I am shooting a Ruger M77MKII in 300 Win Mag. It wears a Leupold VX III 2.5-8x36 scope (wanted the low end for wading into the alders when I lived in AK). Right now with handloads of 180, 200, and 208 grain bullets, it shoots right around 5/8-3/4" at 200 yards. While the trigger isn't the cleanest breaking trigger I have shot, I have worked with it and it breaks pretty decent at 2#. Wondering what it would take to double my comfortable range with this rifle? Right now I am confident out to 400 yards. Everything sits in one of Ruger's boat paddle stocks, I haven't made any changes other than some polishing and working with the trigger since I bought the rifle in 1999, still shoots pretty much the same size groups as it did new. I am on a limited budget, but I am curious. The 300 Win Mag is just about my favorite cartridge, followed by the 375 Ruger.