Neat cartridge. I have really enjoyed my ugly ol' 1964-made M70 in 225. VERY accurate. Essentially, it's a 22-250 less 100fps. Mine loves 63gr Sierras and 50gr VMax's. Factory ammo has become VERY expensive and hard to find. but brass is usually available at Midway, etc. for a reasonalble price. IMR4064 and Varget have worked well.
Sounds like you got a good deal. Have fun and let us know how it shoots!
Shootist: Yes, it was Winchester's replacement for the Swift. It was a case of bad timing. 1st, it was introduced concurrent with that horrible new M70 in '64.
And then the nail in its coffin was Remington legitimized the 22-250 in '65 IIRC.