Quote Originally Posted by CodySPowell View Post
I use both. I prefer the 41's since they're specifically designed for semi auto. Harder cup to prevent slam fire. As far as performance, have not noticed a difference.
I'm in the same boat as Cody.
You would be surprise at the number of AR owners that don't know this fact.
I'm also still using some old data with CCI450 primers. Don't see any performance differences.