Consistent shooter

[Ether]

Is there a consensus forming concerning what type of shooter design provides the most consistent shot from beyond 15 feet?

I'm thinking near the top of the list would be a) metal-spring-loaded catapult or pusher whose springs are stressed well below their yield strength and b) pneumatic firing catapults and pushers,

and near the bottom of the list would be a) motor-powered kickers and b) motor-powered wheel shooters.