Tuner adjusting

R

RL Weikart

Member
Here is the way to find out if the Beggs tuner rings are really working as advertised. There was a post by Byran in Raton about mounting a bag rifle on a rail, consequently this is what I came up with to try. The Beggs rifle made the mounting on the home made rail top not difficult as the Panda action has the holes on the bottom for pillar bedding. I used a piece of Delrin as the intermediat piece.

Beggs Bag Rail Gun.jpg
 
Bob, this is an excellent idea! :) I'll be looking forward to hearing of the results.

Being able to adapt a Beggs rifle to a rail gun in such a manner is yet another advantage of this stock system. Well done.

Gene Beggs
 
RL
Could we get a close up pic of how the action is attached to the block? Looks like there may be 3 lock down nuts per side.
 
That set up doesn't leave much room for excuses. :)

If the rifle shoots on that system and you can't get it to shoot off the bags, it's time to have a heart to heart with the guy in the mirror.!!!! :)

Let us know how it works.

Hal
 
Beggs Rail Setup

Gene,
Thanks for the accolade. My idea or reason for using Delrin was to cut down the possibilities of barrel vibrations being transfered to the main frame.

Don,
here is a closeup of the action to the rail, keep in mind you are seeing a reflection of the hold down bolts in the side of the action. There is three bolts on each side.

Hal,

Your statement "If the rifle shoots on that system and you can't get it to shoot off the bags, it's time to have a heart to heart with the guy in the mirror.!!!!" is right on the money. The next time I shoot it as a bag gun, I will try to duplicate the nice small groups that I shotwith the setuo as pictured.

Beggs Rail Setup.jpg
 
Ideas, Ideas, Ideas..

this may open up something new.

For those possibly limited in the financial end.

Why not shoot a Begg's stock on your favorite combination as a bag gun then just have to purchase a rail and adapt the stock to the rail for unlimited shooting?

Makes sense to me. :confused::confused:

Calvin
 
RL Weikart said:
Here is the way to find out if the Beggs tuner rings are really working as advertised. There was a post by Byran in Raton about mounting a bag rifle on a rail, consequently this is what I came up with to try. The Beggs rifle made the mounting on the home made rail top not difficult as the Panda action has the holes on the bottom for pillar bedding. I used a piece of Delrin as the intermediat piece.

View attachment 8150
Click to expand...

Hi Bob,

How much of a "point of impact" change is there, if any, between shooting off bags vs. rail (with 25+ pounds below bore centerline of rail block) using identical aimpoint/scope settings, loads, and wind conditions?............Don
 
Beggs Rail

Don, Good to hear from you. The point of impact on the rail compared to the bags was 1 1/8 inch low at the 6 o'clock position. The wind was very light, powder was 28.9 grains VV133, bullet was a 68 grain FB. This is what I shot on the previous practice session.

:cool:
 
RL Weikart said:
Don, Good to hear from you. The point of impact on the rail compared to the bags was 1 1/8 inch low at the 6 o'clock position. The wind was very light, powder was 28.9 grains VV133, bullet was a 68 grain FB. This is what I shot on the previous practice session.

:cool:
Click to expand...


Don and Bob

This change in point of impact is exactly as I would have expected. Consider that in the bag gun configuration, the entire barrel is supported by the forend and front rest; in the rail gun configuration, the barrel is supported by only the front receiver ring and is hanging out into space where it will certainly droop. This is what causes the lower point of impact.

Gene Beggs
 
Gene Beggs

In a stock used as a bag gun, how is the barrel supported by the front end
and rest. With no contact with the barrel how would it be any different
than on the rail. Mounting is at the same point, no more or less
 
Gene Beggs said:
Don and Bob

This change in point of impact is exactly as I would have expected. Consider that in the bag gun configuration, the entire barrel is supported by the forend and front rest; in the rail gun configuration, the barrel is supported by only the front receiver ring and is hanging out into space where it will certainly droop. This is what causes the lower point of impact.

Gene Beggs
Click to expand...

Ah yes, I forgot with the bag configuration the forend stock piece is clamped to the barrel.

Still, I am surprised at the lower impact point of the rail, in that with the lower mass of the rail base it should tend to cantelever the barrel upward upon recoil, but apparantly not as much as the forend bag supported configuration.

Wonder how the "point of impact" would change with the rear portion of the stock assembly removed? Probably would be more of a vibration change than a cantilevered recoil effect, or perhaps a combination of both.

Varmint Al, would have a field day in modeling the various differences....................Don
 
Bob Kingsbury said:
In a stock used as a bag gun, how is the barrel supported by the front end
and rest. With no contact with the barrel how would it be any different
than on the rail. Mounting is at the same point, no more or less
Click to expand...


Bob, evidently you are not aware that the forend of the Beggs stock bolts directly to the barrel, which in turn sits solidly in the bag of the front rest. The barrel is then supported by the front rest, not hanging out in space, supported by only the front receiver ring.

Gene Beggs
 
Don,

Don, You were wondering about trying the setup without the rear portion of the stock, That is on my things to do in the future, will let you know the results when I get it done. Another thing I want to try is, varying the weight in the rear of the stock, Gene was thoughtful when he made the butt plate and installed a screw to attach weight to if needed. My plan is to come up with a cantilever setup to vary the weight fore and aft, inside of the stock of course. Kind of like a tuner in the rear. I don't know how much or how fast the barrel vibration travels through an all metal stock and if it would have any effect on the barrel. Don you mentioned this might be a project for Varmint Al to work on,it sure would. Okay boys and girls what do you think?
 
My Prediction

is that one clock position per 3 degrees temp rise will keep it in tune. That is turning the tuner towards the action as temp rises.
Go fer it.
BA
 
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