josephmaxwell

Several years ago I spent an after out doing a fitting with my Ultralight and that is what shim ended up giving me a point of aim equal to my point of impact at 15 yards. With the ultra light, the sight picture is essentially the mid bead completely covering the front fiber optic and no visible rib. Imagine looking at a ball sitting on top of a flat line. I took my M2 with the D drop shim and Dx cast shim installed yesterday and performed a similar test (15 yards, mount the gun, fire) using a full choke. My sight picture with the D drop shim on the M2 has the front fiber optic cut in half by the back of the rib with only the top half showing to my eye. With the bullseye of my target sitting right on the top of the half of the front fiber optic I can see, the impacts are still between 3 and 5 inches high. Weather permitting I'm going to take the gun back out this week and put it in a led sled at 15-20 yards and shoot it without a choke installed and see if maybe the barrel is shooting high. All of my other benelli's past and present have had the poi shift in the appropriate direction as I changed the shims (i.e. changed the way the front bead is presented to my eye).

I figured out the problem and I'm an idiot. The DX Cast shim was stuck to the C drop shim because of some oil from the factory between the two. I was able to separate them and then follow the instructions per the manual to install the D drop shim to the DX cast shim and get everything put back together.

Installed in my new M2 currently are the DX plastic shim and the C DX plate.

I’ve attached photos of the shims from my older Benelli ultralight which match up with the design of the shims in the manual and your description. I’ve also attached photos of the shims that came with my new M2 laid out on my desk. As you can see, they are different.

I recently purchased a new Benelli M2 right handed with the updated receiver and buttstock. When I got the new gun and took it to the range it was patterning a good bit high for my taste so I wanted to drop the POI down by switching to the C or D drop shim. Based on the instruction manual it says that I will have to stack both the DX cast shim and the C or D drop shims between the back of the receiver and the buttstock and then install the corresponding cast/drop plate in the buttstock. However, my shims are not designed in a way to properly stack on top of one another. They have all male pegs on both sides of the plastic drop shims. Is the manual that came with my gun outdated and the new M2 just needs to have the C DX metal plate and the C shim? My gun came with the following plastic shims A, B, C, DX and metal plates Z DX, A DX, and C DX.