CCI 41 or 400

[CodySPowell]

Anyone use these primers for their 223/556 reloads? Notice any difference?

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.

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[Benny]

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.