I am a big fan of the TTSX by Barnes.
However, if you do not want to load them yourself
I would suggest you give the Remington Premier Accutip in .55 grain a try. I have 3 different rifles that all shoot 1 ragged hole groups with them. I also use the 50 grain in my .22-250.
It is amazing the knock down power they have.
I buy the .223 Remington Premier Accutip at Target Sports USA for $12 per box of 20. I buy them by the case.
