Re: Savage 338 questions, Attn Gunsmiths
The 338 Lapua is a very good cartridge. the 338 RUM has a slight "Edge" in case capacity over the Lapua But the 300/338 RUM (338 Edge) has it beat by a large margin.
So If you are looking for velocity the Edge has the upper hand in velocity without excessive pressures.
The Lapua cases are great and will take more pressure without case failure than most other cases.
I would base the selection on what bullet you want to use. If it is a 300 grain, I would chose the Edge.
If the bullet you like is 250 grains or less I would chose the 338 RUM.
If you had a custom action or a Mark 5 Weatherby with the larger bolt then I would probably
go with the 30/338 Lapua or the 338 Lapua.
I know this is not very much help but maybe it will give you something to think about.
J E CUSTOM