A other factor in value is the chance of poor choke opening work. Look at enough SXS muzzles you will see many out of round alterations. Running a reamer it’s critical everything is concentric . Problem with concentric on a hand regulated SXS barrel is they were bent to regulate. Reamer set up on the bend is not going to run true.
A very few gunsmith will set the job up carefully and refuse to alter if it is risky. Most are low price fast turn with a high percentage chance of out of round .
Want to see a high risk alteration google “Larry Potterfield open chokes” good utube on how not to do it. Did not indicate the tool before he cut, relied on the bushings to index the reamer.
William
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