I mostly use 50- to 55-grain bullets. I've seen little difference in group size among several brands of bullet, although I mostly use Sierra boat-tails.
FWIW, it's a Ruger 77 Mk II light sporter that I bought around 15 years ago. 22", 1:10. I've never tweaked with the bedding at all. Replaced the tort-liability trigger with a Timney.
The silly thing doesn't seem to care what it's fed. Factory stuff, S&B GI-type, handloads...It has always been right at half-MOA for five shots from the bench.
You're from BATFE? Come right in! I use all your fine products!