Farmboy, not going to argue but a shotgun is not a rifle. The position of your eye acts somewhat like a rear sight on a rifle. It doesn't matter how it shoots in a vice, you need to hold the gun naturally. I tried different shims and lining up the mid bead with the muzzle bead the same way each time produced different POI with different shims. Again, I am not pointing and shooting, I am sitting down with the gun rested on my knee and lining up the beads (just like you would while hunting). Tested each shim with at least 5 shots to confirm POI for that shim. I would encourage anyone who is having POI issues with SBEII to try this before concluding you have a problem.