Ruger M77MKII 300 Win Mag with 208gr A-Max

[AKBman]

I am looking for some loads, in particular has anyone used IMR7828SSC? I have been loading this bullet in RP cases with 72grs of 7828, wondering if I am safe to bump that up by a grain. I am also interested in what others have found to be most accurate?

[diriel]

You should be good up to around 75ish, maybe more. Hard to get too much IMR7828ssc into a 300wm case. I mean you can show pressure, but I have never managed to get so much I had problems with extraction or anything like that. Take that with a grain of salt, as the chamber on the 300 I load for is a fairly loose one, with a lot of freebore.

Just work up slowly in half grain increments, and you should be fine as long as you are paying attention.

Have a good one,
Gary

[AKBman]

Thank you sir.