Is this normal wear on a SIG? (P226 ST 9mm, about 1200 rounds). I noted that it seems to have worn the left-side more than the right, peening it ever so-slightly. I have been told it is just wearing in tolerances that are .001" or so off or something, normal variance. Just curious if anyone else has noticed this on their sigs and if it stabalizes after a few hundred rounds or so?