How do you test if a scope is working ?
- Thread starter Acm
- Start date
roebuck223
Well-Known Member
in my 55 years off shooting would need to fit to gun
woodfordfallow
Well-Known Member
Camp it solid with a G clamp it must not move. Put a target at 100 YDS Zero it. Then click it five clicks right check how fare it moves. Normaly 1/4in per click.Then back to zero.Check this in all directions. If its clear opticks and not working it still mabe worth sending it to have it seviced. I have done this with a nice old faulty Lisenfeld. I paid £48 inc postage for the sevice well worth it.
Good luck woodfordfallow
Good luck woodfordfallow
Remember also that some old German scopes are `reticle moving` and not `image moving` when it remains in the centre irrespective of you clicking up or down.
HWH.
HWH.
Probably the only way to accurately tell with out gun mounting and shooting excellent advice.
gerarddwatts
Well-Known Member
sling 'em in the bin and get something decent.....and modern
I do something similar to test the 'scope.
First I get the reticle roughly optically centred by supporting the tube in a homemade double vee block arrangement screwed to a tripod. You could make something more professional from e.g. a pair of high air rifle scope mounts.
Aim the scope at a suitable fixed object and rotate it in the blocks. By adjusting the turrets you will be able to get the crosshairs to be fixed on the target instead of rotating in a circle as the scope is rotated.
Then I clamp the scope in the blocks and check the turrets move the image smoothly and evenly and pass the box test, and have about the same range of travel either side of the optical centre.
Then I re-centre the scope and fit it. Usually its quite close to the boresight.
If the 'scope is fitted to a rifle I use an optical collimator mounted on a spud in the muzzle to check the turrets are working properly. Its surprising how often they are sticky or jerky or don't return repeatably.
This is the tool I use:
Opticswarehouse Boresighters
The boresighter is also handy for quickly checking that the zero has not shifted before using the rifle, for confidence. Make a note of which grid square the crosshairs are on. If it has altered much between outings it would be worth testing zero.
I think the boresighter has more than paid for itself just by revealing that one brand new scope was defective, so I didn't have to waste time and ammo discovering it.
First I get the reticle roughly optically centred by supporting the tube in a homemade double vee block arrangement screwed to a tripod. You could make something more professional from e.g. a pair of high air rifle scope mounts.
Aim the scope at a suitable fixed object and rotate it in the blocks. By adjusting the turrets you will be able to get the crosshairs to be fixed on the target instead of rotating in a circle as the scope is rotated.
Then I clamp the scope in the blocks and check the turrets move the image smoothly and evenly and pass the box test, and have about the same range of travel either side of the optical centre.
Then I re-centre the scope and fit it. Usually its quite close to the boresight.
If the 'scope is fitted to a rifle I use an optical collimator mounted on a spud in the muzzle to check the turrets are working properly. Its surprising how often they are sticky or jerky or don't return repeatably.
This is the tool I use:
Opticswarehouse Boresighters
The boresighter is also handy for quickly checking that the zero has not shifted before using the rifle, for confidence. Make a note of which grid square the crosshairs are on. If it has altered much between outings it would be worth testing zero.
I think the boresighter has more than paid for itself just by revealing that one brand new scope was defective, so I didn't have to waste time and ammo discovering it.
bewsher500
Well-Known Member
Similar threads
