My brand new 336 loves the Hornady 100 grain plinkers I load.
For factory, the Federal 125 grainers are amazing. They are a Sierra bullet (HP/FN). When the gongs were up on the 300 yard range, (of course using a solid rest, with no wind) 4 out of 6 were ringing the 10" gong with the factory sights.
As to my cast loads....I gotta buy a ladder sight for the rifle, but thanks to Barclay and others, they were spot on with the advice for the Lyman neck expander.
My rifle is plain, simple and beautiful!