I don't know if they are really "tack drivers," but here are my two precision rifles.
A custom built AR-15 and a Ruger Precision Rifle in 6.5 Creedmoor. I'm fairly new to the precision / long-distance discipline. But, I'm having a LOT of fun with it, so far.

NRA Certified Pistol Instructor | Certified Range Safety Officer | NRA Patron Life Member