After a few hundred shots, the dieseling seems to have stopped. Last I checked, there is no smoke in the barrel after a shot. On a side note, the gun seems to be a lot more hold sensitive than it was before. At first I thought the gun didn't like meisters anymore, because they were grouping over an inch at 15 yards, then I tried an ultralight hold, I used to grasp the gun, but I tried to isolate myself from the gun as much as possible and I was stacking pellet upon pellet. Need to do somore testing to find out the best, most consistant hold for me.