I really like the Holosun 507C X2 Green with either the circle-dot or ACSS.......
Circle-dot is great but not as quick as the ACSS from awkward field positions......maybe better for a 22 or carbine.
ACSS carrot when centered properly.....helps with hold-over out to 100 yards
Genius large circle for centering the reticle quickly from tough positions.....naturally intuitive to acquire.