I am absolutely sure you might make use of them, almost certainly with no issues, but inside a 300 wm, I'd personally test to locate some Federal GM215M primers, or large rifle magnum gold medal match primers, especially if you hunt in chilly problems. I have employed BR-two's in 7mm https://ccibr2zndhtchen62692.thelateblog.com/32062062/not-known-facts-about-vectan-pulver