I have been trying to Zero my scope and find I cant get the vertical position is bang on where I want it but the horizontal is just off a very small amount. 1 click to the right is just a tad to much. Can you fit a shim to the side of a scope. Or am I beeter putting a shim on the side of the scope rail.

Using a Daystate Wolverine r in 177 with a Element Optics HELIX 6-24 x 50 side focus scope with 1/4 Mildot. Trying to Zero 35yds.

Just not 100% dead centre.