I started out using CCI primers ........I believe it was because all my equipment and loading data was RCBS/Speer/CCI and that's what they used. Besides they were easy to find and always worked quite well. I have used several other types and prefer Fed. 215M for my hunting loads in my .300 WM. Everything else still gets CCI, 200s, 250s and BR-4 s. I have never really done any significant accuracy testing to say one works better than another tho.............
Never ever had a 'primer' failure..........seated one upside down two weeks ago so that was my only failure...........first time in 30 years.
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