Great news, William. William sleeved one Yildiz .410 for me before he made a screw-in for another Yildiz single shot of mine. The first gun out of the box would only shoot 75 in the 10" ring at 40. This was with TSS 9's. When we first shot the gun at his shop, he had to make three on the spot adjustments in his shop to choke geometry and it is now a 131 in the 10" ring at 40. On my gun which out of the box was a 100 in the 10" at 40 I had the barrel cut from 28" to 24" and had Mike Orlen thread the barrel. William's choke raised the density to 159 in the 10" at 40 yards with brass hulls and 130 with plastic. TSS 9.5"s. The Sumtoy .410 choke is a winner. It's good news that all can now be done at one shop. I am not aware of any other specialized turkey choke for .410.