Well, the "cheap" American eagle is about $2.50 per round and has 660 grains, whereas my Hornady has 750 grains, and is closer to $6.00 a round lol. It's expensive but it is worth it in my opinion. Just the percussion of the blast and wind pushing your clothes against your body is amazing.
I don't doubt it - I'd probably want to double up on hearing protection just to be on the same range with you.
Mountain bikes are for slow people, and reptiles are far better pets than cats & dogs!