WARNING:
Pistol barrels ARE NOT just pieces of pipe that can be screwed on and off at will.
In order to rebarrel a revolver you need the proper action wrench and barrel vice.
Attempting the old trick of sticking the barrel in a set of wood blocks and turning the frame with a hammer handle or piece of 2X4 is the best method known to RUIN a good revolver.
Trying this old trick can and will bend or even break a frame. Ruger barrels are put on TIGHT at the factory.
Next, you need a lathe to cut the barrel shoulder, since barrels almost never screw on tight with the front sight at 12:00.
Next you need an expensive cutting tool that works down the barrel to properly cut the barrel to the correct barrel/cylinder gap, which MUST be within narrow specs, AND 100% square with the bore.
To little, to much, or a off square cut and the gun is inaccurate, spits lead, or has a cylinder that sticks.
Next, you need an expensive tool to properly cut the forcing cone in the rear of the barrel. This MUST be cut to within very narrow specs or the gun is inaccurate and spits lead.
In short, all those articles in old gun magazines about changing out barrels with wood blocks and files have ruined a lot of fine guns.
Attempting to change out a revolver barrel, especially a very tightly fitted Ruger, without the correct tooling and knowledge is pretty well guaranteed to ruin the gun.
NO JOKE.