Re: Ruger M77 mark II 338 win mag?????
We bought my partners son the exact same rifle, and it's been a real accurate rifle. Accuracy wise it runs with our customs Edge's and RUM group wise, to about 500 yards, then it starts to spread. He can switch to our rifles and things tighten back up. We've been running the 225 Accubond in it, and I haven't set out to prove it, but I'm wondering if twist is an issue.
It's been a great hunting rifle, couple of moose, deer, and an Idaho Bighorn at about 400 yards. Great hunting rifle, but you are asking about long range hunting rifles. The 338 Winchester is a great cartridge, and should be capable of more, but for some reason this one rifle perplexes us.
I would like to quantify it more for you, but it's just a vague observation. He's in school not shooting much so we don't have a lot of motivation to run it down. Lighter faster bullets could resolve things also.