Welcome. Love your avitar and your .sig. As for bullets, you've selected the 45cal and the best200 yard bullet is the 200g .40 SW with a 45cal sabot, the best 150-175 yard bullet iswithout a doubt the .40 BarnesMZ, signted in 3" high at 100, you would begood to go out to 150 to 175.
Best Wishes on your new rifle, they are a lot of fun to shoot and hunt with.
In Christ, the author and perfector of our faith,
Chap Gleason