In pve I feel like I have to only hit crits so I don't run out of ammo.
I'm talking about all the ammo you hold, not how many you can shoot before reloading.
-
I don't usually have a problem with it. The ammo drops from enemies are pretty generous, plus I like to play close quarters so even if I don't get a critical shot I can usually follow it up with a melee so I don't waste more ammo than I need. Also, the gunsmith sells ammo packs for around 250 glimmer, I think, so I stocked up on those and haven't run out of ammo since.