Here's what Eldon "Buck" Buckner says about Eleanor's 7x57 in the biography of O'Connor by Robert Anderson. Buck was a long-time friend of the O'Connors and owns several of their rifles:
"In 1951 crack metalsmith Tom Burgess modified a Czech VZ24 Mauser action for O'Connor, fitting a hinged floorplate and 22-inch barrel chambered for the 7x57mm cartridge. Spokane stock maker Russ Leonard then fitted a stock with fleur-de-lis checkering to the barreled action, and Jack had his first 7x57 since he'd traded off the Minar in 1940. Or did he? Eleanor O'Connor tried the little rifle, fell in love with it, and after the stock had been shortened a bit, claimed it as her own. She proceeded to use it on everything from elk to eland for the rest of her hunting career."
