Those 3 groove jess rebores pick up velocity. I had at least 60-70 fps increase from his rebores when compared to 4-5 groove factory barrels of equal length.

His rebores polish up nicely too, if you clean with abrasives like kg-2 on an oversized bore snake every 3-5 rounds. Leave the kg2 in the bore and continue firing. 100 rounds later, fouling with pure copper bullets will be significantly reduced.

If you ask him, he'll cut a front sight dovetail free of charge.

He apprenticed with an old school barrel guy, and assumed the tooling. A far more experienced "old timer" process, than these idiot millennials operating mass production machinery like the above mentioned ruger guide gun in 30-06. Jess fixed "state of the art" with "dated" processes.