wot does HPTA stand for again?

[Kelso]

thread title. no info in search found

 

[blaster220]

hypothalamic pituitary testicular axis

 

[speedy7]

I think it is also for high pressure air as well, but that doesn't mean anything for bb.

 

[Lift Chief]

How could you find NO info about this doing a search? Either way blaster is right.