This is an old post, but in case someone comes across it later and wanted an answer.
Short answer: it does nothing for performance. I have two oneidas with bottles. I put a shoot-through rod on my Osprey to see if it did anything (like feeding line smoother, shooting straighter, etc). They shoot the exact same. It looks cool I guess, but it does nothing.
Short answer: it does nothing for performance. I have two oneidas with bottles. I put a shoot-through rod on my Osprey to see if it did anything (like feeding line smoother, shooting straighter, etc). They shoot the exact same. It looks cool I guess, but it does nothing.