Currently, ASSRA Schuetzenmeister has ruled that they are not legal in ASSRA events. However, the Rules Committee is reviewing that issue amongst others so it may or may not change in the near future, depending on their recommendations to the BoD.

As the particular person who brought that idea up on here a coupla years ago, and got his butt burned for it...... The answer right now is NO!! 

  If they do become allowed in the future I'm not sure they will help a whole lot with the rifles we use. Gun design is working against us.

  Some people seem to have the idea that a Tuner will turn bad ammo into good ammo. Far from it.

  What a Tuner does is take good ammo and "smooth" out the accuracy level from lot to lot which is the big bug-a-boo of .22 ammo. Of course "bad" ammo will be improved, but there's no way you can take 2" ammo and make it shoot into 1".  I know, I've had lots that shot like a house afire, and the very next lot was so-so. Even with the high priced stuff.

  As I get the picture even when made on a dedicated machine the quality cycles like a wave graph. So as the machine goes along the accuracy potential rises and falls. Part of the price you pay is a constant testing on the cartridges coming off that machine, and when the accuracy level drops off then that ammo is shunted to one side until the level returns to spec.'s. The first thing that comes to mind is what is the acceptable accuracy spread, how often do they test, and how many sub standard rounds get thru before they shunt the cartridges off. From descriptions I've read those machines spit out ammo like a stream of water.

  This is supposedly where the Tuner comes in.

  A while back Precision Shooting reported that some experimenting is going on now with the jacketed bench shooters to see if there's any benefit for them.

PETE

Mishooters word are not right!!! The Schuetzenmeister had nothing to do with that ruling the BOD made! All I had was one vote! The BOD ruled them to be NOT LEGAL in ASSRA!!!!

gents,
I was not around in the late 1800's or early 1900's. admittedly  and anti cant block can help tune a barrel, also so can a barrel band as a local gunsmith klause used on our rest guns.
how ever if you want to use barrel tuners go shoot copper in a bolt gun or a gas gun they do not belong on single shots.
IRISH

sleds or Pope style rests are legal and they cand be used to tune a barrel - but they are traditional - just an opinion and observation for what they are worth - which probable is not much - u all have a great day now - the rimfire - cdpersons

I take it you don't like tuners, but did you ever try one.
  Shooter

as ussual the 2 sides come forward. I would put every dollar I have on that Pope, Rowland, etc. would use a tuner if they new it would improve there accuracy. Again one side anything that isn't a straight Ballard, Stevens, etc. is a sin. You guys a technology biggots. Oh by the way are stryker actions on a Ballard against the rules to? Short scopes? Coil spring ballards (sneaky rascals)? Thank goodness this forum is ussually only a small few of the actual shooters members. Hey there is a Idea, how about a poll of the membership what should be allowed?