I've heard numerous horror stories about corelok, one being my own. When I was 21 I picked up my rem 30-06 figured rem gun why not rem ammo. Went to the local gun club for sight in days, they bore sighted it put me on 100 got it dialed it went to 200 couldn't hit the broad side of a barn went thru 2 boxes of shells. Old guy comes over asked if he could shoot it, Notta. Asks what I'm shooting told him corelok, he says eh those things are junk come back next week with Feds or winchester and we'll get you going. I've been shooting winchester ever since