What gas setting are you using?
I had the exact same problem a few times in one range session with my first XCR. The only way I got the bolt back was to remove the barrel. The problem has never rematerialized. Did you ever figure out what caused it?NakedGOBLin, I BOUGHT my XCR 8/2/07. I took it to the range the next day with 12-30 round clips fully loaded @ 360 rounds for break in. First clip I sighted in the irons. After about 100 rounds I had 2 feed jams as you described on your day 1. I COULD NOT get the bolt to pull back with the handel,there was enough room to place a screw driver between the bolt & the receiver & pry the bolt back to free the bullet. The rest of the rounds no problem. Range time 2 hours, would have been 1 hour without sight in & jams. Let us know what RA comes up with. Thanks. T.S.