I've been shooting my version of the 30/338 LM Improved called the 300 WAMBOMAG for 15 years, it has a 35* shoulder pushed back .060" to get a slightly longer neck.
With a 31" barrel it pushes the JLK 210 VLD'S out at 3250 fps using 93grs of Retumbo.
It's the only load I've used because it so...