Have you tried Berger bullets yet?
I only ask as I am now a BELIVER, after 15 years of towing the Nosler party line.
I bought a box of 60 gr 6mm (.243) bullets with a BC of .236 "just to try" on the yotes. I realise that you are shooting a .223, but they make them too.
I have to say the hype about Berger aint just hype..... My groups at 300yrds are now under 3.5" (from 5"), muzzle Velocity is up a just a hair (50fps ish), felt recoil is less (I can't tell ya why), bullet drop is less (instead of 1.5" high at 100 to be even at 300, I am now about 3/4" high at 300) on account of the lower BC. And I am using 1.1 grain less of powder.
Just putting it out there, some thing else to think about.....
Cheers