I've been loading up some 12 gauge loads with #F (.22) and #1(.30) buck in the same shotcup over a charge of Unique.
Today I did some patterning against some cardboard sillouettes and I was pretty amazed with how tight the patterns were out of an open choke. The loads were 2x7 #F and 2x3 #1 for a total of 20 pellets. At a paced off distance of 30', 18 fell on the "head" of the target.
I was mostly trying to put together a woodchuck load for my step dad but I have no data for how well .22 lead balls work at around 1000fps. I mean, I wouldn't want to get hit with one (or 14 of them!), but I'm wondering if anyone uses smaller sized buck shot for mid sized animals (coyotes, things like that).