I have a general question about ammo. My Father in law brought a 270 Weatherby Mag with him and let me borrow it last night. He gave me 2 1/2 boxes of ammo from around late 70's early 80's. Ammo looks good (no corrosion) it was kept inside from what I know.

It's a shame, because the boxes are cool and vintage looking, but the cheapest ammo I can find is $39.99 and the goes to $59.99 at the next level. That is for 20 bullets.

will it be safe to shoot the ammo he brought?

I would assume yes, but I'm not too sure about my feeling. I'd hate to have to buy $100 worth of ammo for this gun, but I want to hunt with it.
Semper Fidelis!

“There are hunters and there are victims. By your discipline, cunning, obedience and alertness, you will decide if you are a hunter or a victim.”
General James Mattis