The best barrel is always under contention, and accuracy is highly dependant on the shooters ability.
IMHO, most handi rifles accuracy is/are greatly improved with hand loaded ammo, I spent alot on factory stuff just to have mediocer results.
Out of the box factory rifles are gar-un-teed, to get 2" at 100, that's ruffly 2xmoa. With the accurizing tips in the faq's and Hand Loading,,groups can be sub MOA with these thing's.
That said, my best shooting deer size rifle is the 7-08, with the 308 not far behind, but that one is still a work in progress, It's been too hot this past few months to do any real load development