A friend of mine shoots Federal 165gr. tSX factory ammo in his RP .30/06- 5/8" for 2 consectutive 3 shot groups at 100 meters. Incredible - the Federal 165 Fusions which he uses for practise, same poi, shoot 3/8" - and worked for deer, and sheep - while he used the TSX for elk - all same fall.
I watched him shoot a 3 shot group of 1 1/2" at 234yards with the TSX.

Says to me, Fed factory ammo is pretty good.
Personally, I'd handload, of course - or start. It's really expensive to shoot factory, even more so if you're shooting solid copper factory ammo.

The ammo prices are usually higher that what box of 50 bullets costs and you only get 20.

Usually the more the ammo costs, the less shooting a guy does - when the direct opposite should be happening - more shooting, especially with a DR.