archery equipment

Can you hunt at any time with a compressed air "arrow gun," that fires a 20" arrow with broad head?

I just got into pellet guns, now that I have retired (I'm 63), and the next air rifle that I am considering buying is a PCP (pre-charged pneumatic) air rifle. It is a convertible device that lets you pick the kind of barrel you want to attach: .22 or .25 caliber for pellets or one for shooting 20-inch arrows. You can dial the pressure up or down to fit the shooting environment or game that your are after. The pellets fly at about 800 to 900 feet per second, and the arrows fly from 260 to 290 feet per second, with precise accuracy.