Been sitting here trying to recall if I've ever shot a Corelokt in my life and I don't think I ever have. I know I haven't used them since I started reloadingsome 7 or 8 years ago. Before that I used nothing but factory Federal Premiums with Nosler Partitions. I might have used them in the 70's when I first started shooting centerfire rifles, but I don't think so. At this point in time with all the excellent bullets out there I see no reason to start using themnow.