Went to the range this last weekend for the second time with my new DPMS rifle. First time out was 2 months ago. 300 rds of wolf steel case/ no issues/jams at all. took it home cleaned it and put it away. took it out this time and first shot fired, case jam. cleared it, another jam, cleared it.. another jam. 3 shots 3 jams. Same ammo except for the last round was federal BTHP brass, As far as i can tell the extractor will not let the case go. No matter what i did i could not pry it out. finally i had to ease the case back into the barrel and just take the upper off and slide the bolt out. as soon as the bolt slides out the case just falls off.