So I have a Begara B14R with a 30 MOA base and a Vortex Strike Eagle mounted. I’m zeroed at 50yds and I still have 6.3 MILs I can dial down. I would like to get out as far as I can so I decide to get a Bobro 20 MOA scope mount which should take up another 5.8 MILs. When I tried to zero I dialed all the way down and I was still 5.3 MILs above my crosshairs. I can’t figure out what happened 
Any ideas?
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Any ideas?