I recently picked up a MINT condition etek 3am. The lpr is flush the dwell is set at 9 and it keeps breaking sterling Mace in the breach, my etek is the only gun that does it, I've tried the paint and my rotor on a Pmr an axe a mini and a rail, all of those shoot the paint fine, I thought dwell might be an issue to be softer on paint will I put the dwell up or down? What's the best way to cure this problem?