Indians For Guns

Dear all,

My recently-purchased Diana 460 magnum in .177 is shooting low. I have mounted a Barska scope on it with a high profile single piece mount with stop pin. I tried zeroing it at a distance of 10 metres. The elevation is at its highest, yet the rifle shoots about 2 inches below the bull's eye. There's no problem with the windage. Is this a case of 'barrel droop' or the rifle has to be zeroed at a longer distance. If it's a case of barrel droop, what can be done to solve it. Suggestions on this would be highly appreciated.

Thanks and regards,
Ebenezer

Hi there try and use medium or low mounts the problem should resolve.
Junaid.

This is a common occurence. You will have to shim the scope. Basically put a thick card sheet between the scope and ring. I think you would hvae to shim the front ring so you can zero at 10mtr.

You will find a shimming guide pdf on the bushnell website.

A 460 at 10mtrs ? Sure ?

M.

ebenezer wrote:Dear all,

My recently-purchased Diana 460 magnum in .177 is shooting low. I have mounted a Barska scope on it with a high profile single piece mount with stop pin. I tried zeroing it at a distance of 10 metres. The elevation is at its highest, yet the rifle shoots about 2 inches below the bull's eye. There's no problem with the windage. Is this a case of 'barrel droop' or the rifle has to be zeroed at a longer distance. If it's a case of barrel droop, what can be done to solve it. Suggestions on this would be highly appreciated.

Thanks and regards,
Ebenezer

Zero the scope at 20 meters and you should be hitting bulls’ eye at approx one mil dot low on your cross-hairs.

Now there ia a proportion to the equation. C-T-C from barrel to scope.
Tyr out the combinations...and you will seek great results......

Give it a try.......

That is provided you have Mil-dots on your scope.

My scope is zeroed at 20 yards and I do 5 yards paper punching in my apartment and it goes 4 mil dot's below the cros hair.

I can shoot whole day and the .177 pellet would go hole in hole (The C-T-C for my set up is 3.5 inches)

Thanks Junaid, Manish and Pramod. Manish, the Bushnell guide says the rear ring should be shimmed to make the rifle shoot high. However, i'm yet to try it. Is the distance (10 metres) too less for zeroing the D 460? Pramod, the scope is not a mildot scope.

Regards,
Ebenezer

Don't mind my asking...Are you really going to use the D460 with a 6x Barska scope for shooting at 10mtrs ? Indoors ? Does your scope focus down to 10mtrs, to my knowledge only Leapers and Centerpoint can.

M.

A Scope Shim Guide
By Charlie

DISTANCE IN THICKNESS CHANGE IN
YARDS OF SHIM INCHES
25 .001 0.25
50 .001 0.50
100 .001 1.00
25 .002 0.50
50 .002 1.00
100 .002 2.00
25 .003 0.75
50 .003 1.50
100 .003 3.00
25 .004 1.00
50 .004 2.00
100 .004 4.00
25 .005 1.25
50 .005 2.50
100 .005 5.00




FOR MAJOR ELEVATION ADJUSTMENTS:

35mm negative film is .005 inches thick and a good shim material. Cut for a good fit.
Shimming can be done in the lower half of the ring also, but great care must be taken.
Over adjusting of elevation and windage may lead to internal damage of your riflescope.


• Shim the front of the base for additional downward movement
• Shim the rear of the base for additional upward movement
• Major windage adjustments require the use of a windage adjustable mount
• Best results will be with using the lowest profile mounts possible.
link:
http://www.charliedatuna.com/Airgun%20Info.htm

fantumfan2003 wrote: Does your scope focus down to 10mtrs, to my knowledge only Leapers and Centerpoint can.

Errr, so does my Bushnell banner, 3200; Hawke MAP; and a pair of Simmons

Put the gun in a vice, and shoot five shots at the same POA. Post results and lets go from there..

MoA wrote:Put the gun in a vice, and shoot five shots at the same POA. Post results and lets go from there..

unfortunately, if he clamps his springer, even holds it tight, the shots will fly all around the card.

ebenezer, you are rather brave zeroing a heavy airgun freehand at 10m. i'd use a support to rest my hand as i held the gun if i were you.