Question about BSA 3-9x40 Deer Hunter Riflescope

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Need more adjustment......

I just got a scope 3-9x40 and gun shop fitted it but i cant seem to get enough up and right adjustment.... help. also just add im left handed just encase made a difference.

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It sounds like the gun shop did not mount it right if rings tighten on bases from both sides it needs to be evenly tighend on both sides as for up and down some times you need to add small shim to front ring or back ring this must be done some times not much but there is times just use a index card to shim it cut to fit the ring if ya would need more help contact me back hope this helped ya

Posted on Mar 01, 2009


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1 Answer

Can adjust scope low enough

Hey Andy..
The scope won't adjust "lower".. lets talk about what you are calling "lower". The "lower" the "crosshairs" go, the higher the gun shoots...and to the opposite end...the "higher" the "crosshairs", the lower the gun shoots...

If the barrel and the scope are perfectly parallel.. when you lower the crosshairs in the front of the scope, the barrel will/must be raised to hit the same spot.. and the opposite is true for the other direction...

......IF this is what your are experiencing,, no biggie..

If this situation above is NOT what you are experiencing, the scope mounts need to be "adjusted" or replaced..

Sep 25, 2017 | Optics

1 Answer

My rifle is out, 3"

The gun can be getting hot during your sighting in session. Heat from the reviver can throw your setting off, then as you adjust things get worse. Start and loosen the scope rings one at the time. Front first, and re-tighten, then the rear. Fire 2 shot groups, letting the gun cool some in-between each group. This way you can figure out if it is the scope loosing it's center or the mounts getting in a bind due to heat and twisting the tube. After each adjustment tap on the scope to set the cross hairs, again this will give you feed back, if the scope can hold it's center. Hope this helps Fix Ya up.

May 18, 2011 | Optics

1 Answer

Cross hair broken on my B S A mil dot 4-16 x 40 scope will any gun shop be able to repair

Yes, more than likely.
The scope just needs to be disassembled and the crosshair flange repaired or replaced.
A dealer should be able to order the part or at least fit one similar enough to work.
The trick is not to allow any moisture into the scope's internal cavity during the repair.

Mar 06, 2011 | BSA 4-16X40mm Mil-Dot Rifle Scope - ...

1 Answer

Elevation adjustments do not seem to hold or the scope moves slowly over time. I'm not certain. Windage works fine. Looked at manual on the web and the scope must have changed design because not...

Most of the time a scope that creeps off its zero, has a loose mount screw and or loose mounting ring. Check the mounts all screws. Some times the opposite is true. The mounts are to tight and in a bind. Then during firing the receiver heats up an tweaks the scope enough to cause creep. If the scope is always on zero when cold and creeps off after a few shots, she is in a bind. Make all adjustments to the scope base and rings with a cold gun. Loosen the front ring screws first then re-tighten then loosen the rear doing the same. Then try and re-zero the gun. If the gun never comes back to zero, you end one day shooting hi to the right and try again the next day shooting in the same spot try to re-tighten all screws. Screws from mount to gun then scope rings to scope body.

Jan 02, 2011 | Nikon 39x40 Matte Nikoplex Buckmaster...

2 Answers

Where can I get replacement caps for the elevation adjustments.

the only way to find cheap caps it try a fuw gun shops to see it they have any old scope that dont work and buy the caps that will fit your scope most gun shops keep old broken scopes just for that?

Nov 27, 2010 | Burris 3-9x50mm Fullfield II Rifle Scope...

1 Answer

I have a barska 6.5-20 x 50 scope and it is mounted on a 243. I have killed several animals with it and the other day my mounts got loose so I tightened them up evenly and now my scope shoots low and will...

it could be that the mounts are still not in the right place on the rail it would be the eye end thats out,,,try taking the mounts off and cleaning them then re-fitting them this may help but i think
when the mounts become loos the recoial from the gun firing could have shook loos the scope inners or even bent the mounts,,,if you can try a new set of mounts first,, but i bet the scope has now gone to the happy hunting ground in the sky
a 243 has a *** of a kick on it!

Aug 11, 2010 | Barska Optics Barska® 6.5-20 x 50 mm Rifle...

1 Answer


you have a gun mount problem its not a scope problem ,,,the scope mount is not a good fit to the gun and is off set to the barrel,,,
set the scope to center of its ajustment and then "pack out the scope with a bit of old 35mm film till you get it close to were you need it to hit then do the last bit of ajustment on the turrets,,this works for lift and windage

Jul 06, 2010 | Barska Optics BARSKA 1040X50 AO Varmint...

2 Answers


You may try to bore sight it first. Pull the bolt and setting the gun on a good rest sight thru the barrel at a dot on the wall within ten feet. Then adjust the scope to that dot. As you adjust the scope tap the bore of the scope with a screw driver handle, tap it after each adjustment not hard, but enough to give it a sharp jolt. Once you are close here, move out to the range and shoot at 15 yards. Using a rest, again tap the scope after each adjustment. Then move out to 50 yards and you will want to be shooting high 1.5 to 2 inches here. Shoot slow keep the barrel cool and try for 2 shot groups till you have got the scope dialed in. Then move out to 100 yards for your preference of zero. Remember use the same ammo you will hunt with or at least the same bullet weight. If you can't get her to get on paper you can try to loosen the scope in the rings, one at the time once the gun is a little warm. Loosen the barrel ring first then snug it back down and then the receiver ring. If your group moved now, she was in a bind due to a cold gun at set up / installation.

Dec 01, 2009 | Optics

1 Answer

I have a Bushnell Elite 4200 6x24x40 rifle scope 42-6242M

First is to try for a group, do not adjust the scope in any way. Shoot 4 rounds with out adjusting the scope. The gun should settle down and start to group. If you can not get a group in 6 rounds go clean that gun & check your ammo. Start over. If she does not group, its the gun not the scope. Once it starts to group move the cross hairs in the opp direction small clicks and "TAP' the scope after each adjustment. Shoot for a group each time 2 rounds should group. Get a target that has a grid to help get on faster. 

Sep 20, 2009 | Bushnell Elite 4200 6-24x40 Riflescope...

1 Answer

AEG triweaver rifle scope 3-9x40 can be combatible on my air gun DIANA 52 model with very big recoil?

If it fits the rail, it'll work, just make sure to adjust the scope to absorb the recoil, by target practice at about 60-80 ft, and adjusting the scope up or down until it absorbs the motion of the recoil. Hope that helps!

Mar 08, 2009 | Optics

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