Whats that stuff called?

[SmirQ]

Whats that stuff called that you can supposedly soak your barrel in then take it out and it makes it smoother for greater distance?

[IRONMANSTH]

I think its Rain-X.

[JUMBOshrimp]

Yeah there was a post here by a guy who did it. You can polish your barrel too That helps.

JÜMBOshrimp