How do I get my companions to switch up their guns/etc?

I've only had boone/cass/ed-e

Boone handles everything just fine with his default gun, and he DOES use the unique cleaver I gave him, but hasn't used a different gun even though I've put a few in his inventory.

Cass's gun svcks against anything armored, she even says so in combat. So I tried giving her That Gun, or a better shotgun, or a rifle, or anything. She won't equip it.

Is it just not part of the system? Because I swear that I read that they would accept better weapons.

Do I have to give them the proper ammo as well? Companion default weapons seem to ignore Ammo.

Thanks!

yea you have to give them ammo, even if you give boone a new weapon that uses the same ammo as his default weapon he still needs ammo for it, even tho his default weapon has infinite ammo

Yeah their default guns don't use any ammo but if you give them better weapons then they need ammo for them. When they run out of ammo they will switch back to their default weapons.

thanks guys.

ive given veronica better guns (rifles, smg, etc) she wont switch from her default pistol
but if i give her better melee weapons she switches for them