Solid slug are illegal unless you've got a FAC with them listed on there.
Not a clue why some people are going off on random tangents either.
Go somewhere and either try some different guns that fit or some adjusters on yours.
If you shoot better then look into it further , if not just put your hands up n admit your a shite shooter lol, I admitted this long ago but still have a good days shooting on something now n then.
Good luck pal