Tuner weight vs barrel profile

C

center22

New member
A competitor (who finishes strong at many PSL/ARA Nationals matches) mentioned during a casual conversation that its been his experience that thinner profile barrels (.850") usually require a little more weight on the tuner, than heavier (.900"+) profile barrels. Any thoughts on this? John
 
Let's use a gunsmith from the Midwest who, whatever else you may think, turns out a competitive gun. He's used barrels from .850 thru .900 and I've never seen anything other than a standard weight Harrels on any of them.
 
tim said:
Let's use a gunsmith from the Midwest who, whatever else you may think, turns out a competitive gun. He's used barrels from .850 thru .900 and I've never seen anything other than a standard weight Harrels on any of them.
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If we are on the same page, the Midwest gunsmith your referring too, prefers a #7 Contour (1.200" tapering to .900" at muzzle) on his personal competition rifles. One of the heaviest barrel contours available.

If my memory serves right, Landy who placed second at the ARA Nationals in December, was using the same #7 profile in a Shilen Polygon ... his standard Harrell tuner setting when I checked it, was at "100". I also believe the above gunsmith we're referring too, leaves most of the tuning decisions to the client.
 
center22 said:
If we are on the same page, the Midwest gunsmith your referring too, prefers a #7 Contour (1.200" tapering to .900" at muzzle) on his personal competition rifles. One of the heaviest barrel contours available.

If my memory serves right, Landy who placed second at the ARA Nationals in December, was using the same #7 profile in a Shilen Polygon ... his standard Harrell tuner setting when I checked it, was at "100". I also believe the above gunsmith we're referring too, leaves most of the tuning decisions to the client.
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We're not on the same page, think WLM.
 
FWIW my one .850 straight 24 inch barrel wants a bit LESS weight on the tuner. I use a shaved H/H shell. Just a data point, not an endorsement. bob
 
Fred: For me it has been a head scratcher. Exact same length with a H/H standard shell or a shaved shell does not produce the same result. It does with some barrels, but not my .850 straight. So it is length and weight for this one. bob
 
The von Ahrens phenoneon

My new rifle with a Ross Taper Shilen Ratpoop on it is "In Tune" right where the PRX sez it should be, lengthwise. Moving that little "Moderator Ring just two lines counter clockwise makes a two hole group. The more it could be screwed clockwise, the tighter the hole got. The dang ring can't weigh 1/2 oz, I don't think. Wassup with this? It appears weight do make a difference.

Pete
 
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Pete must be out enjoying warm weather.

The RvA tuner does not "click" The focus ring turns freely until you lock it with the set screw. The focus ring has either 6 or 8 revolutions, depending on when the tuner was made. bob
 
Adding weight, will also add length.

Unless when turning the tuner barrel, doesn't move the weights forward. Then, I don't know.
 
There seems to be some confusion. The RvA tuner adds length by adding weights in front of the tuner body. You can add unlimited weights if you have enough of them.

The focus ring sits behind the tuner mouth . It does NOT change length but changes weight forward of the crown in little itty bitty bits. You tune an RvA by adding/removing weights and maybe the bloop tube then fine tune with the focus ring. It is much more precise but more difficult to tune than an H/H tuner design in my opinion.

Those of you who want to use the PRx will have fits with the RvA. You gotta tune with a hack saw if the inner bloop tube is the muzzle or with a grinder if the weights are the muzzle. The thinnest weight is maybe about a half inch thick. bob
 
bob finger said:
Pete must be out enjoying warm weather.

The RvA tuner does not "click" The focus ring turns freely until you lock it with the set screw. The focus ring has either 6 or 8 revolutions, depending on when the tuner was made. bob
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Indeed I was! Shot an informal match today. First @ 100 Yds and then @ 50 yds. It was good to shoot outside again.
 
Thanks guys

It is the same as the Lowey tuners here in Australia. The length alone on these tuners didn't get me a tune but the length via Tonys method and then finding the weight position certainly did the job.
kind regards Ben
 
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