Modern Hunter feeding issues

E

Erickson5006

Regular
Rating - 100%
4   0   0
Location
Bonnyville Alberta
My ATRS modern Hunter can't seem to pick up a round correctly. The grooves that the bullet tip has to ride up are too wide and my FMJ and plastic tipped ammo just jams & scars like crazy. Are these things meant for blunt tipped rounds, or is something wrong?

Also, my bolt spring seems to be weak, and pressure from a loaded mag is enough to prevent the bolt from closing fully. I have to load the first round without a mag, but it'll pick up the next rounds when fired.

Any info will be appreciated
 
FMJ should be the most reliable to feed of any projectile type I would imagine.
If it's jamming up on FMJ/pointed cap projectiles then there is something bigger going wrong.

Did you try different magazines ie does the same problem persist no matter which magazines you use?
Some mags can sit too high when the mag catch is engaged.
If it only happens with one brand/or one specific magazine it could be as simple as the notch cut in the magazine is too low ie the top of the magazine is too high up in the mag well.
If it's with every single magazine you try regardless of brand etc then the rifle is likely the culprit.
Your bolt binding up as it rides over the top of a magazine to try and feed a cartridge could be a symptom of this as well.

My advice, first try another magazine or magazine brand and come back with more info/results of that test.
 
What mag you running? Gen 3 pmags are know to be unreliable in this platform. They can be modified to work though. Also is it a carbine length tube and buffer or could it be a rifle length with a carbine buffer.
 
I noticed that when trying to chamber the first round it would work better if instead of pushing the bolt release button if I pulled back the charging handle as far as it goes then release it, gives it a little more force to actually strip the round out of the mag and lock it into the chamber. You should also try lots of different mags and then you'll be able to find a couple that work best and stick with those.
 
Yep mags were AFSC, or something like that, came with the gin. And one was a new xcrm from Calgary shooting center.

The bolt dragging makes it seem like mag is too high, but the shells getting stuck in feed ramp make it seem like they are too low or should be angled upward?

I'll email ATRS once I get pictures, but I can't figure it out.

Hirtenberger fmj & Nosler 308 with the plastic tip both had identical issues.

And that is using the charging handle, and letting it fling forward
 
Well, after some more testing, my problems are 95% mag related. Something is holding the bolt back, and it often won't close fully when cycling by hand. Locking the bolt open and using the release to close it up seems to be reliable, but im also getting primer strikes doing this. Makes me worry a bit
 
Ammo is Hirtenberger nato, nosler E.T, and hornady whitetail with the plastic tip.

They are all getting scratched to hell by the feed ramp, and the brass is getting scarred by the bolt traveling over them when they're next in the mag.
 
Last edited:
Ammo is Hirtenberger nato, nosler E.T, and hornady whitetail with the plastic tip.

They are all getting scratched to hell by the feed ramp, and the brass is getting scarred by the bolt traveling over them when they're next in the mag.

The rounds in the mag seem to be pushing up hard enough to bind the bolt.

I guess that I'll try to file the mag cut outs a little. Maybe sitting a hair lower will give the rounds a better angle of attack on the ramps

And I havent touched the pmags yet.
 
How much lube are using? The modern hunters seem to need lots of lube to operate properly. Also have you tried only putting 3-4 rounds in a 5 round magazine or 7-8 in a 10 round magazine to see if that makes it work better?
 
I didnt give it much oil, wiped it clean with a shop towel and then with a lightly oiled rag. A single round in the mag seems to work flawlessly, but 2 rounds and I can sometimes feel it hang up. And I don't wanna oil the feed ramps between mags; I hope that I don't have to treat it like a CZ.
 
Erickson5006 said:
I didnt give it much oil, wiped it clean with a shop towel and then with a lightly oiled rag. A single round in the mag seems to work flawlessly, but 2 rounds and I can sometimes feel it hang up. And I don't wanna oil the feed ramps between mags; I hope that I don't have to treat it like a CZ.
Click to expand...

Next time you go out try running it really wet. I sold one of my modern hunters to someone that I never had problems with as soon as he owned it he had reliability issues it wouldn’t feed at all. The fix was just to lube it how I sent it and now it works fine. I don’t lube the feed ramps but all moving part. I guess after a few hundred rounds it is supposed break in and require less lubricant but I haven’t shot mine enough yet.
 
Put an empty magazine in the rifle and while holding the bolt release cycle the action, if you feel it dragging on the magazine you should be able to see where it's hitting and just modify your magazine slightly to give it clearance.

Did you buy the rifle new or used? If it's not a new production rifle has it been sent back to ATRS for the updates? If you call ATRS and give them the serial number they can tell you if it's been updated.

Having it hard to strip the first round from a tight magazine is normal, lock the bolt back and press the bolt release, if it doesn't strip a round you need to modify your magazines or buy new ones. After the magazine is fully loaded you should be able to push another cartridge about half way before it actually bottoms out the follower or spring, if it's tight to get the last round into the magazine you will have issues unless you modify the magazine.
Stripping the first round has nothing to do with your action spring, that spring strength should be matched to catch the bolt carrier and return it home, it should only be replaced with a heavier spring if you feel that the carrier is slamming into the rear of the extension excessively hard, if you put in a stronger spring you will likely cause reliability issues as it may start to short stroke (depending on ammo).

Erickson5006 said:
I didnt give it much oil, wiped it clean with a shop towel and then with a lightly oiled rag. A single round in the mag seems to work flawlessly, but 2 rounds and I can sometimes feel it hang up. And I don't wanna oil the feed ramps between mags; I hope that I don't have to treat it like a CZ.
Click to expand...

NOT ENOUGH!!!

I have a great idea for you, go on the ATRS page and actually read up on what the manufacturer recommends for ammo and lubrication. The Modern Hunter is not at all like a Russian or Chinese army surplus rifle, you can not expect to treat it like one and have it function correctly.
Why would you ever have to lube feed ramps? Any rifle that requires you to do that has serious issues and should be looked at by a competent gunsmith. What you are experiencing is a magazine issue not a rifle issue.

https://www.albertatacticalrifle.com/modern-hunter

If you want to know how to clean and lubricate your rifle correctly read the AR-15 cleaning and lube thread. Not the same rifle but close enough that as long as you can take your rifle apart the rest will work for you.
https://www.canadiangunnutz.com/forum/showthread.php/523308-AR15-Lubrication-and-cleaning-thread
 
Last edited:
Cleaned it again and oiled the hell out of it and it worked better with A.S.C. mags, and now feeds fine from C.products mags. I was told that the scratches on the bullet from the feed ramp arent deep enough to effect it; but I might still polish feed ramps.

But not enough oil, and grime from Hirtenbirger nato rounds were to blame. Those things are very dirty. Cleaned the RFB also, and the grime was thick
 
You must log in or register to reply here.
Back
Top Bottom