I have used the 6.5 corlokts 140 grs. for several years now at max loads and never had a problem with them coming apart in a ruger mark11 in 260 cal.Not saying that you didn't.Have taken many deer with the corlokts with out any problems,I don't think they are cheap just think some of the other brands are over priced.
Question is,is the ones you are shooting have 2 conulures on them?
http://www.hunting-pictures.com/memb...ght&encore.jpg