Welcome rugg, there is a lot of info on accurizing the mini in this forum. I would:
(1) Find the ammo YOUR mini likes
(2) Install muzzle brake 19.95
(3) Bed stock 14.95
(4) Trigger job (25.00 to 45.00)
(5) Install smaller gas bushing 25.00
(6) Scope it
Document your average group size before, and after. You will be pleased.
Then if you aren't grouping 1 1/2" to 2" at 100 yds. using a sand bag or bipod, work on your marksmenship, to catchup to your rifle.
Tip, use the search button in your upper control panel, type in key words, for example Muzzle Brake, all posts dealing with your key words will come up, with key words, in RED.