I happen to have a few 223s. The Remington bull barreled gun is very accurate. But I have a 223 Sporter and for all intents and purposed it is about as accurate as the heavy gun. I haven't shot it in any long sessions so the light bbl might wander a bit as it got a bit hotter. But that won't happen here now. Coyote times here now so I use my Bushmaster Varminter. Even if you shoot it alot..it won't get too warm at 0 or below
I have a friend with the Savage in 223 and he is very happy with his. It does have an accu trigger too