The only deer I have seen taken with a 300 mag was a blacktail. Bullet goes in .308 comes out fist sized hole.
I would use 150 or 165 gr bullets but if 180 is what you have it set up for, it will work. Aim to miss the shoulder bones. A hit in the ribs takes the wind out of their sails and waists very little meat.
A hit in the shoulder will send bone fragments everywhere. And a large portion of the off side shoulder will be worthless.
You can't fix stupid....however ignorance can be cured through education!