I really wish there were a way available to us to ascertain the absolute accuracy of a rifle.
My best Ross has shot bullets-touching groups at 100 yards almost every time it has been shot seriously. That's with the factory iron sights. The ammo is nothing special: a Sierra 180 Pro-Hunter backed by 35 grains of IMR-4895; it gets about 2335 ft/sec from that long barrel, but the rifle likes it. Recoil is mild. Seating, BTW, is to the length of a standard Ball round: 3.05".
My thinking is that a good Ross, with ammunition it likes, well could be the single most accurate rifle ever adopted as a military standard.
"Spray and pray" it definitely is NOT.
That is one super-impressive rifle, TWINCAMHARLEY. Thanks very much for showing.