I bought my wife a 223 Handi rifle several months back. I wanted to get her a little rifle with a medium weight barrel which the standard handi has. From the factory the trigger was awfull so I took it apart and reworked the trigger. It now breaks at a clean 2 pounds. As with my 243 handi this rifle isn't a shooter. 2.5" groups at 100 meters.

I took the for-rend off and re-channeled the area in front of the retaining screw so that it is free floated. I glass bedded the area behind the screw. I also cooked up some reloads in the medium velocity range. It now shoots about an 1.25 to 1.5" groups. Still nothing to brag about. I have employed all of the standard handi rifle shooting tricks such as putting the rest under the action and holding the trigger back.
The rifle has a 1:12 twist so I have been loading Sierra 45, 50, 52 grain bullets using H335, 748, reloader 15, and IMR4198 powder. I have tried pushing the bullet out as far as it will go to seating it to factory specs. I have to say, I starting think I would have been better off getting her a savage!
What have I missed? What should I do next?