Its powerful. Enough. Good for everything except the largest game. If you don't need lots of power, get it in a pistol caliber.
Its accurate. Enough. Good to 300 yards (don't let anyone fool you on this). Need more range? Get a battle rifle. Where are the majority of shots taken? Yeah. Pistol calibers still apply.
The cyclic rate approaches a semi-auto rifle. If you're good. And smooth.
It's friendly. Thanks to years of westerns, it will be the last weapon ever banned. Probably.
It was good enough for thousands of settlers in the west - it subdued an entire continent.