Originally Posted by
toccopola
no didn't rest the barrel on nothing but air. seems like if the cyl. was out of time a little the firing pin would show that by striking off center of the rim. I think more practice and trying different ammo is the key. I have a few other rugers and can do very good with them. A couple autos and a 44 i hunt with, it does good out to about 25 yards on deer and hogs.
If it was out of ALIGNMENT, it could show 'off edge' pin strikes, but not necessarily always so far off that it would misfire or that you'd notice. Timing has nothing to do with alignment. We took an unfortunate left turn at Albuquerque in this thread, timing wasn't ever a possible problem.
Try out some different ammo. If none give suitable results, send it back to Ruger. You'll need to be sure to send it with the correct cylinder, since you now have 3, because they won't work on it if it's marked (or the serial number references it to be) a 22lr and you send it with a 22mag cylinder.
How does your bore look, including the forcing cone? Might throw some lead and/or copper solvent down the bore, let it soak, then give it a good brush out.