CZ457 Pro Varmint with McRee chassis (not considered a light weight). This one came with a test target group 11mm at 50 meters. I have not fired it yet. For a little less cash you can get a Ruger American Rimfire and get a half inch at 50yds depending on ammo.
Eat Mac and cheese until you can pony up for a CZ457 varmint or pro varmint, or go with Ruger American Rimfire 8348 or 8367. All four should do 1" at 50, all mine do. With the CZ you're also going to kick in another $100 for the area 419 scope base.