Free: Contests & Raffles.
I don't think it matters the shape and size of the little brass case that holds the powder that burns. As long as it sends out that little piece of lead and hits the target, that's all that matters. To me, this question is a fun one but one where we don't learn a lot. I worry less about the size and shape of the powder holder and more about the object that actually makes contact with the animal. Bullet design is 95% of it, in my opinion.