numaone
Member
Is there a webpage calculator that can tell me the minimum height that my scope rings need to be for a given tube size and main objective size, and base cant?
Barring that, can someone check my math? I have a 30mm tube with a 50mm main objective. That means that 50-30=20mm sticks out of the scope rings. Dividing that in half gives 10mm between the bottom of the scope ring hole and the barrel. So my rings need to be 10mm high for clearance, right? That number doesn't include the thickness of the base, which will help.
Just to add a little confusion if I did the previous calculations correct, I'm looking for a 20 MOA canted base, so it no longer runs parallel to the barrel. a 20 MOA is 1/3 of a degree. The tangent of 1/3 a degree is small, but not negligible. Multiplied by 7 inches (the estimated hang-over length of the scope), and then converted to millimeters gives just over 1mm that I need to account for.
So I need a total of 11mm from the bottom of my ring to the bottom of the hole in the rings?
Barring that, can someone check my math? I have a 30mm tube with a 50mm main objective. That means that 50-30=20mm sticks out of the scope rings. Dividing that in half gives 10mm between the bottom of the scope ring hole and the barrel. So my rings need to be 10mm high for clearance, right? That number doesn't include the thickness of the base, which will help.
Just to add a little confusion if I did the previous calculations correct, I'm looking for a 20 MOA canted base, so it no longer runs parallel to the barrel. a 20 MOA is 1/3 of a degree. The tangent of 1/3 a degree is small, but not negligible. Multiplied by 7 inches (the estimated hang-over length of the scope), and then converted to millimeters gives just over 1mm that I need to account for.
So I need a total of 11mm from the bottom of my ring to the bottom of the hole in the rings?