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Small rifle primers CCI 450s vs CCI 400s for a 6BR
I use 450s in a large firing pin/unbushed bolt for the reasons mentioned above. My question is if you use a small pin/bushed bolt combo do you still need the thicker cups or will the 400 have enough support then?
I was always under the assumption that thicker cup small rifle primers were made to reduce slam fires in AR's. People choose to use them for others reasons such as higher pressures.