I can't speak for the 6.5 284, but I've loaded tons of .264 and have never had any seating issues. I've loaded and shot SGK's, Corelokts, Nosler Partitions, Barnes XLC's, etc, and contrary to popular belief, I've never seen any abnormal barrel wear. I do provide a brief cool down between shots, and I can put all of them through the same hole at 100 yds. I firmly believe that Remington put out the bad PR regarding the .264 as a barrel burner, but obviously have no proof. As for me, the .264 Win Mag is my favorite, but I'm always open to suggestions for something better. I plan on having Kirby build me something special this year and I have a feeling that he will produce something that will get my attention! Thanks....