I got the AO 1911a1 repro WWII Pistol a few months ago, as the price was right for NIB. When I got it the frame and slide hade a nice tight fit. Now after I say 600 rounds, theres some play (IE can pull up on front of slide and will pull up from frame a lil bit). Its this a safety issue I should call AO or normal wear and tear for a pistol breaking in?