Ultimately, it really boils down to the 90% between the ears. That's all that counts.

Back in the 70s Robert Kleinguenther imported Voere Titan II barreled actions and built custom rifles out of Seguin Texas. He guaranteed 1/2" accuracy with standard cartridges and 1" with magnums. IMO any custom rifle that shoots worse than that is nothing but a POS- no excuse for anything worse today.