My recollection of what the magazine articles said years ago was Winchester couldn’t duplicate 338 Win mag velocity and thus chose 325.
I like 338’s and at the time had 338-06 and 338 Win mag but wanted to try 338 WSM so had an 8400 Montana bored out. This was a year or two after 325 WSM introduced.
It shoots well and is sooo close to 338 Win mag velocity I am soon to sell my last 338 win mag. It is definitely a pretty big step up from 338-06. I don’t have my load book close so can’t quote velocity this evening.
