I'd just go with the cheapest field loads of bird shot for practice. For tight patters at distance I've had good luck with the Fed low recoil flightcontrol 8 pellet load of 00 out of a cyl bore. The tree/brush line at the back of my house is 58yds and they still have a viable patter at that distance for coyotes. I keep Fiochii (?) 0 low recoil buck loads in my house gun to have some dispersion for inside.