Newb question... What are the pros and cons regarding Lighter bullet w/more velocity vs heavier with a bit less velocity. I would imagine in a home defense situation, over penetration would be a concern...( I'm trying to be serious���� Lol) I suppose I'm asking about the purpose and reasons for each. I did attempt a search,but probably didn't use the correct term. I did SP duty when on shore in the USN decades ago,just shot what they gave us.. But recently got back into shooting and I want to learn it all.. Any suggested 'newbie ' reading? Thanks!! Edited .... I found this site http://www.ballistics101.com/personal_defense.php More suggestions welcome.