I was looking at the AMMOMAN.COm website and was thinking about buying 1000 or so rounds. From what I understand (please correct newbie if wrong), this is pretty good ammo.  But then I hear I might have extraction problems because the chamber is tight on Olys. So far I've only shot about 250 rds of Georgia Arms G223B-2, which I think are remanufactured, with no problems at all. I was just looking to get away from reloads. Any advice?  

Nope.  Israeli made, it's the good stuff.