I tip my hat to you because any deer to me between 100 and 150 is fine, but yes I agree that the the bigger calibers have a clear advantage. The question was can it do the job. You can tow a 3500 pound speed boat with a 4 or 6 cylinder, but it's clearly not the best tow vehicle. On the other hand if a guy only needs that small engine to launch the boat in the spring and pull it out in the fall and lives within short distance to the lake, then yeah it's good enough and may not be worth replacing the vehicle or getting another just for that purpose, but given the choice I agree that bigger is better. I answered the OP thinking that the someone might be looking to just get by without getting another gun for an occasional hunt where smaller deer are the norm. If he said he was hunting big mulies in Wyoming, I'd say he's way under gunned for that purpose. If he's in Florida and usually takes a small doe then I'd say he could get by.