So I went out @ 0700 in 36 Degree weather to test fire and finish (laser boresighters rock) sighting in the AR.
I was only able to get through two mags befor work called and I had to go make money
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Mag 1 was a USGI 30 rounder loaded with Winchester Q3131A. Out of 30 rounds I had 2 Failer to Feeds. Both where a bolt over stopage. (Bolt over the round being chambered, round partially in mag and on feed ramps.) once cleared all where fired and extracted normally. Rounds where impacting high from POA
Mag 2 was an Orlite 30 loaded with the old lacqure wolf. Same results as above except I had 4 FTF however ; those numbers are probably inflated as I was trying to induce them by applying pressure both for and aft of the magazine while fireing. Rounds where not as high as the Winchester.
I believe these failures are being caused by the magazine haveing to much play (inline with the barrel) I have been unable to reproduce this jam by manually cycling the action unless I slowly let the bolt move forward while aplying pressure to the front of the magazine.