RE: max range
A suggestion on testing your max range: Take your very first shot of the day at your max range and see if it hits where you want. Likely, your very first shot of the day will be on a deer during hunting season and if, during the offseason, you can consistantly nail your first shot at your max range then you should be comfortable doing that inseason also.
Another thing to do if you are practicing is split your sessions. Have one in the morning and then, in the afternoon practice "deer shots", single shotsout toyour max range where each one must be a kill shot.
Our max ranges should be the one that we can consistantly make as our first shot of the day and not the one we can make after practicing with 30-50 shots beforehand.