Here's a link to a page I've found helpful to ball-park my bullet selections. I say "ball-park" because I've found some ammo that worked well outside the limits suggested by the chart. http://www.ammoland.com/2008/11/29/b...-for-your-gun/
What matters isn't actually the weight, so much as the length of the bullet that will properly stabilize with your rifle's twist. But the bullet weight & length go hand-in-hand, so it's a useful equivalent.