When I go to the range to try out new guns, how exactly should I practice?

I am trying to judge which first gun would be nice, and following the advice here, I'm probably going to rent a few of the guns I can in one caliber.​My question is more about what exactly should I do when I am in the range? I know the basic rules since I've been at ranges a couple of times (purely for fun so not following/testing any exact scenarios).​How do I know which one is the 'best' of them all? Comfort? Groupings?Speaking of groupings, do I practice at certain distances?any tips? via /r/CCW https://ift.tt/2yAuoZc