Re: Hello from new member...
Welcome , you could also give some Black Hills ammo a try , they make a 190gr Sierra Match King load for the 300Win mag that shoots well in all the 300 Wins I have had or worked with. And the 190SMK isin't a bad deer bullet either.
You could do some syple tricks to your gun that'll probably help out with the accuracy , things like bedding the action , floating the barrel , working the trigger and adjusting the stockto fit you correctly , the last one being a big help in shooting long range , alot of folks don't apperciate how much a good fitting gun will help their accuracy , especialy in field shooting
Si Vis Pacem Parabellum