Hi I'm curious do companions need ammo, it seems like raul shoots his 45 forever and never runs out of ammo. If i give him a better pistol does he need ammo for it?

No.

You only need to give them a weapon; they have infinite ammunition.

oh that is cool thanks. Do you know any companions that use energy weapons, I'd like to give my gattling laser away. Better yet do you know of a list that shows all the companions and shows what guns they can use.

I've had Boone run out of .308. A quick purchase and he was back in the game. On hardcoe though, I dunno.

As far as I know: companions have unlimited ammo only for weapon they have when you recruit them. If you give them weapon which use different ammo, you have to supply ammo as well.

Nope Boone ran out and even said so. Was [censored]ing about melee so I gave the flamer ... he kinda liked it but did not use it much. We were .... negotiating mostly then.

I got him some .308 and he was back killing everything again. As I said this on hardcoe.