I have a Williams Peep on my Omega and everything mentioned above I have found to be correct. My peep is all the way up on the ramp. I left my factory rear sight on and it holds real tight like that. I shoot a 2" MOA with this peep at 100yds and keep my front bead right on my mark. (Bench Shooting at a range) I use 110gr. BH209 and a 290gr. Barnes TMZ. I am very confident out to 100yds. I have tried 150yds but my group opens up a bit. Still in the kill zone but I just hope I am not presented with that long a shot with my ML. At 100yds off hand I shoot well but at 150????????Shooting Sticks or a tree branch would be my best option to take an ethical shot. Unless I can squeeze off a shot from the prone position.