It maybe just me but isn't consistentcy part of your accuracy? You can get the most accurate projectile in the world but if you have inconsistent power/speed that would be classed as in accurate as that projectile wouldn't land in the same place every time. So I think yes consistency does play a part in accuracy but it may just be a small part. At end of the day your pushing a squashy ball filled with liquid, it's bound to be unstable as the shell will change shape along with the paint moving about inside.