Any barrel contour can be threaded and chambered for the 722.
The #2 contour will go in but is smaller than the stock barrel channel. Not sure if a #4 or #5:will fit without opening the barrel channel up.
Here's a link that will maybe help you by comparing the current 722 barrel that you have with other barrel contours. .
https://www.brownells.com/aspx/learn/learndetail.aspx?lid=11185#ShilenThe Rem 700 may very well be the same as the 722............ I'm not sure. Notice the top Shilen/700 barrel measurements. That should answer our questions