.30 Cal.
Uragan, Vulcan 3 long, Evanix, Daystate Renegade, Vulcan 2 Tactical, or another one comfortable for you, but accurate with as much shots per fill as possible.
You will be in excess for doves, but adequate for medium size like coyote and javalina.
Another alternative would be a Wolverine HP or a Vulcan 3 long both in .25 Cal shooting the JSB 34 grains at almost 57 foot pounds energy.