Specifications
Case type Rimless, bottleneck
Bullet diameter .330 in (8.4 mm)
Neck diameter .358 in (9.1 mm)
Shoulder diameter .436 in (11.1 mm)
Base diameter .464 in (11.8 mm)
Rim diameter .464 in (11.8 mm)
Case length 2.368 in (60.1 mm)
Overall length 3.349 in (85.1 mm)
Case capacity 69.1 gr H2O (4.48 cm3)

It is very close, a little bit shorter and lower capacity due to bullet dia. and smaller shoulder, .436" vs. .441" of the .338/06.