OK, maybe I cheated...
I started with the best components I could find:
H4350 Powder
Virgin Lapua Brass (.260)
Berger 140 gr Hybrid
Federal 210M Primers
and In This rifle: http://www.snipershide.com/shooting/firearms-sale/244158-wts-hamonds-built-260-a.html#post3059279
Loads per the...