Originally Posted by Short Cut
RYT 2Ber is right the heavier bullet will penetrate deeper and also a hardcast or jacketed bullet will penetrate further than a hollow point.
As far as what you want to carry, well there are a lot of differing opinions. imo the 10MM was if not created for then initially adopted by the FBI because of its good penetration. Shots have to make it into the boiler room to incapacitate quickly and BGs don't stand there like B-27 targets. After a 3 day force on force class I experienced time and again that shots were frequently on shoulders, arms and hands. imo a round that has the power to penetrate through limbs and oblique shots and continue into the boiler room is a better round for stopping someone who is trying to kill me.
Excellent post. Certainly one of the most rational and reasoned comments I've ever heard for having a 10mm for self defense.
To the OP, I would look at 135gr. bullets for home defense if over-penetration is a major concern. Just be aware that even a 135gr max load, like Underwood's, will penetrate a lot of drywall.