I use LC brass almost exclusively.If once fired I swage the primer pockets with a Dillon Swager. I don't feel right cutting out metal with a chamfering tool. Most times I buy LC brass that is once fired sized, swaged, tumbled and primed from Top Brass in Salida Colorado. I have some with 10 or more loadings that I run in my NM AR. I full length size with a Redding S die to .004 neck tension. I get no bullet set back in rapid fire strings. I never neck size as it leaves to much bullet runout because the case is not tight in the neck die.
