Just got Sb PMii and put in barrett 98B. After sighting in at 100yds I noticed that I had dialed my windage all the way to the right. I was also in second round of elevation. When I took look, the scope had moved back in its mounts. I have barretts exrings and torqued them to the specified 35in/lbs. Anyone able to offer info as what to do?
Rifle Scopes Scope movement in rings
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Re: Scope movement in rings
He's talking about the scope sliding inside of the rings, not the mounts sliding on the rail. The ring specs call for 35 in/lbs.
If you properly followed the instructions and your torque wrench is working right, I'd say contact Barrett for an exchange. Sounds like your rings are oversized.
He's talking about the scope sliding inside of the rings, not the mounts sliding on the rail. The ring specs call for 35 in/lbs.
If you properly followed the instructions and your torque wrench is working right, I'd say contact Barrett for an exchange. Sounds like your rings are oversized.
Re: Scope movement in rings
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: KeithR41</div><div class="ubbcode-body">Learn grammar to start then torque to 65 in. Lb.
Good luck with that.
</div></div>
well, seems like English might be his second language. And yes, if your running out of windage its most likely the ring bases. Double check the torque specs on them and they will probably be around 65in/lb for bases and approx 35in/lb for the actual rings. And depending on the quality of your torque wrench, you may want to check that as well since your rings obviously arnt tight enough.
sounds like its all wrong.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: KeithR41</div><div class="ubbcode-body">Learn grammar to start then torque to 65 in. Lb.
Good luck with that.
</div></div>
well, seems like English might be his second language. And yes, if your running out of windage its most likely the ring bases. Double check the torque specs on them and they will probably be around 65in/lb for bases and approx 35in/lb for the actual rings. And depending on the quality of your torque wrench, you may want to check that as well since your rings obviously arnt tight enough.
sounds like its all wrong.
Re: Scope movement in rings
First off, 35 in/lbs is correct for the cap screws. 65 in/lbs is for the cross bolts holding the rings to the rail.
Did you clean everything off before you installed the rings? I'd disassemble it, wash your hands, clean the scope body and rings with Windex and a microfiber cloth, and reassemble per the directions found here...
Exrings
Then click on "Owner's Manual".
These rings should be more than capable of holding your scope - if installed properly.
First off, 35 in/lbs is correct for the cap screws. 65 in/lbs is for the cross bolts holding the rings to the rail.
Did you clean everything off before you installed the rings? I'd disassemble it, wash your hands, clean the scope body and rings with Windex and a microfiber cloth, and reassemble per the directions found here...
Exrings
Then click on "Owner's Manual".
These rings should be more than capable of holding your scope - if installed properly.
Re: Scope movement in rings
I installed the scope with Pinsd. We followed the exrings instructions to the letter. We also used a brand new CDI torque screwdriver on the cap screws. The torque on the cap screws was spot on at 35 in. lbs. The only thing we did not do was clean the rings surfaces and scope tube with a solvent. I wiped them down with a cloth but did not clean them with any type of solvent. If anything this is most likely the cuplrit... unless the rings or scope tube are that out of specs.
What do you all think of these additions to the mounting process?
1. Clean scope tube and ring surfaces with acetone?
A. Wipe a small amount of rosin on the inner ring surfaces to add some grip to them?
I have read of people using loctite on the ring surfaces as well but not sure that would actually aid in increasing the grip of the rings on the tube. Also have heard of people using a 3m product. Think it was called skotchkote??
Thanks for any assistiance provided to Pinsd and myself.
I installed the scope with Pinsd. We followed the exrings instructions to the letter. We also used a brand new CDI torque screwdriver on the cap screws. The torque on the cap screws was spot on at 35 in. lbs. The only thing we did not do was clean the rings surfaces and scope tube with a solvent. I wiped them down with a cloth but did not clean them with any type of solvent. If anything this is most likely the cuplrit... unless the rings or scope tube are that out of specs.
What do you all think of these additions to the mounting process?
1. Clean scope tube and ring surfaces with acetone?
A. Wipe a small amount of rosin on the inner ring surfaces to add some grip to them?
I have read of people using loctite on the ring surfaces as well but not sure that would actually aid in increasing the grip of the rings on the tube. Also have heard of people using a 3m product. Think it was called skotchkote??
Thanks for any assistiance provided to Pinsd and myself.
Re: Scope movement in rings
I don't think you want to be using acetone - that's a pretty harsh solvent. Windex will clean off grease/oily film, and won't damage your scope if you accidently get some where it doesn't belong.
Don't even think of putting Skotchcoat on it. Kind of like tar that skins up when it sets. That's the crap ET's smear on things like shipboard antenna connectors to weatherize them. And growler earpieces and toilet seats - watch out for that.
If you had to put anything on the tube, I'd use blue Loctite, as you can clean it off and it won't damage anything. Get your scope leveled quickly, and use a swab to clean off any residue.
A CDI torque driver is a top of the line tool, so you should be good there.
I'd try cleaning everything good first, and if that doesn't work, go the blue Loctite route.
Wouldn't think the scope or rings would be out of spec. If you are able to apply torque to the ring caps without them bottoming out (on the non Zero-Gap side), you should be good.
I don't think you want to be using acetone - that's a pretty harsh solvent. Windex will clean off grease/oily film, and won't damage your scope if you accidently get some where it doesn't belong.
Don't even think of putting Skotchcoat on it. Kind of like tar that skins up when it sets. That's the crap ET's smear on things like shipboard antenna connectors to weatherize them. And growler earpieces and toilet seats - watch out for that.
If you had to put anything on the tube, I'd use blue Loctite, as you can clean it off and it won't damage anything. Get your scope leveled quickly, and use a swab to clean off any residue.
A CDI torque driver is a top of the line tool, so you should be good there.
I'd try cleaning everything good first, and if that doesn't work, go the blue Loctite route.
Wouldn't think the scope or rings would be out of spec. If you are able to apply torque to the ring caps without them bottoming out (on the non Zero-Gap side), you should be good.
Re: Scope movement in rings
Thanks for the feedback and information. We will clean scope tube and rings thoroughly and if that does not work try some blue loctite.
Thanks for the feedback and information. We will clean scope tube and rings thoroughly and if that does not work try some blue loctite.
