My friends Spire seems to still have feeding consistency issues even after the nubbies were replaced by Virtue. The Rotor feeds the Clone GTi shooting PSP ramp capped at 17 BPS far more consistently compared to the Spire.
Both hoppers are using the same paint. Either something is wrong with the Spire, or it just does not feed as consistently at high rates of fire compared to a Rotor.
Rotor is using default settings, Spire had sensitivity bumped up by 1. Both hoppers have fresh batteries.