[Doctor Stochastic]

Didn't Oswald use a 6.5mm?

What about a 6.35mm so as to come out exactly 1/4"?

[Shooter 2.5]

6.5 X 52 Italian[Mannlicher-Carcano]
162 Grain Round Nosed Bullet
2296 FPS
"Cartridges of the World" calls it a good deer, antelope or Black Bear cartidge.

The 6.5 X 55 Swedish Mauser is a much better Cartridge.