My Savage 12 FV 223 is pretty close, it regularly shoots in the .5's or less in decent conditions. Multiple 5-shot groups on the same sheet of paper (3-shot groups are much smaller). It can do this with four different bullets and only one of those is something anyone would consider a "match" grade bullet, the others are varmint bullets with some of the worst BCs available.
*I am not a benchrest shooter and have never competed with a rifle. I only go to the range a few times a year to work up loads on targets or sight in.
Factory Savage 12 FV 223
26" original heavy barrel
Accutrigger
Flimsy plastic stock, bedded with Devcon, steel rod bedded into forend, and painted
Nikon Buckmasters 6-18x40
Leupold rings, lapped
Harris bipod
Rear bag
Hadn't shot this rifle in over a year, put the scope back on and fired these while sighting in. This is my old varmint load.
I just tried a new bullet this week. I fired two foulers and then four groups of 5 each varying by 0.5gr powder. All groups are in the 0.5's. I'll have to go back to 200 yards and test again. This rifle shoots better than I do.
This is an old target working up my old load. That's actually four different seating depths varying by 0.010".
I could tighten up the groups with a better scope, better stock, and better rests. But I use this rifle in the field to hunt varmints, I don't want a bulkier setup. I had a B&C Medalist stock on it for a while that rode the bags on a bench a lot better, but it felt too "big".