Dave, we have a legal spot west of Lake Pleasant.
We also shot Ruger Scout, 22 Gatling gun, Marlin 45-70, Super Redhawk 454 Casul, AR30, AR10 & AR15, Mossberg 590A1, Glock 40, S&W 9, Blew up an 8 ounce Tannerite. Fun meter pegged.
Larry, we use a Coors Light can filled with cement, about 2 lbs. Or a billiard ball but you can't see it as well and it shoots too far.
The cannon is a Lyle Gun:
Lyle gun - Wikipedia, the free encyclopedia
AZ Bob