1/6th got me to the Peanut Restriction and back up the line another 300' before hitting my 'turn' pressure.
Shallow cave, uber low flow, its quite possible to get some good penetration by Intro standards. Just don't forget to enjoy everything!
Well , you ARE using LP 250's aren't you?
(waits for it)
JUST KIDDING !!!!
You don't breathe anyway , fer sure.
Da Beano