Monty,
This is your rifle and you can do whatever you want with it, but I urge you not to have it rechambered.Cases for 38 spec.are easily avaliable and if you can't cast your own bullets, I am pretty sure you can buy heeled bullets from Buffalo Arms or someone else.This assumes that this is the bullet you need, but I don't recall if you ever "slugged" the barrel to determine the groove dia.Since you mentioned a local gunsmith,he should be able to help, if you can't do this.
Mike