There is one important factor you must consider and that is barrel twist .
1-10 to 1-12 60-ish gr and lower
1-9 to 1-7 50gr and higher
The next thing I'd ask is what kind of accuracy are you wanting and what is your budget ?
Federal gold metal match is great ammo and cost .80c to $1.20 a shot . I would get at least one box of this stuff and see what your rifle can do . You then can try other brands that are cheaper and you will have an idea what kind of accuracy your rifle is capable of to compare the cheaper stuff too.
http://www.targetsportsusa.com/p-319...mmunition.aspx