I have used a Gene Beggs tuner and I have a Bukys tuner that I have never installed as of yet
2 tuner camps out there in the short range BR world.
1 is using a tuner to keep the rifle in tune by adjusting it instead of changing powder or seating depth during a match.
The other is the tuner helping out by keeping your tune window a bit larger and still adjusting with powder if need be.
Calvin