Bjorn Wrote:Rims were on. Used a cleaning rod to extract.
Clean your chamber good and then remove your upper from your lower. Lightly push a factory cartridge in your clean chamber and then point the end of the barrel up. Your cartridge should fall out or stick very little. If the cartridge sticks then you may have a chamber or head space problem. I would also check to see if your extractor has the o-ring installed. Remove the O-ring if it does and see if this helps. I have seen the O-ring create feeding and extraction problems with Grendel bolts..