Could you send me a pm with your email address and I can send you a newer version of the base map which shows P-141.
Bldg P-141 is across the street from S-105 (firehall)
Come onto base and take the first right onto Somme road and the firehall is on your right.
Take the next left across the street from the firehall and P-141 is right there.
I suggest just showing your ID at the gate and tell them you are going to the firehall.
We couldn't get the range booked as a military unit has it so there will be no range practice...so no ammunition will be necessary .
Morgan