Welcome to the forum bubba. You came to the right place for answers, and support. The members here have a vast amount of knowledge on the mini.
(1) First thing is to break in your barrel. Common method is fire 1 rd then clean, (10 times), fire 3 shots, clean (10 times), then 10 shots ,and clean for the remainder of 100 rds (aprox 6 times). When I say clean, Use a copper cleaner. I use Hopies Benchrest #9. There are other good copper cleaners. I would stayaway from JB paste, and Sweets, as they are harsh. The Idea here is to smooth out the bore for the first 100 rds, and ya have ta keep the copper build up off or your just polishing the copper.
Note: I use a Tactical vinal coated cable with the patch pulled thru from chamber to muzzle, but you can make one from weed wacker, or heavy fishing mono. This saves your crown! You can also use a std cleaning rod if you use a bore guide. Don't forget to wipe the rod each time to remove the grit from the cleaning rod.
(2) Since each mini is different, you will be surprised how different ammo fires in your mini. I would select as many different brands, bullet wt, etc to see which shoots best in your mini. Some will group half of others.
(3) Install a muzzle brake. Its easy, and quick. Cost is under $20. It typically cut your groups in half.
(4) Bed the stock. Bedding my stock cut the average groups down 3/4", and got rid of the flyers. Cost is under $14 for Brownells acruglass bedding kit.
(5) Trigger job. A hard trigger pull is way too easy to pull the muzzle off target, no mater how slow you try to squeeze the trigger. Cost is $25 to $50. Most mini triggers are 7 to 9 lbs, a 3 1/2# will make a big diff.
If you do all the above you should be shooting 2" groups average or less.
Use the search button in the upper right for details on these items. Enter key words, and all related posts will come up. Hope this helps ya some.
AS far as the gas block, ya only need to remove, and clean it once a year or so. Gap it with a feeler guage to even the gap between halves, and use loctite blue on the threads. Tighten as you did before.
