through a Speed Steel match.

 

[joemanco]

Decided that 2 extractors is one too many. Removed the one on the left side

Thanks for this, will give this a try for sure.

 

[Meroh]

OEM Charge handle
Going to check the mags again tomorrow for cleaning and inspection.

Extractor springs, the eject port side is stiffer and different length, confirmed this is correct with Derya support. No burs, and aligned correctly from what I can see.

I suppose a polish to the ramp and chamber will be an improvement. I usually do this with my center fires…

Trigger kept down, I will have to pay more attention to this and report back.

First round is most reliable, typically 60-70% reliability from all mags. Usually shot 2 or 3 is when it is problematic again after initial round is chambered.

I appreciate your help.

In the images you attached, the springs look similar in size but different in structure (more and less, heavier and lighter); just fishing here, but are you putting the right springs back where they go?

 

[theplanefxr]

In the images you attached, the springs look similar in size but different in structure (more and less, heavier and lighter); just fishing here, but are you putting the right springs back where they go?

Good morning,

Yes I agree they are different tension light vs heavy, and I confirmed with Derya the proper location on reassembly.

 

[theplanefxr]

Had the same problem, tried the same fixes. Decided that 2 extractors is one too many. Removed the one on the left side. No more problems. Plus now it's more aerodynamic and I have free spare parts.
Weird issue though, no signs of wear or peening, no carbon ring, just empty cases getting munched by the bolt, while it desperately tried to chamber the next round.
Edit: Working hypothesis is uneven spring wear causing uneven extraction. Ran flawless through a Speed Steel match.

Gonna give this a try if the mags don’t seem to be my fix. Thank you.

 

[smelly pete]

Thanks for this, will give this a try for sure.

Gonna give this a try if the mags don’t seem to be my fix. Thank you.

You're welcome; one part I liked about this fix is that you can try it at the range, just bring your top rail Allen key and a punch for the extractor pin. Sucks to MacGyver at home and have a problem on the line. Good luck!

 

[joemanco]

I appreciate your help.

Hey ... I noticed on on image #8375 the plastic buffer (white) ... this looks back to front to me?

Small end goes through receiver (poking through hole towards bolt).
Large end goes towards stock. Then rubber disc and "$1" fix.
Then buffer tube and stock.

 

[theplanefxr]

Hey ... I noticed on on image #8375 the plastic buffer (white) ... this looks back to front to me?

Small end goes through receiver (poking through hole towards bolt).
Large end goes towards stock. Then rubber disc and "$1" fix.
Then buffer tube and stock.

Did confirm that it is assembled correctly after the $1 fix, it would be hard pressed to get that buffer in backwards but was worth a look. I have it torn down on the bench today hoping to find some answers or to try solutions. My range is 10min away thankfully

 

[theplanefxr]

Hey ... I noticed on on image #8375 the plastic buffer (white) ... this looks back to front to me?

Small end goes through receiver (poking through hole towards bolt).
Large end goes towards stock. Then rubber disc and "$1" fix.
Then buffer tube and stock.

Not sure why I took the photos in that position I can see how it would be misleading. Good eye.

 

[joemanco]

You're welcome; one part I liked about this fix is that you can try it at the range, just bring your top rail Allen key and a punch for the extractor pin. Sucks to MacGyver at home and have a problem on the line. Good luck!

I removed the left extractor (punch pin from below bolt) and went to the range today to test. 100% success rate on a bulk box of Federal Automatch. I was previously running at ~8% failure rate on this and more expensive ammo.

Reliable and fun, plus I have a spare extractor and pin. Thank you again.

 

[smelly pete]

100% success rate on a bulk box of Federal Automatch. I was previously running at ~8% failure rate on this and more expensive ammo.

Reliable and fun, plus I have a spare extractor and pin. Thank you again.

Cool! Yay spare parts! And a functional firearm with an easy fix. Curious to hear how many others this problem happens with, and if pulling extractors continues to work.

 

[wolf300H&H]

Tagged for when ever i get using my derya heavy.