Continuing the posts on the accurizing a Ruger 10/22 on a budget. The absolute best thing to do with a ruger 10/22 to get repeatable results is to improve the trigger. Less creep, less pressure, and a more crisp break makes a world of difference.
Now you could buy entire drop in trigger groups to replace the original trigger group, but most drop in trigger groups will cost as much or more than the gun itself brand new. Kits from KIDD, Volquartsen, Power Custom, and others will double the investment you have in your 10/22. The much cheaper and almost as good alternative is to stone your hammer, or simply replace it with a better one for 35 bucks. Buy the Volquartsen Custom Target Hammer
The hammer is manufactured with a much higher level of precision and quality than the OEM ruger hammer in the picture to the left. It includes shims and springs. I only replaced the hammer and shims, and did not use the included springs. A common recommendation from many others in the 10/22 world. The difference is night and day. Installing the Volquartsen hammer reduced the trigger pull resistance from approximately 6-8 lbs. down to around 3 lbs. This makes it much easier to control any unintended movement from pulling the trigger while shooting, and greatly improved accuracy and repeat-ability. Buy the Volquartsen Custom Target Hammer
How big a difference does it really make? The group on the 3″ Birchwood Casey Splatter target is the first 10 rounds I shot at 50 yards, with bulk ammo, after replacing the trigger. The group is decent for getting accustomed to what feels like a brand new trigger, and I have only continued to get it tighter with subsequent trips to the range. Between crowning, bedding, and replacing the hammer, I am now the weak point not inherent inaccuracy of the rifle.