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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Scope clamp screw torque on ARC M-brace rings with a Sightron SVIII 5-40x56.
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<blockquote data-quote="ETXshortrange" data-source="post: 3018725" data-attributes="member: 111083"><p>Hello,</p><p>Is anyone using this ring and scope combination. If so, what torque are you using on the single scope clamp screw?</p><p></p><p>ARC installation instructions are to use 55 inch pounds on the single scope clamp screw. Sightron mounting instructions are to limit scope clamp screw torque to 15 – 18 inch pounds. The Sightron supplied rings have four clamp screws. According to information on various internet forums, the total clamping force of the Sightron supplied rings is between 60 - 72 inch pounds. I contacted Sightron customer service and they stated "We recommend 15 to18 inch pounds. At 55 inch pounds the focus will not work." I plan to use this scope and ring combo on a 300 win mag and do not know if 18 inch pounds on the single scope clamp screw will be sufficient to prevent slippage.</p></blockquote><p></p>
[QUOTE="ETXshortrange, post: 3018725, member: 111083"] Hello, Is anyone using this ring and scope combination. If so, what torque are you using on the single scope clamp screw? ARC installation instructions are to use 55 inch pounds on the single scope clamp screw. Sightron mounting instructions are to limit scope clamp screw torque to 15 – 18 inch pounds. The Sightron supplied rings have four clamp screws. According to information on various internet forums, the total clamping force of the Sightron supplied rings is between 60 - 72 inch pounds. I contacted Sightron customer service and they stated "We recommend 15 to18 inch pounds. At 55 inch pounds the focus will not work." I plan to use this scope and ring combo on a 300 win mag and do not know if 18 inch pounds on the single scope clamp screw will be sufficient to prevent slippage. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Scope clamp screw torque on ARC M-brace rings with a Sightron SVIII 5-40x56.
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