Recently purchased from Josh Kunz of Patriot Valley Arms one of the new Kinetic Security Solutions ATS barrel tuners made by Aaron Hipp. Came in the mail today. Mounted it on my 6.5 Creedmoor with PVA Jet4 brake. Rifle was clean and had just switched back to the 6.5 barrel so needed to rezero and foul so used an ammo lot, lot 751, that shot good but I only had a little left. Got zeroed and shot 5 shots into a bullet hole that was there from zeroing. Didn't touch the tuner at all. That was first pic with the zero target in it.
Then I pulled out another lot, lot 715, and it took two targets to find the setting. Left is first two shots and then right is the next two shots.
Then last pic is a lot, lot 537, that never shot great but I wanted to test it. Unfortunately I grabbed a partial box so only got 7 targets shot but it started to come in on 6 and 7. Will test again next time out but it looks like it will be good in another couple adjustments.
All in all I am very happy with this KSS ATS tuner. That barrel has a little over 2100 rounds through it of match shooting and still shooting pretty good.