I’ve found a strange, but repeatable, phenomenon with virtually every 300 Win Mag I’ve ever had/shot. I have noted that IF it doesn’t like a 180 grain bullet, it’ll probably like both 165 & 200 grain bullets. And vice versa. No idea why, but I always start with my 180 grain accuracy loads and don’t sweat it if she doesn’t show a preference for it.....I’ll just start loading 165’s or 200’s and she’ll probably like those two options. Never saw this in any other calibers I’ve owned.
My one exception is the Carolina Precision Rifles 300Win I had made over the summer. 700 action and a Bartlein 5R 10 twist barrel. So far this rifle loves everything I’ve shot. 0.2”-0.3” 4 shot groups at 100. Probably stick with 165 AB’s and see what happens.
