Torque settings for FX no limit rings and PCP in general

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Regal_US

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May 17, 2015
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MD, United States
After searching AGN I could find not many posts with clear instructions for torque settings; maybe that's the way it is, but if people have specific information related to FX no limit rings please share. In addition to the ring torque values for the 4 mm bolts, what's recommended for the single 5 mm screw that adjusts the pivot angle, and for the pair of 4 mm bolts that clamp onto the 11 mm dove tail rail?

What I have found from web searches is that for rings, scope manufacturers ​(Leupold 15-17 inch/lbs) and Sightron (15-20 inch/lbs) suggest lower torque values than say a high quality ring manufacturer such as Sports Match (30 inch/lbs for 4 mm bolts). This makes sense if scope manufacturers go lower values to avoid tube damage claims. The general Wheeler recommended value for rings seems to be 20 inch/lbs. For the rail, Sports Match suggest 41 inch/lbs for 4 mm and 66 inch/lbs for 5 mm screws, which seems a lot for a PCP.

Anyone care to share values for FX no limit rings, which seem to be the only choice for scopes with large aperture lenses (Sightron S111 60 mm, and Hawke 10-50 x 60 Sidewinder ED)?
 
Once again I come shining in with my ignorance. I just bought an approx 240$ torque wrench (Hazet 5107) and checked my hand-set torques on my optics.

It seems I had my scope rings set with less than 6in/lb and I had still always carried the gun from the scope without changes to zero.

The minimun it can go is 5,3 in/lb and it still was threading them in.

I would say 15 in/lb is well enough for scope rings. I have 34mm tube scope on SPUHR mount and 15 in/lb is enough on it too. IMO in the end it only needs the resting friction to counter the recoil/bumbs. But resting friction is a bi**h since when it goes over it, it slides like a santa in the snow.

Btw: I originally used finger tightening tactic for the scope rings and it looks I got very repeatable torque values.

For the pivot angle I had set at a hint over 37 in/lb

I just set the pivot screw again at 30 in/lb and tried to rip it with force. Not a budge.

The mounting screws to the rail I used force before even testing the torques. I pulled hard, trying to slide the mount down the rails in to my lab but it did not move. Other one of the stock screws cave a rather nasty sound but nothing broke.

Those rail screws were set at 10 in/lb.

So all in all, if you are not going to war with that gun or planning to chase the squirrels to death if you run out of air, you are going to do well even with sub-optimal torque values.
 
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