I had a 30" barrel honed by Denny Tubbs so there are no imperfections in the bore and the I.D. is consistent. I also had the barrel cryoed and then I coated the bore with UBC. Denny also machined a choke (also cryoed) for me that was made to go with the wad I use (TPS). In fact, I had everything metal in my SP-10 cryo-treated. I killed a Jake last year with it on the last day at 68 yards. I hit him once in the head and twice in the neck. I couldn't find any in the body.
It is true, the pellet count is awful low when you compare it to a lead payload, but the HTL shot patterns more consistently than lead with a higher % of the load staying in the center of the pattern.
