I have a 1893 Spanish Mauser that has a very worn 7X57 barrel on it. A 175gr Rem bullet is barely in the case to almost touch the rifling. Cast is minute of 55 gallon drum.
I have a 7.62X39 barrel and feed kit on the way. I also have a '98 Mauser barrel in 25-06 in the garage. This could become a 257 Roberts.
I got the idea for part of this when talking to a guy that rebarreled benchrest guns. He said the barrels do not necessarily needed to be cranked way tight.
I was thinking of installing the barrel and checking headspace and doing what was necessary there, then putting a witness mark on the action and barrel. Mark the barrel for milling flats just in front of the action for an open end wrench. Then reinstall the barrel and drill a hole at the front of the action on the bottom that just goes into the barrel for a setscrew.
A Leupold type sight base would be installed on the action. A scope would be sighted in and one of the windage screws loctited in place. Then if additional barrels were fitted in the same method a scope could be installed and sighted in for the barrel.
To change a barrel you would remove the action, take out the setscrew, turn out old barrel, turn in new barrel, change mag spring and follower if needed, tighten the set screw, change the scope, install in the stock.
What are the flaws in my plan?