Hello all , I am noticing a small problem lately . My .22 cal. revolvers seem to be having trouble expelling the empty brass after just a few cylinders have been fired . Now a few yrs. ago I never had any trouble . I clean them after every range outing , do you think it could be the ammo , doesn't mater what brand I use , it all seems to do it though. I do clean the cylinder bore with a .22 cal . bore brush mounted on my hand drill ;same kind of brass brush I would clean the barrel bore with . I don't use the drill on the barrel or even the same brush. what do you think to aggressive for cleaning the the cylinder bores , dirty ammo . Thanks Greg