9.3, my Brenneke is in 7 X 64....with a 28 inch barrel!!! I bought a pair that were war trophies from the nephew of the gentleman who brought them home. The one I wanted was a Haenel/Rasch 1890 in 9 X 57 but I had to take them both. When I saw what the other was, the Brenneke, and examined it I decided to keep them both. Both rifles have quite nice pieces of lumber, I was surprised. They also were slathered with varnish, everywhere, wood, metal, on the barrels....they were pretty yucky but, I guess all that varnish preserved them for 70 years. Once I got them cleaned up and refinished they're pretty nice.