Chamber dimensions drawing of Browning 45 70 (Sporter Version)

[.452dia]

Does anyone know where I can find a drawing of the chamber dimensions of Browning 1885 Hi Wall in 45 70 Cal., 28 inch barrel sporter version? I believe the are different from the Black Powder version.

[Nobade]

If anybody knows the answer it's this guy:
http://www.texas-mac.com/

[EDG]

If it is Browning it will have a standard SAAMI chamber.

The rifling and twist is different for the BPCR. So far as I know the chambers are the same.

But Wayne would be the final authority this side of Browning.

[.452dia]

Thanks Guys, I knew the rifling and twist were different but a friend said there were some other differences. I'll ask Wayne.
Thanks Again,
G