In past years CZ USA offered the CZ527 carbine in 22-250. According to
The Rebarrel/rechambering guide at
[URL=http://ammoguide.com/cgi-bin/aichamber.cgi ]re-barreling guide[/URL]
a 22-250 can be re-barreled into a 45ACP rifle.

Looks like this would make a nice short 45ACP rifle. Has anybody done one, and who makes the barrel? Is it reasonable to simply rebore the old barrel, and who does this?

This is a 1903 Turkish Mauser [98 Mauser design], that cost $50.
I think it is a better action than a $500 CZ527, but that is my opinion.

Anyway, I have unscrewed the barrel off both CZ527s and 1903 Turks. It is done with an action wrench and a barrel vise.

Then one can cut threads and cut a 45 chamber on another barrel, and screw it onto the receiver.

The 45acp case head looks like 22-250 case head [both descendants of the 1889 7.65x53mm Mauser case head], so the bolt face and the extractor already fit.