I have a Weaver T-36 that is several years old. It recently started "losing" zero and has to be adjusted to maintain zero. I've tried turning vert and horiz all the way down and returning to preset point. It lasts a couple of shots then goes high left perpaps 1" high and 3/4" left. No one seems to have solution short of swapping. Thanks, Mike
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Scopes have a spring on one side of the optics tube and a screw on the other side. This is for up and down and side to side adjustments. The issue appears to be that the springs have lost their point of contact or tension.
be cearfull you dont crush the scope tube,,but try rapping a little strip of sticky rubber or plastic tape round the scope tube then nipping the scope ring caps down onto this,,,but i think your scope rings are worn out or the wrong size,,ie 30mm not 25mm
i have air rifle scope's on my 7.62/308 and on my 303 none of them move about at all and they have stayed on zero for years now!
You must have the correct rings for your base. If the scope has rimfire dovetail rings already attached, it should be easy. Remove the 4 setscrews on the top of the receiver, install the dovetail
mount (use blue locktite and DO NOT TIGHTEN THE SCREWS MORE THAN 10
IN/LBS! Otherwise you may strip the threads in the receiver!).Loosen the clamps, place the scope on the dovetail mount and tighten snugly.
If it has weaver mounts, you will need to install a weaver rail to your receiver. Remove the 4 setscrews on the top of the receiver, install the weaver mount (use blue locktite and DO NOT TIGHTEN THE SCREWS MORE THAN 10 IN/LBS! Otherwise you may strip the threads in the receiver!). Install the rings in the weaver slots, tighten snugly.
the front ring is for adjusting point of impact at a given range,,,its called a "parallax ajustment" it corrects for the scopes inaccuracies over its full range say from 10 yds to 100 yds there a bit of a pain on a hunting rifle as you need to focus them every time and that slows down your shooting, when only a snap shot will get the kill you cant wate to mess about focusing the darm scope so i never use them on my rifles,,unless im target shooing,, or im snipping when i have time to take my shot,,,
(a head shot only!) only a parallax scope is spot on aim from 10yds to infinity
As a general rule of thumb, If you have normal Weaver-type aluminum rings, you tighten to 10 to 15 inch-pounds. If you have normal Weaver-type steel scope rings, you tighten to 15 to 20 inch-pounds. If it's something exotic and/or expensive, you're pretty much stuck contacting the manufacturer. Leupold Mark 4's require 65 in-lb, for instance.
Wiha makes two adjustable torque screwdrivers (one for lower torque, and one for up to 60 in-lb that are perfect for most any scope ring applications.
Pretty much all rifle scopes have great warranties. Send it into weaver and i'm sure they will fix it plus replace any parts. I'm sure they will charge for missing parts but it would be best for them to look at it and check it out. TP