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How to determine proper ring height

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: October/28/2010 at 10:33
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Chief Sackscratch

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what are you putting this on?

Edited by SVT_Tactical - October/28/2010 at 10:34
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: October/28/2010 at 12:22
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17'' of ar15 rail space.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: October/28/2010 at 13:01
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think i know what i did wrong, the +12.7 is in addition to the ring size not the objlens diam.

so it would be 50/2 = 25objlens + 3lenscover = 28mm.
 
compared against 27.686mm (1.09'') + 12.7mm = 40.386mm.  so these are actually around 12mm taller than needed?  I would want around 30mm for this application.

medium rings would be 17.7038mm (.697'') + 12.7mm = 30.40 compared to 28mm, with a nice buffer.
or am i losing it again Loco
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/01/2013 at 16:27
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Here's a calculator I made recently. Hopefully this will help all future readers. Comes with many modern scope and ring height preset values. Also accounts for Butler scope cover and scope mount cant.

http://www.mil-rad.com/scope_ring_calculator
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/17/2013 at 11:39
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Greetings!!
This is my first post.
 
A 50mm Objective bell on a 30mm tube holds a simple example for proper ring height.
50mm-30mm=20mm/2=10mm That is how high the bottom of the tube will be when the objective bell is leveled on a flat surface.  Thickness of your base, plus the B measurement of the rings, bottom of ring to the lowest point inside the lower ring, (where the tube rests), obviously must exceed 10mm. How far beyond lifting the bell more than 10mm is the key. That clearance is up to you but I would concur with Chris.  This method can also be used with 1" tubes when converted.

Hope this simplifies


FelixV
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