shotgun and automatic. since you can mod the shot guns ammo for long range slug and auto for close to medium range and any more and you should just run or crawl away
Yeah but remember that there are a lot more ammo in this game than there was in fallout 3.
Chances are you're not going to end up with a crapload of ammo.
Maybe you have 20 rounds of .308 ammo and you run into 5 raiders.
You pick them off, takes you 12 rounds.
But you didn't get any .308 from them.
You didn't get any ammo from them which you can use in the weapons you brought.
And there's no guarantee that when you roll back into town you're going to get more .308 from the local weapon store.
He might not have any in.
So with guns you have to bring several with ammo for them just so you can survive.
You bring one or two weapons with you and you're probably going to run out of ammo for them very soon.
And then you'll have to go back and forth to town like crazy in order to buy more rounds for your weapons.
But this is just speculation.
Who knows.
Maybe we'll get showered with ammo again. (which is a bad thing)