I have used this on every new barrel or rifle I have ever acquired. ten to 15 passes up and down the bore with 4 aught steel wool on a jag. Saturated with oil. I have never had an accuracy problem with that scenario. I have even done it more than once to a barrel if they coppered up. This proceedure will send shivers down the backs of the real shooters, but it works for me.

El Lobo