Quote Originally Posted by Parabuteo View Post
You do not need a canelure to crimp unless it is a roll crimp. We crimp match bullets for use in AR15s regularly which improves consistency. Lee are quite clear on thsi in their instructions that you do not need a canelured bullet.

That said IF the bullet has a canelure, I will adjust the die to crim into it.
I have a Lee factory crimp for the .223. I did some experiments with it and personally found no advantage accuracy-wise to crimping. It's an extra step and puts more stress into the brass. I've heard that it improves reliability cycling through rifles like the AR15, but that's not an issue with the type of rifle I have.

New expander button is on it's way, will update with results!

Cheers
Greg