Originally Posted by Buttermilk
Thanks for the replies.
I was curious about any accuracy advantage, since the reputation of the 30-338 indicates it may have a slight advantage.
A longer neck would be even better.
I'm a bit surprised that some would prefer the 300 WM. Is it the case forming?
I've had 300mag and 30-338mag build by same gunsmith as I wanted to expand and shoot more 30 cal mag also had 300Wby build.
I never found one that shoot better than the other as to accuracy. I think with the 300mag you can buy cases and just about every gunsmith has reamer vs someone what wants to build 30-338mag and doesn't mind going thru the extra steps.
If you look at that record setting group 1000yd in 300WSM it has neck length less and bullet dia so maybe longer neck have no advantage.
Since I've down sized the last few years I've given nephew most of 300mag/300WSM I had build he's not into forming cases so I kept the 30-338mag's. You can always get into a debate