I doubt that there has ever been another mass produced rifle of the lower price end that has had as high a percentage of incredible shooters, although Savage would probably come the closest. I just traded off a 243 788 that would go under half inch regularly if I did my part. Hated to see it go but I traded it for a LH 788 in 6mm Remington. Haven't shot it yet but the former owner claimed it is a shooter as well.
I have heard that one thing that helps the accuracy is that the 788 has a very fast lock time and that the receiver itself is quite stiff. Don't know if those are facts but the proof is in the bug hole groups!