UM rings with SWFA scope

[rclouse79]

I am getting ready to install a 3-15 SWFA scope with the UM tikka rings. SWFA recommends 18 in lbs and UM recommends between 25 and 30 in lbs. I called SWFA and they said to go with the ring manufacturer recommendation. I am just hoping for some piece of mind based on what other people have done with this combo, as I will be sad if I damage the scope. Thanks in advance!

 

[Schmo]

Roll per instructions that come with the UM rings. That’s what I just did on my SWFA 3-15. No problem

 

[rclouse79]

Roll per instructions that come with the UM rings. That’s what I just did on my SWFA 3-15. No problem

Thanks. I am a weenie when it comes to my new toys.

 

[Drenalin]

Not with UM rings, but my one SWFA scope is torqued on to 25.

 

[LongWayAround]

I torqued my 6x to UM specs.

 

[PathFinder]

25 in/lb will be just fine. Both of mine are torqued to 25 with no issues.

 

[NWBLKTAIL]

Roll per instructions that come with the UM rings. That’s what I just did on my SWFA 3-15. No problem

What height did you order? I had brass ejection issues with Sportsmatch TO84 on my 3-15 gen 1

 

[rclouse79]

What height did you order? I had brass ejection issues with Sportsmatch TO84 on my 3-15 gen 1

I did the low per their recommendation. What sort of issues?

 

[NWBLKTAIL]

I did the low per their recommendation. What sort of issues?

Hitting the windage turret and ending up back in the chamber, unless I mounted it in a very uncomfortable position to avoid it.

This was a Gen 1, Gen 2 has those capped turret which would mitigate the issue

 

[pods8 (Rugged Stitching)]

The torque specs depend on the screws used in the rings, thus the ring manufacturer recommendations should be used on any decently built scope.

 

[Formidilosus]

25 in/lb will be just fine. Both of mine are torqued to 25 with no issues.

25in-lbs in the UM rings with the larger screws is the equivalent clamping force of Nightforce UL rings at approximately 16 in-lbs.

The clamping force put into the scope is dependent on the size and pitch of the screws used. 25in-lbs isn’t 25in-lbs on all rings.

 

[PathFinder]

25in-lbs in the UM rings with the larger screws is the equivalent clamping force of Nightforce UL rings at approximately 16 in-lbs.

The clamping force put into the scope is dependent on the size and pitch of the screws used. 25in-lbs isn’t 25in-lbs on all rings.

That's a good point...Assuming they're 8-40 screws, and standard is 6-48, it would take ~30 in/lbs to match.
Are those screw sizes correct?

 

[Formidilosus]

That's a good point...Assuming they're 8-40 screws, and standard is 6-48, it would take ~30 in/lbs to match.
Are those screw sizes correct?

I believe so, yes.