I'm sorry, but this comment is daft as if gets.
Less explaining to do after shooting someone with ball ammo vs HP? You're joking, right? You're screwed either way, bud.
And ball ammunition is likely to over penetrate and poses a risk to family and neighbors. Sure, ball will put a hurt on someone, but if the object is to stop a threat, why wouldn't you want the absolute best in a life and death situation?
Thanks for answering a question I didn't ask, though.
The myth of stopping power comes from U.S. gun rags and faulty tests done long before any of us were gleams.
And the fact remains that if you ever use a firearm for self-defence, you will be arrested, lose your firearms and licences.