Red Dot Tube Size & MOA Dot

[Coltlover]

I would like to get a red dot sight for my 10/22 to use in Steel Challenges @ my local range. What size tube/abj. lens, would be better (larger vs smaller) and what size of dot is best?

[GLShooter]

I would like to get a red dot sight for my 10/22 to use in Steel Challenges @ my local range. What size tube/abj. lens, would be better (larger vs smaller) and what size of dot is best?

I prefer a 30 MM tube. Dot size in the 2 MOA to 4 MOA range. I think anything bigger will just result in lost targets.

Greg