Takes more than just a barrel to make any rifle capable of one MOA. Trigger, sights, ammo, bedding and the shooter's skill all affect accuracy.
A 24" target at 200 is huge. As I recall, the DRCA bull is that big on 600 plus yard targets.
1" at 100 isn't sub MOA. It is one MOA. And the scope had nothing to do with it. A scope, cheap or not, will not make a rifle that doesn't shoot well anyway, do so.