Drop Shim Help Needed

[Trentnel]

Can someone breakdown the drop shims for me like I’m an idiot?  I have a M2 and SBE3 (both 12ga) and both are shooting 6-9 inches high. What shim gives the most drastic drop?

[Steve Rose]

More stock drop equates to a lower POI relative to your eye. The higher the number on the shim (50,55,60,65) set up the more drop in the stock (ie the butt of the stock moves lower on the gun).

Changing the shims does not really change where the guns shoots. What it does accomplish is change where you naturally point the gun when you shoulder it.

 

[Trentnel]

So the “c” combo is going to give it the most drop, correct?

[Steve Rose]

2 hours ago, Trentnel said:

So the “c” combo is going to give it the most drop, correct?

Yes

[remarkable]

 

Both of your guns were shipped with D Drop Ship Plates and D Drop shims, I wouls start with the D Drop Shim Plate in both guns and then revisit the patterning board.   The goal is to be looking down a flat rib , mid bead covering or slightly under the front bead.