.260 Rem Neck Testing Results

TechShooter has been campaigning a 260 AI with great success. At the Cascade 600-yard range, he recently shot a 600-34X using the new 130-grain Bergers. However, like this editor before him, TechShooter has had signficant issues with doughnuts forming in necked-up Lapua .243 Win brass. In the hopes of avoiding the doughnut problem altogether, TechShooter has been testing Remington 260 brass. Chris reports: “I didn’t like the hassle of the inside neck-reaming the Lapua brass, as well as the possibility that this process could cause excessive runout. I measured the neck-wall thickness variation of Remington brass using the test fixture shown below. Only those cases that were under .0015″ total variation were selected, the rest were set aside. Only about 15 brass of the 500 were outside this tolerance, with the vast majority under .001″.” Chris concluded, and we agree, that the Rem brass is a viable alternative for .260 Rem or .260 AI shooters. Chris tells us: “I am using the Remington brass exclusively now. The Remington brass is of very good quality, at least the batch of 500 that I just got.”