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AICS mag feeding problem in Rem 700 with chassis

devldogs55

Sergeant
Full Member
Minuteman
Feb 11, 2014
314
8
N. Idaho
This is the problem I'm experiencing with my Rem 700 .308 with XLR Element chassis and AICS 10rd mags. I have read through the AICS magazine threads, and searched for AICS mag modification threads, but only came up with one thread that didn't answer this question.

Has anyone ever had a need to slightly modify or smooth out the feed lips on AICS mags because it's difficult to chamber a round from the mag? The mag seems to fit perfectly and with no play, and the bolt doesn't hit the back of the mag when going forwards, but the tip of the bullet does not start to move up the feed ramp easily when it needs to, and forward pressure on the bolt seems to only deform the tip of the bullet and then finally go up the feed ramp and chamber after applying quite a bit of pressure on the bolt just to get the cartridge out of the magazine. I'll try to take some pictures tomorrow - or better yet, maybe even a video of what's going on. These magazines are not easy to find or inexpensive, so I am really hesitant to do anything to even slightly modify it. Will it "break in" over time and allow me to feed cartridges easier eventually?
 
I ended up working on them today and the problem seems to be fixed. I filed and polished the front quarter inch of the feed lips back so that it allows the cartridge to raise up earlier. Really only took a few minutes, and it feeds just fine now.
 
That would be nice if I could do it that way, but I'm gathering that there is probably enough people out there that if I borrowed a mag, it may very well be modified also. Also, modifying a mag is much less expensive than gunsmith work. I was only hesitant to modify the mag before I realized that it was a common problem.
 
I have a non modified AICS mag you can try, just to rule that out. I am local as well, if you wanted to meet up or I can ship it to you. I have had some mags with issues, some just feed better. Also, the height that the action sits in the chassis/stock in relation to the mag is critical. If it is hanging up in the mag, you can polish the underside of the feed lips with 1000 grit wet/dry sandpaper and some light oil. I would try another mag first, see what happens. I would hesitate doing any bending or physical mods to the mag without trying another one, if a second mag has the same issue, you have something more critical to figure out.
 
here is a pic of the proper relation to the bolt face and round for proper feeding

gun083-1.jpg