Good morning Trevor
You are right that ours are usually 12 ft lb but thereare some on FAC I imagine.
I did purchase one where the blow off valve had been messed with and when I got it home I had to take it apart double quick as it chronod at 18 ft lb...
All mine run at 11.5 to 11.6 but are still effective hunting guns.
I would like one at 18ft lb but so much pumping...
You are right it's a knack! I enjoy it too