I would say not.
I would still expect at least an 1" to 1.5" at 100 yards with factory plinking ammo.
I have two 20" Bushmaster rifles that I bought pre2k. One is my DCM match rifle and the other is your standard 20" Hbar XM15. The DCM gun has a 1X8 barrel free-floated and the XM15 your standard 1X9 Bushmaster barrel.
Both guns have turned in groups of 1" with decent factory stuff, but are sub MOA with my match handloads. I would expect yours to do much better with a decent match type load. Something with a 75-77 grain bullet perhaps. My one in nine really liked the Hornady A-Max bullets.
An enlightened zeal for the energy and efficiency of government will be stigmatized as the offspring of a temper fond of despotic power and hostile to the principles of liberty.
Alexander Hamilton, author of Federalist No. 1. 10/27/1787