The barrel will fit but is a different contour most likely. The 722s have 24" barrel length, most 700s of recent manufacture have 22" barrel length. The bolt face is different between the 222 family of cartridges and the larger 22-250, 243, 308 family. The bolt face can be opened up for the larger case, but ruins any collectors value and would be expensive. A different extractor would have to be fitted also.