Originally Posted by
zimmer
Will still need a picatinny rail if using Zee rings (I love Zee rings). Or Weaver 2 piece bases.
I'm still concerned we are missing something here with this problem but I'm struggling to suggest anything different.
Maybe a faulty scope. Was it brand new?
Could rotate it 45 degrees anti clockwise and see if problem is the same. Windage becomes elevation.
If access to a collimator check scope has full range of adjustment available windage and elevation. Start by optically zeroing the reticle.
How much elevation adjustment was there left on the old scope when it was zeroed at 100 metres?
OP shouldn't have to fit a 20 MOA rail/bushed rings/coke tin packers to get a centre hit at 100 metres. Despite the scope having limited internal elevation in its design.