What kind of tuner do you have on your Turbo?
I use to have a tuner on a Savage MKII that I built for benchrest, but I was not happy with the end result so I pulled it off, and it is now on my short range IBS/NBRSA 30BR Savage rifle. Tuners are much more popular with rimfire shooters. The reason why rimfire shooters like them is they are set with factory ammo, and they can not tune it. Even with match ammo, different lots shoot better than others, and benchrest shooters will grab as many different lots as they can to test with when they find a lot that shoots great they buy a truck load of that lot. The tuners take out some of the changes found in ammo lots.
There is many different designs of tuners, and many different company's making them. The concept of a tuner is not a new thing it has been around for some time now. It is rumored that SGT A York use to tune his rifle barrels by placing rubber bands on them and adjusting them up and down the barrel to tune the gun to his taste. Wrapping layers of tape, placing magnets on the barrel, and having a screw in the stock that extend up and touches and places pressure on the barrel are all forms of tuners.
Tuners in centerfire guns is more of a novelty, the reason why is they can tune the ammo to the gun for changing conditions, or what ever the need is. Tuners are becoming more popular in the short range game, now that componets are getting lighter and they can pass weight with tuners installed. I would say there is several reasons why you don't see long range shooters with them. I looked in the rules and there is no restrictions on them, but it may come to the point that they don't want them to be confused with a muzzle break which would be illeagle in a heavy gun class. One thing that come to my mind is in short range shooting you get instant feedback when you shoot, so you can change the tuner and see a difference right away as you shoot pratice rounds. In long range unless the light it right you may not be able to see your target through the scope, (1000 yards you can not see your target) and you have to wait a long time to see your target as other shooters come in and out and targets get brough back. In that time conditions could change and moving a tuner could go wrong. In the long range game shooters are not like the short range guys that change there loads as the day goes one, and conditions change. Most long range shooters pre-load their ammo. The long range shooters that do load at the range have a hard time with changes, as mentioned before it is hard to see your shots to adjust for them, and it can be a scramble to wait until the target gets back and then load. Many long range shooters do not have a long range range to pratice at, so they set the gun up to do the best they can at the ranges they have. Once a gun is set it is very hard to make a change in the middle of a match not knowing what that change will actually do.
For 30 caliber rifles there is many tuners available.
This is the tuner I have on my 30BR
http://benchrest.com/timeprecision/S...upertuner.html
This is another popular one.
http://shadetreeea.com/barrelTuners.html
This is basically the same thing as SGT York's set up.
http://rimfireshooting.com/index.php?showtopic=2653
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