I'd have to be at home to check, but as I recall, accuracy requirements were not spec'd at 100 yards. The Carbine was expected to shoot reasonably well at 300 yards. However, Internet rumour(as in Wikipedia) says between 3 and 5 inches at 100 with military issue ball ammo.
The CMPicon .pdf talks about ammo and how to get a Carbine to shoot well(don't use milsurp ammo), but not Ordnance Dept specs.