My Hornady that came with my starter set has been giving me fits as of late. With flake powder, on bad days I am +-.2 grains. Then, it (me?) will turn around and throw bang on the next night. I was thinking of taking it down again and polishing the charge cavity and adjustment screw surface to try and eliminate the chance that I might be getting some powder hung up in there somewhere.
I have had mixed results with "the flick", but I'm sure it can't hurt. The stuff I have been loading is run of the mill pistol loads, so that, coupled with my less than awesome abilities, make for an acceptable load I guess. I'm no where near an over or under charge scenario, but striving for perfection is still desirable.