Which rifles fired a 257 Roberts?
Quite a few different ones. Some of the more notorious ones were
war souvenir Japanese Arisaka rifles, which had been converted to
fire the .257 Roberts, as the Japanese ammunition was a bit scarce
on the commercial market. I know the Ruger rifles were made
available in .257 Roberts, including the Mk. II and M77, as were
the Winchester Model 70, Browning Model 81, and Remington 700. Sako
made custom rifles in that calibre, as well.