The fact that the M16 is a push feed and the marines use remington 700's for sniper rifles has very little to nothing to do with their utility as hunting rifle. Snipers rarely get charged by wounded buffalo, and virtually no one hunts with a M16. M16's are designed for a high cyclic rate of fire and tend to jam quite easily. That's acceptable in a combat situation because there's always another guy within 20 feet of you whose M16 is probably working, covering your butt while you can clear the jam. The M16's ability to lay down fire quickly outweighs it's potential reliability problems in a combat situation where there are multiple combatants. The situation would be entirely different if the soldier toting that M16 was fighting alone.