Those who don't have suitable birdshot. In the excerpted text, they used buckshot and pellets three times each, IIRC.
Ain't no buckshot in that Xray. Birdshot, number 6 or so. Buckshot is almost .36 caliber and would never enter the appendiceal orifice. And if you hunt birds with buckshot you are going to be very, very hungry. Only nine pellets of 00 buck in a 12 ga. shell. And if you can chew, however few teeth you have, a piece of bird meat with a .36" chunk of lead inside without noticing, you must be drunk.