I'm sure this is a simple oring issue in the core, but I'm having zero luck fixing it. My gun has a 2.0 bolt and board. It shoots fine but will fire a very weak shot every once in a while. Normally at 290, it will slip out a 210 here and there. Sometimes it won't even get the ball out of the barrel. I read stickies but had no luck. Increasing my dwell from 12 to 14 helped a bit. Thanks.