Even with the changes, the answer is still yes. I'll start with one of my 308Win in a 26" barrel weighing in at 11 1/2 # with scope. It is very consistent with 155 and 168 AMAX in the .3-.4" five shot groups. Many years ago, I had an old Rem 700 in 308 Varmint that shot 168gr Sierras into similar .3" groups, and I still have an old FN 270W that loves a load of 4831 and 130gr Speers and shoots well under .5 moa.
My 260AI comes in at about 11#, and it has no problem staying under .5 moa
I have a factory Remington Sendero in 300 RUM that I lapped barrel and lugs, polished the trigger and built a 180gr AB load with Retumbo that will shoot sub .5 moa.
Over my decades, I have owned and seen far too many rifles and loads that would shoot under .5 moa, and several of those began life as a factory rifle that only had a few smith tweaks and good load development.