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Sanity Check: 20MOA Cant Mount with Sig Sierra3BDX (40H/40V MOA adj)
#5
MegaHurtz, As LR55 has stated, if you want to shoot past 700 yds with just about any load, you need some sort of ramp style scope mounting rail. 20 MOA is most common, but there are others. Be aware that the scope centerline height comes into play here. At say 300 to 400 yds, you can use just about any setup and make it work; however, to stretch out 700 to 1000, everything must play well together. So your scope centerline height is a factor in your come up calculations.

Frankly, 40MOA of total adjustment doesn't sound like very much. My SWFA SS 10 x 42 Milquad has about 36 Mils of total adjustment (~ 124 MOA) and according to JBM, that is barely enough to reach 700 yds. You have a very good range finder, but maybe not the one that you really need. To get the most out of it you must now design a setup around it to achieve your long range goals. BTW, Applied Ballistics has some very good articles by Brian Litz. According to them it becomes very difficult to hit anything past 600 or maybe 700 yds with a cartridge such as the Grendel. Your estimation of the wind, range, DA, mv, etc have to be spot on (as in less than 1% error) to achieve a 95% hit ratio. Just to let you know that your expectations might be a little unrealistic. Mine were too, so I have pulled back my goal to ~600 yds. max.

So your ring height, rail thickness, and scope diameter must be considered.
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Sanity Check: 20MOA Cant Mount with Sig Sierra3BDX (40H/40V MOA adj) - by Sinclair - 11-16-2019, 08:45 PM

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