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Zeroing & torque on my scope mounts

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/18/2013 at 14:19
jdnan View Drop Down
Optics GrassHopper
Optics GrassHopper

Joined: September/23/2013
Location: Texas
Status: Offline
Points: 20
I recently purchased a couple of Optisan Mambas 1-4X24 with the PEPR style mount that comes with them on (

I purchased the first one, quickly sighted it in at 50 with 5 or 6 shots, liked it so much that I bought a second that was on the sample list for an even better deal.  I finally got to the range to sight the second scope in and then fine tune them both at 100yds.  When I got to the 100yd range at my club, after shooting several rounds through the first rifle, I noticed that my groups suddenly started getting quite large (5-6 inches, +), regardless of ammo used.  I tried the second one & noticed the same phenomenon after several rounds.  It was too much of a coincidence for this to happen on two rifles with two scope, so I guessed that because I didn't have a torque screwdriver, I was too careful not to over tighten the rings & must have left them too loose.  I would like feedback and I have 3 questions:

1. I purchased a Wheeler Fat wrench & torqued the screws to 15 in-lbs (they were too loose, by the way).  Is this the proper setting based on other's experience?

2. What torque setting should I use for mounting the mount to the rail?

3. Is this a reasonable explanation as to the loss of accuracy?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/18/2013 at 14:37
Sparky View Drop Down
Optics Master Extraordinaire
Optics Master Extraordinaire

Joined: July/15/2007
Status: Offline
Points: 3145
This post may help with the torque specs.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/19/2013 at 08:57
Chris Farris II View Drop Down

Joined: August/13/2007
Location: United States
Status: Offline
Points: 3063
I would torque them all down to 18-20 in-lbs and being to loose could cause accuracy issues. Did you get the regular PEPR mount or the quick detach? What did you torque the side nuts to if you dont have the QD version? By the way they should be 65-in lbs.
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