Rifle Scopes larue OSR mount slipping????

[fastford]

i couldnt figure out why my ar10 kept loosing zero. went to the range saturday and as i was finishing up the day, i saw that my scope had slipped backwards all the way to the center houseing! Its a preimer 3x15 on it with the new larue osr mount that the scope sits in, like normal rings, not that side mounted style like larue usually has... Do i have a bad mount? i have mounted at least a dozen scopes and have never had this happen?
C

 

[Captain Kirk]

Re: larue OSR mount slipping????

Well, if the scope slipped in the rings, you may not have applied the proper torque to the ring cap set screws, its ben known to happen. Check LaRue's mounting instruntions, should be around 12-15 in/lbs

Kirk R

 

[fastford]

Re: larue OSR mount slipping????

they suggested to remount, at 30 inch pounds? sounds alittle ecxcessive???

 

[fastford]

Re: larue OSR mount slipping????

i mounted at 15 inch pounds with a torque wrench like i always do

 

[Outsydlooknin75]

Re: larue OSR mount slipping????

Go ask what to do over here

http://www.ar15.com/forums/forum.html?b=2&f=219

You will get the BEST answers there, as well as being called a liar and all kinds of other things.

 

[fastford]

Re: larue OSR mount slipping????

ill try, i just hate that board.....

 

[madd0c]

Re: larue OSR mount slipping????

I had Larue QD rings on a 308 bolt action, and the scope was moving at 15 inch pounds. Called Larue and they said to use 35 inch pounds. I also thought that was excessive, but I torqued it down to 35 and the slipage stopped.

Also, you say your scope is slipping backwards? The most common way for a scope to move with recoil in loose rings is forward.

The extra torque didn't harm my 3.5-15x50 NF NXS. How do I know? After I worried about what the 35 inch pounds was doing to the scope body, I got badger rings and remounted it. The Badger mounts to 15 inch pounds and I have had no slippage problems.

madd0c

 

[livetohunt]

Re: larue OSR mount slipping????

I would not torque the rings to 35 inch pounds with that scope.

 

[SGDM]

Re: larue OSR mount slipping????

Insure you have the right rings. Some come with 34mm rings with inserts for a 30mm. Yep, 35 is too much.

 

[sobrbiker883]

Re: larue OSR mount slipping????

Mkae sure you tighten the screws in the order LaRue specifies as well. I had problems before by not consulting the little hispanic guy (manuel)......

 

[vmpglenn]

Re: larue OSR mount slipping????

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: sobrbiker883</div><div class="ubbcode-body">Mkae sure you tighten the screws in the order LaRue specifies as well. I had problems before by not consulting the little hispanic guy (manuel)...... </div></div>

The OSR mount (LT111) and other newer scope mounts from LaRue no longer use the vertical split ring design -- so the order in which you tighten the screws is not an issue.

That having been said, I have an LT112 (OSR mount with 20MOA slope built in) on my Barrett 98B .338LM and will see what happens to my NF F1 over time. So far, so good...

 

[sobrbiker883]

Re: larue OSR mount slipping????

My bad, should have researched bfore typing......