I handload for most my shooting needs but in general I have found both Federal Premium and Hornady Customs the best OTC ammo interms of groups IME.

As far as bulletsbeen pretty partial to Nosler offerings but Hornady have always worked when I took them to the field.

Ballistic tables...well lets just say you need salt with most of them. I agree no way to determine what they'll do until you shoot and verify them in your rifle (s).

I say their worth a try if your looking to improve on your current load. Tinkering is part of the fun as it gets you out shooting, which is never a bad thing!!

Good Luck