10-08-2020, 12:18 AM
Sierra has said that they recommend that their bullets stay under 300,000 rpm to prevent any chance that the jackets fail. I normally run .224 x 75gr ELD's at 6.5:1 and 3,000 fps, which is about 330,000 rpm. I haven't had any issues. Eventually, if you were light enough, and had a high enough velocity, you might lose some rounds mid flight from jacket failure. Other than that, more spin can, as said above, effect your maximum achievable accuracy for benchrest type activities. I do not think a 6 arc is going to go fast enough to have any issues at 7.5:1.