I am very well acquainted with an individual, who in his youth was less law abiding. 22's worked well for poaching, especially with head shots. But if one misses a crippled deer can result which will die a slow death as they cannot eat. To avoid this some took them looking away from them to get the back of the head That works for heavy birdshot as well, so I have heard.
I am in the process of getting the parts together for a future build. Was considering a 32 but am leaning to a 40. I can use a 5/16 ramrod (already have the thimbles from stuff I bought back when) and have molds and other stuff. When I looked at swag ed balls, which are very economical for small bores, TOW lists 395 Hornady at $9.15/100 and 315 at $8.15. Not a real major difference. Also a 40 shoots well with 35-45 grains of powder and a 32 with 25 to 35. Priming is the same. We are looking at slightly over a dollar difference for 100 shots, and less if you cast. 32's are fun and lots of folks like them for good reason, but after shooting my current 40 this fall, I am starting to appreciate the little caliber. 40 grains is not that hard to shoot, I can legally hunt deer with it and it really does not do any more damage to small game than an accurate load in a 32. About the only drawback is that a 40 will carry farther. There are better deer rifles, but one can if bored during deer season with about a 45-50 grain load in a 40 and hunt both small game and deer. For me if I do both then I can see neither as I went squirrel hunting yesterday and saw 2 deer and no squirrels. During deer season I saw lots of squirrels and no deer.
DP