I don't think it much matters the exact application the 22 rimfire range for most applications is under 50,
Stay away from the bigger dots, the burris has a minute and if you could find some of the old Luepold gilmore's they have a 2 minute dot, I would like to find another dot scope that had 2 minute dots of good quality,
I have bought a couple burris fast fire's because the previous owner doesn't take the time to get used to it, they thought it was instantly going to make them a better shot but it doesn't it can enhance your sight picture but you still have to do everything else right