How do you change the barrel on a Mosin Nagant M91-30?

Answer 1

Best left to a gunsmith with the proper tools.

Agree with above answer. To do this properly, it requires a vise block for the barrel, and an action wrench for the receiver, along with a set of go/no headspace gauges to set the headspace on the rifle. Old barrels are frequently VERY hard to remove, and may require heat, penetrants, or in extreme cases, the use of a lathe to cut a relief groove where the barrel meets the receiver. A relatively inexpensive job for an accomplished and properly equipped smith, it will likely cost a hobbyist more in tools than the 91/30 is worth. Sorry-