Jerry, Why do you want him to have the rifling for a half-inch past the forcing cone removed , Which is what Taylor throating does. A barrel prepped with a proper crown and an 11 degree forcing cone is ideal.Plus to get a Taylor throat done will be more expensive and won't achieve much if any better results.
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Hello Aussie;
It is just another option, since the barrel would be removed to do the shortening, crowning, and sight installation.
Taylor Throating is a very good upgrade. He seems to be interested in making the revolver "top shelf". Forcing cones are archaic and aren't used much in quality target revolvers.. forcing cones begin upsetting and distorting the projectile, when it is least supported; while in transition from the cylinder to the barrel.. Taylor Throats allow the projectile to enter the barrel freely and only engage a gentle 1-1/2 degree leade angle while fully supported; this does not overly distort, or change the center of gravity of the bullet. Leading is almost completely eliminated, and accuracy gains are often substantial.
As for the bluing and sight question...The barrel is always re blued; Jim's sights have inter-changable blade inserts..ramp/post,etc..
Take care
Jerry