Cartidge for Tikka 300 Win mag

[poly]

I just bought a Tikka T3 light in 300 Win Mag, and I'm going to try various loads to see what works best. I have Federal Premium with Barnes triple shock, and Nosler, but I'm wondering if someone knows what type of cartridge this gun might like the best. I typically shoot 180 gr., but I am open to suggestion. I use the gun almost exclusively for elk.