longbarrel
WKR
Elmer Keith's last .338 development was the .338-378KT which had a slightly shortened .378 Wby case. He felt that with powders available at that time, the full length case was a bit too big. These days, it is just right, so long as you use a "real" barrel meaning at least 31" to burn all the slow powder. IMO the full length .338-378 is the ultimate elk rifle.