Spend the money for the gun that you want, if you want accuracy 20” heavy barrel (or longer) if you want an entry gun 16” M-4 style. You will get what you put into the gun. Biggest thing people don’t look at is “Twist rate” mine will not shoot 55, will make do with 60’s loves 68, ok with 75’s. you will get out what you put into the effort.
Lot's of knowledge in that post.
I find my expirience to mirror that post as well. My 1:9 prefers 62 Grain pills while my 1:7 prefers 69 Grainers. Each rifle and it's barrel is an individual. One has to treat them as such.