Anybody use the smaller 338s here? I've been doing an 'academic' / paper exercise on the 338 Federal for a quite different purpose, but was struck by its high (internal ballistics) efficiency, and that it seems a very interesting little cartridge, albeit pushed to its case capacity limits with most loads routinely compressed. Lots of good bullets including non-lead core varieties. At boar type ranges (and a fair bit further), external ballistics are very close to 308 in terms of trajectory, in a different order to designs like 45-70.
It's nothing more or less than a 338-08, a 308 Win case necked up to 338. It's the 21st century answer to the loss of obsolete American heavy woods game numbers like 348 WCF, but designed around the modern short-action rifle and magazine with a SAAMI max COAL of 2.820". For another 150-200 fps and a more comfortable charge to case capacity fit, there is the 338-06 A-Square, a SAAMI regulated version of necked-up 30-06 wildcats that go back to the 333 OKH which used the then prevalent 0.333" bullets before the 338 Winchester Magnum came on the scene, and was developed by Charles O'Neill, Elmer Keith and Don Hopkins in the 1940s.