1861 Springfield Question

[Springfeld]

Hello, I've looked over the net a few times and can't seem to find this question. I may have overlooked, but if any know knows or can help feel free to. What are the Outer-diameter measurements on a Original 1861 Springfield barrel at the Breech and Muzzle?

 

[JeffG]

I know little about the 1861, however I found the bayonet measurements(over the muzzle) maybe this will help.
M1855 - .58 caliber
Blade length: 18
Socket length: 3
Blade width: 25/32
Shank length: 1 1/4
Socket front OD: 29/32
Socket front ID: 25/32

https://civilwartalk.com/threads/sp...the-measurements-given-a-penny-fits-in.82494/

 

[Springfeld]

Yeah that helps. I'm assuming at the muzzle is somewhere between 3/4.