Black bear hunting opinions

[Livewire322]

I'm going to be using 180gr 30-06 rounds, but i'm wondering if i could use 165gr if im 300 meters or less away...

I’d bet money that a bear won’t notice the 15gr difference, supposing you put the bullet where it needs to go.
They’re not bulletproof by any measure - I’ve taken one with a .243, and there are a few guys on here who claim to use .223.