Just eye-balling it, I’d guess 45-50 Peabody (45 Sporting).
If not it, likely another Peabody cartridge.
WACA #8783 - Checkout my Reloading Tool Survey!
https://winchestercollector.org/forum/winchester-research-surveys/winchester-reloading-tool-survey/
November 7, 2015

Steven Gabrielli said
Looks like a Peabody, however those dimensions don’t match. I have:Neck Dia .478
Base Dia .516
book has both case length and cartridge length as 2.08 so one of them is a typo.
Cartridges of the World 17th edition.
Also states .45-55 Turkish carbine is similar in looks.
I enjoy these cartridge threads! Needed to order a part today and the 17th Edition was less than $30 on Amazon, cheap for a reference book. New edition coming out January 2026. My little reference library simply wasn’t complete without it, no idea why I didn’t pick one up years ago. Thanks, Steven!
Mike
1 Guest(s)
