Absolutely, whats 'acceptable' accuracy from a carbine, designed in wartime and initially as armament for rear echelon troops?
I would say being able to to hit a man sized target at 100yds is acceptable and being able to keep heads down at 200 + is good enough.
It was only later when wartime demands thrust the Carbine into first line issue that accuracy became a thing to considered and soldiers facing very angry men, quite naturally expected to be able to reach out and give opponents the good news (from a good distance) with a rifle, even if its a carbine....