Fallout 4 floods you with ammo. Only in the very, very early going do you have even a tiny bit of a problem with ammo, and then not really, or if you end up with a really powerful gun before your enemies are high enough level to drop that ammo type. 10mm ammo is everywhere, though.
I never had a problem. If you're doing that badly then you must be, uh ... missing a lot. Try and hit your target. That will help you save a lot of bullets.
If nothing else, it's so easy to make caps in Fallout that you can just buy ammo.
Oh, come to think of it, here is a little Fallout tip: use a pipe gun to kill the small stuff. Don't waste your good ammo on rats and bugs.








