Hi there, new to the forum, glad to be aboard..

I have a 15-22pc that I'm having a sporadic problem with, that being I get an occasional round jamming in my magazines. This is happening randomly across a half dozen 10-round mags, 99.9 % of the time it's on the last round. The cartridge gets jammed vertically by the rim in the front sidewalls of the mag ahead of the follower and has to be wrestled out back towards the loading notch.

This is happening equally with minimags, fed champ bulk, and cci tactical. Looking at all the mags I see the faint grooves being carved in the mag walls by the jammed rims, so it's not a case of one or a couple out of the 6 mags doing it. Last session at the range I had at least 8 of these jams out of 300 rounds give or take.

Has anyone experienced this, or have any insight as to what might be going on?

thanks,
Dave

I know some people have had issues loading the magazine, I think it comes from pulling the load assist down and dropping the ammo in as opposed to using it to assist in one at a time loading and letting the ammo stagger properly.

This seems to be the cause of most feed/magazine malfunctions.

Want to make sure I'm visualizing this right. The jam is happening on the last round, and it is standing up but pushed to the front of the mag. If so kinda sounds like too much pressure on the follower maybe. I had one mag that was worn out slightly on the front tips of the mag. When I would load sometime the round I just put in would stand up. I fixed by heating a small flat head and slowly remolding the lips. But if it is happening with all mags dunno.

Thanks for the replies..

Juvicator, correct, last round standing up vertically (ala 'stovepipe') and pushed forward in the mag, which could be due to the fact I don't see the failure and pull the trigger (I hear the firing pin go and also get a nice dent in the side of the case from either the bolt or the pin).

I do only push the load assist down enough to place 1 round in at a time, under slight follower tension, into the mag, and I also stagger them and verify that there is a stagger after loading and that all cartridge rims are fully seated to the back of the mag.

I was also thinking that maybe it's too much mag spring pressure; I've had this issue with recent repro mags for an old winchester bolt .22 that would not chamber initially until I let the mags set for a couple weeks fully loaded and then they worked like a champ. But, I've also done this with all these mags, for about 10-12 days total so far, and still getting the jams.

I have also had some failure to chamber, where the shell is only slightly chambered and bent at the bullet/case junction, but maybe only about 5 out of ~800 rounds so far. Ramp and chamber are both clean and burr free, fwiw. Just got this a few weeks ago, and the store had just got it in the day before..

It's not a show-stopper, but if I could eliminate it I sure would like to..

Other than that, this thing is lots-o fun for sure, really liking it so far..

thanks,
Dave

I would get some snap caps and manualy try and make it happen. Just load them and see if the last round is getting too much oomph from the spring.

I find it highly unlikely that the springs on every magazine are bad/too strong. I find it also unlikely that the feed lips on all mags are deformed or out of alignment. I think there's something else at work.

Are you holding the mag as a forward handgrip or placing backward pressure on the mag? It has been reported that doing can affect the feeding of the last round and bolt lock back.

My teenage daughter had that exact same problem when she shot my rifle, but when I shot right after her I didn't have any problems.

Since the jam happend on her last five magazine loads after shooting over 400 rounds, I chalked it up to the way she might have been holding the rifle or if she wasn't releasing the trigger all the way because she was getting pretty tired.

No, the mag is always unhindered by everything but gravity. Happens equally by resting quad rail on a beanbag, resting forward vertical grip on padded surface, offhand holding vertical grip and offhand holding lower quad rail.

If anyone sees anything wrong in my mag loading description above, or has some other method/wisdom related to that, I'm all ears.

thanks,
Dave

I just saw you mentioned the 10 rnd mags. I have two, will give them a good using and see what happens. I think I've only used them a couple of times with no issue. Guessing you live in a Mag limited state...

I'm running of ideas except to repeat that with every magazine affected, it has got to be operator-related in some way, but I don't know what.