fte with ptr 91
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seasmoke
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Couple of things to check...
If you have not already. Make sure the chamber flutes are good and clean.
Also, Give the extractor on the bolt-head a wiggle. If you can move it at all,
time for a new extractor spring.
If you have not already. Make sure the chamber flutes are good and clean.
Also, Give the extractor on the bolt-head a wiggle. If you can move it at all,
time for a new extractor spring.
There were a lot of PTRs that had problems with the flutes in the chamber not being quite up to HK spec. They are possibly very slight accuracy advantages to the tight chamber with reduced flutes but they can be very picky about ammo. Presumably the previous owner discovered this and sold the rifle for that reason.
You can either have it rebarreled or have the flutes re-cut.... If you do some searches there is significant discussion of this on a more HK centric forum.
PTR has just come out with a "GI" spec rifle that has barrel cut to HK spec with a lighter profle that will handle any ammo....... Some have interpreted this as "fixing" the problem without admiting there was a problem.
You can either have it rebarreled or have the flutes re-cut.... If you do some searches there is significant discussion of this on a more HK centric forum.
PTR has just come out with a "GI" spec rifle that has barrel cut to HK spec with a lighter profle that will handle any ammo....... Some have interpreted this as "fixing" the problem without admiting there was a problem.
Exactly what kind of ammo were you using? I am guessing that it was just the ammo.
Try some federal .308 from wally world and see if that cycles properly. I am guessing that it will.
I paid to have mine re-barreled. It was $250 or so and I was not planning on having to do that.
I will have to keep any eye out for those GI spec rifles from PTR. That is the first I heard of them.
Try some federal .308 from wally world and see if that cycles properly. I am guessing that it will.
I paid to have mine re-barreled. It was $250 or so and I was not planning on having to do that.
I will have to keep any eye out for those GI spec rifles from PTR. That is the first I heard of them.
what is the chamber flute?
is there a certain range of serial numbers that have this problem?
You really need to read up on the operation of HK firearms
Yes, but I couldn't tell you off the top of my head. If you do an internet search you can find out a lot on the HK centric forums.
NWCP
Member
Get ahold of a chamber flute cleaning brush and make sure the flutes aren't all filled with crud. With clean flutes the rifle should eject spent casings without the extractor. With everything operating the way HK intended the spent cases will cover a country mile upon ejection... well almost. Go to the HKPro website if you want to get schooled on HK91s and their various clones. Plenty of good information there specific to the rifle.
An easy test is to lube some rounds with something like Imperial Sizing Wax and see if the problem goes away. Cartridge lubrication was an alternative to a fluted chamber.
With delayed blowback guns, the extractor is rarely the problem since its main use is to manually remove rounds. A functional delayed blowback rifle will function without an extractor since there is enough residual chamber pressure to blow the empty case out. The case is pushing the bolt, the bolt is not pulling the case like in a gas operated gun.
Also, looking at the spent case will tell you a lot. The soot lines should go right up to the neck and be uniform. Other than slight deformation around the soot lines, the brass should be smooth.
With delayed blowback guns, the extractor is rarely the problem since its main use is to manually remove rounds. A functional delayed blowback rifle will function without an extractor since there is enough residual chamber pressure to blow the empty case out. The case is pushing the bolt, the bolt is not pulling the case like in a gas operated gun.
Also, looking at the spent case will tell you a lot. The soot lines should go right up to the neck and be uniform. Other than slight deformation around the soot lines, the brass should be smooth.
seasmoke
Member
Question for the OP
You write in your first post you are having 'fte' issues. Gotta clarify for me.
Do you mean FT-Eject or FT-Extract? Also as mentioned in an earier post,
read up on the RDB design.
Check.. http://www.militaryfirearm.com/Forum/forumdisplay.php?f=23
Also..http://www.weaponeer.net/forum/forum_topics.asp?FID=428&PN=1
Tons of info and some really good folk.
Cheers
You write in your first post you are having 'fte' issues. Gotta clarify for me.
Do you mean FT-Eject or FT-Extract? Also as mentioned in an earier post,
read up on the RDB design.
Check.. http://www.militaryfirearm.com/Forum/forumdisplay.php?f=23
Also..http://www.weaponeer.net/forum/forum_topics.asp?FID=428&PN=1
Tons of info and some really good folk.
Cheers
I think I mean failure to eject. When I shoot the gun, the bolt hardly moves back at all, and the spent casing is still stuck in the chamber.
Also, I was using mag tech ammo. After doing some research online, it seems many people have issues with this ammo in the ptr 91
seasmoke
Member
FT- Extract
Scrub that chamber with a chamber brush or 20ga bore brush and try some differant commercial ammo and let us know
Scrub that chamber with a chamber brush or 20ga bore brush and try some differant commercial ammo and let us know
WHOA!!!!!!!!!!!!!!!!!
First off, thanks to everyone for the input.
After doing some research, i cleaned the gun very well and I went and bought twenty rounds of wolf .308. (only twenty because I didn't want to spend a lot of money and have the gun still not work). I went to the range again today, and the gun shot like a champ! It had me bummed out that I didn't buy more ammo. Thanks again for the advice
First off, thanks to everyone for the input.
After doing some research, i cleaned the gun very well and I went and bought twenty rounds of wolf .308. (only twenty because I didn't want to spend a lot of money and have the gun still not work). I went to the range again today, and the gun shot like a champ! It had me bummed out that I didn't buy more ammo. Thanks again for the advice
NWCP
Member
Keep the chamber clean and you should have many happy years of sending .308 goodness downrange. Enjoy!
seasmoke
Member
Congrats avs
Glad your ptr is working for you Those CETME clones are great firearms(along with the HK/G3 and the HK-91..ect) They can be kinda spendy to feed though
My CETME loves this stuff...
http://www.aimsurplus.com/product.aspx?item=ATU308FMJ
Shoot safe
Glad your ptr is working for you
Those CETME clones are great firearms(along with the HK/G3 and the HK-91..ect) They can be kinda spendy to feed thoughMy CETME loves this stuff...
http://www.aimsurplus.com/product.aspx?item=ATU308FMJ
Shoot safe
Yep, they are ammo sensitive. The thing I was disappointed in is that I seemed to have read that pretty much any quality, modern production .308 will work. But, I also had problems with PRVI .308 not cycling properly.
So, my advice is to try a couple boxes of ammo before you stock up on it. My advice is to use Tula and Wolf for your cheap plinking ammo and then spend some time with the higher end ammo a couple boxes at a time to see what works for you.
It may seem like a lot of effort but given the price of ammo these days, it's worth it.
So, my advice is to try a couple boxes of ammo before you stock up on it. My advice is to use Tula and Wolf for your cheap plinking ammo and then spend some time with the higher end ammo a couple boxes at a time to see what works for you.
It may seem like a lot of effort but given the price of ammo these days, it's worth it.
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