Some 20 years ago when common lead buckshot disappeared, I got by breaking down 12 gauge buckshot shells in "o" buck. It was often cheaper than by the 100 in a plastic box. Then I switched to Hornady "o" , but it was hardened, out of round, and as large as .323. Heck with all that !
I found a custom caster making .319, not as out of round as Hornaday, and have a great supply now. Lon