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Author Topic: How to check scope  (Read 714 times)

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Offline vernonp

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How to check scope
« on: May 17, 2011, 07:49:39 AM »
I have a Weaver T36 scope that seems not to be holding POI.Is there some way I can check this at home or does it have to be done ar the range. Thank you
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Offline Bigeasy

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Re: How to check scope
« Reply #1 on: May 17, 2011, 08:59:58 AM »
You could probably use an optical bore sighter to click your adjustments in a grid pattern, to get an idea if the adjustments are working properly.  Unfortunately, usually when a scope wont keep zero, its usually when the adjustments change under recoil, something that can only be checked at the range.  Also, don't forget to check the usual suspects - loose base screws / rings.

Larry
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Offline LanceR

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Re: How to check scope
« Reply #2 on: May 17, 2011, 12:25:50 PM »
And depending on what kind of rifle and stock you've got make sure it is properly installed in the stock....

Lance
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Offline Catfish

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Re: How to check scope
« Reply #3 on: May 17, 2011, 02:15:07 PM »
It is easy to check parallax. Simply put your rifle in a good rest so that it cannot move and zero it on the target. The target should be at the range you intend to shoot at. Once zeroed without touching the rifle, look through the scope and move your head from side to side. If the parallax is correctly set the cross hairs will not move on the target, if the parrallax is not set correctly the cross hairs will move on the target. To check tracking you can set up a target at 100 yrds.  and turn the adjustment knobs. Asumming it has 1/4 moa adjustment clicks, turn it up 4 clicks and the cross hairs should move down 1 in. on the target. Next turn the knobs 4 clicks to the right and the cross hairs should move 1 in. to the left. Then turn the knobs down 4 clicks, then left 4 clicks and you should be back to the exact spot you started at.
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Offline Val

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Re: How to check scope
« Reply #4 on: May 18, 2011, 05:36:06 AM »
Did this scope previously work properly on that gun? If it did, check to insure that the screws on the base and the rings are tight. The easy way to determine is to install another scope and check the results.
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Offline Luckyducker

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Re: How to check scope
« Reply #5 on: May 22, 2011, 03:57:35 AM »
If you have a way to anchor the rifle/scope so that it can't move AT ALL (very critical for this test) in a location where you can set the aiming point on some identifiable object,   run the turrets to their mechanical limit both directions while counting the number of clicks so that you can put the reticle back in the same place (hopefully anyway).  Then look through the scope to see if the reticle is fixed in the same spot as before the turret movement.  If it is still where it was before the test it is probably OK, if it is not the scope needs repair.
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