Howa 1500 or Weatheryby Vanguard. I have a Vanguard VGS 20" light sporter barrel in .223 I bought back in 1996, that will shoot 3 round groups of one .224 hole at 100yrds. The hole just gets a bit larger after 3 rounds as the barrel gets hot. 5 round groups average in the 1/4" range. A 1/4 or better MOA rifle for $500.00 I know how lucky I am.
I have made a lot of money off that little rifle, back in my first enlistment. I use to tell other Marines how accurate it was and when they called BS I would offer a friendly wager, go get it, take them to the range and then take their $$$.
While not every 1500 or Vanguard will be this accurate, every one I have seen was very very accurate once you found a load it liked and better than average with almost any load. I have personaly never seen a dog come from Howa. They make as good of a rifle as you can buy for that kind of money.
Will