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Rifles, Reloading, Optics, Equipment
Gunsmithing
Help! M77 ring halves mixed up ...
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<blockquote data-quote="LoneTraveler" data-source="post: 1053466" data-attributes="member: 77249"><p>Take the rings and see if there is any matching angles or machine marks that will identify the correct position of each ring half. Snug the screws down and then check with a inside micrometer or dial caliper. to check roundness. It won't be perfect round as they insert shims between the halves when machining to allow space to solid clamp the scope tube. Angle measurement should match in and X at a 45o angle to the half slot. Feel to see if there is any inside off set in the matching of the halves. I got a set of the pointed sets of alignment points in a Torque Wrench set like shown in the U-tube. The rings must align on the same vertical and horizontal plane. Since a scope does not have a 360 swivel in middle of the tube. Use the full straight solid bar to align the rings. A M77 because of the offset in the receiver bridge make sure the tall base ring is on the back bridge of the action. </p><p> </p><p>When I work with a new set of scope rings. I remove all cap screws except one and swing the cap off to the side and very careful on the match flats make 1 small mark on both halves that is visible. Take the 2nd ring and remove screws except one and swing cap to side and mark this ring with 2 small marks on the flats. Now just match the marks on the flats. Caps are now matched to ring and ends are matched.</p></blockquote><p></p>
[QUOTE="LoneTraveler, post: 1053466, member: 77249"] Take the rings and see if there is any matching angles or machine marks that will identify the correct position of each ring half. Snug the screws down and then check with a inside micrometer or dial caliper. to check roundness. It won't be perfect round as they insert shims between the halves when machining to allow space to solid clamp the scope tube. Angle measurement should match in and X at a 45o angle to the half slot. Feel to see if there is any inside off set in the matching of the halves. I got a set of the pointed sets of alignment points in a Torque Wrench set like shown in the U-tube. The rings must align on the same vertical and horizontal plane. Since a scope does not have a 360 swivel in middle of the tube. Use the full straight solid bar to align the rings. A M77 because of the offset in the receiver bridge make sure the tall base ring is on the back bridge of the action. When I work with a new set of scope rings. I remove all cap screws except one and swing the cap off to the side and very careful on the match flats make 1 small mark on both halves that is visible. Take the 2nd ring and remove screws except one and swing cap to side and mark this ring with 2 small marks on the flats. Now just match the marks on the flats. Caps are now matched to ring and ends are matched. [/QUOTE]
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Help! M77 ring halves mixed up ...
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