I'm absolutely sure you can rely on them, likely with none problems, but in the three hundred wm, I might Individually consider to locate some Federal GM215M primers, or large rifle magnum gold medal match primers, especially if you hunt in cold disorders. CCI Primers are continually tested and improved. https://z-ndh-tchen-large-rifle46790.ssnblog.com/30835814/the-definitive-guide-to-winchester-zündhütchen