Air rifle won,t zero !!

[rec-baller]

I have recently bought a BSA Superten( fac rated ), i also bought a Hawke map pro 6- 4x16x50 scope and medium mounts - brand new.

i fitted the scope and bore sighted it with a laser bore sighter, when i tried the rifle out at 20 mtrs it was shooting 12 " low !!!i turned the mounts round and swapped back to front-- still the same,, next i put shims under the bottom of the front mount and still 12" low- even at full elevation on the scope

i am going to try it on a different rifle,, any body else think it could be the scope ??or any suggestions,,

shaun

[yankeedoodlepigeon]

All you can do is try another scope then mounts try on another gun if possible to eliminate the problem. or take to your local shop to have a quick look for you.

[Fat toad]

I may be wrong but I thought if you are shooting low you put the shimes under the rear mount to make the scope point down you said you put them on the front this is taking your scope up and away from point of impact I may be wrong some one on here will know

[snarepeg]

As above, low shooting shim BACK mount. john

[amateur]

Shimming, as above, should resolve the problem

[Billy.]

Laser boresight will fire a beam out of your rifle in a straight line, which is not how a bullet flies. Your rifle is zeored to 0 yards, not 20.

 

When you shoot a rifle, the gun is aimed upwards at varying degrees, depending on the distance, so that the bullet counters gravity and arcs in the air. - Which I'm sure you'll know

 

When you laser boresight a gun, it removes the arc, as the beam does not bend like a bullet does and therefore will zero your rifle lower. You need to calculate the drop on the pellet at 20 yards and then add that on top of the point of the laser on the target.

 

12" low at 20 yards sounds a lot, but then again, a .22LR bullet will drop 2" if zeroed at 0 yards.

 

I think I've not read your issue properly, but I think that a Laser Boresight isn't needed.

Edited August 16, 2011 by Billy.

[weihrauch80]

Laser boresight will fire a beam out of your rifle in a straight line, which is not how a bullet flies. Your rifle is zeored to 0 yards, not 20.

 

When you shoot a rifle, the gun is aimed upwards at varying degrees, depending on the distance, so that the bullet counters gravity and arcs in the air. - Which I'm sure you'll know

 

When you laser boresight a gun, it removes the arc, as the beam does not bend like a bullet does and therefore will zero your rifle lower. You need to calculate the drop on the pellet at 20 yards and then add that on top of the point of the laser on the target.

 

12" low at 20 yards sounds a lot, but then again, a .22LR bullet will drop 2" if zeroed at 0 yards.

 

I think I've not read your issue properly, but I think that a Laser Boresight isn't needed.

hi try checking your silencer to see if the pellet i skimming the lip of the silencer on exit

[peek-at]

As above you need to shim the back mount......

 

Easiest way I find to zero is from a secure position (gun rest or similar) take a shot at a target. adjust your scope to put the cross hairs on the pellet hole.

 

Job done!

 

PS

if shimming the back doesn't work check that your barrel isnt bent (even a very slight bend could cause your problem) This happened to me with a used rifle once!

 

cheers

 

[eccles]

As Peek-at suggested i never bore sight a airrifle.My mate Jeff 1954 had same problem but was 3foot out right and 18inch high when i checked it for him i found that the weihrauch mod had broken inside thus throwing pellets out.Must have over tightened it. As peek said just fire a shot then move cross hair to pellet hole.Then you can zero it to the distance you want it zeroed at.

[kent]

That scope will go further down in elivation though? sometimes lower quality scopes get stuck as much as you click they dont go up or down much- occasionally they suddenly shift a large amount unexpectedly when you have managed to establish a zero. Avoid packing the mounts if you can as it can damage the scope tube and 10" is a fair amount of packing as idealy you want your set zero to be around mid point adjustments on the scope "Optically centred".

 

I feel the barrel is not fitted correctly to the action or things have taken a bash, consider droop compensating mounts but if you must tread carefully with the packing

[timmytree]

Optical centreing and shimming if needed is the way to go but to be 12" out on full adjustment isn't right.

I see you are using medium mounts, check that no part of the front end of the scope is touching the gun at any point, if it is, that's your problem. If so swap for high mounts.

[Dekers]

He shouldn't need to shim anything, if he cannot zero this setup there is something very wrong somewhere, ......... and still shooting the same, shims or not, come on guys, this whole thing doesn't add up!

 

Try your dealer!

[corvid wings]

zero without the bore sigh ,bet its bang on

[Dexterboyz]

check ya pellet aint hittin the silencer on the way out, if you have 1.

[Dekers]

Out of interest, this goes back nearly a month, where are you with this, is the problem solved, I suspect I am not the only one curious to hear what the problem was!

[corvid wings]

yes tell all whats the out come bud?

[Mat2803]

I had this on a brand new set ov smk elevation was ok but windage was off the adjuster returned to shop and got a new pair only to find that the scope was no good with a springer got it zeroed but would not stay zeroed for very long must ov been knocking it out put my nicko stirling back on no problems