Is that limitted to the 37mm at the fields? What is the absolute range of one of those? I assumed if you shoot it at enough up angle, the shell will dissapear before it hits the ground. What is the 'dissapear' range of a 37mm?
awhile back i did testing in the MA with .target, to see the max range each AA gun would keep punching holes in the paper. this was at sea level base:
field gun = 4725 yd
ostwind = 2767 yd
wirb = 1719 yd
now that is also a pretty horizontal shot, so I'm not sure how the range might differ the more vertical you get, but when I get 4.5k hits on bombers overhead it's pretty much just walking the end of the tracer stream onto the formation. 4.5k icon ~ 4725yds, so it seems about right.