whitepuzzleI've never had an issue with 15.2ms interp (no players stuttering or hitreg issues or anything) and the difference in projectile delay is noticeable.
Noticeable between 21 (or 17.9) vs 15.2ms? I kinda doubt that. Keep in mind that the delay isn't server side either, it's an artificial client delay that spawns your rocket further down the barrel to have better visual sync, since projectile spawns and destroys are not interpolated.
And just take a look at your net_graph 3. See whenever your lerp turns yellow. That means you are dropping packets.