I think the qestion is not what you NEED, but what you WANT. Your .300 wsm
will kill a moose at 600 yards, which means that it will kill anything closer than that.
If you want a new .338 Lapua, buy a .338 Lapua. Personally, I woud buy a Savage Long Range Hunter .338 LM. I have seen them for UNDER a grand if you know where to look. Comes with the accutrigger, accustock, Karsten Cheeckpiece, muzzle brake
. Cant beat it.
You have my blessing... buy the Savage!