I set up a small drill that I tested for this purpose. A released basketball would roll downhill toward me and I would shoot as it approached. On rough gorund I felt that it might approximate the head of a bear charging toward the shooter, moving in all planes and directions. Hitting it was not easy and I was grateful that being mauled by a basketball is non-fatal. I got a lot of mileage out of one basketball (cheap at Goodwill) by not hitting it and patching it when I infrequently did. Humbling!