Graf's & Son's usually has Winchester and Federal brass for the 223wssm.
For my son's Browning, I like RL19 and H4831sc under a 60gr Btip. Fast and accurate.
Other good powders include 4350, 4064, RL17, Varget. RL17 was made for the wssm/wsm line. I'd also look at Hybrid 100V.
My son used a 60gr Vamx @ 3,700+fps for 2 years. Very accurate, but it left some big holes and we had some splash wounds, so he switched to Nosler 60gr Btip.
The 60gr Vmax liked RL19 and the 60gr Btip likes H4831sc.