I had the EoTech XPS 2-2 and was fine for what the BO is. If I remember correctly, my 110gr supers zeroed at 100 yds on the top dot had the 220 subs were really close on the second dot, +/- an inch. Considering the size of target and range the cartridge is designed for, I felt that magnification wasn't really all that necessary. I traded my last 300 BO upper and just finished another build and am trying to figure out if I want to go back to the same optic or maybe something like Skinny has. Maybe another PST 1-4 or an Aimpoint.