Ruger 22/45 Mark 2

So I have a Mark 2 22/45, polymer grip and a Tactical Solutions upper on it and it used to run great, now it won't run a full mag without failing to feed. It seems like it might have something to do with the mags because it rams the bullet into the feedramp an locks up, like the angle is wrong, but I have 4 new mags and all do it equally with equal hatred all types of ammo I have tried. For what its worth it does seem to be worse with the can on it, any ideas?

You didn't lose the firing pin stop last time you cleaned it, did you? It's nothing more than a pin. If so and you pulled the trigger on an empty chamber, the firing pin may have nicked the chamber leaving a burr that's screwing up feeding.

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