Despite owning 7 snub nose guns at one time, I only carried my S&W 340ScPD at 11 ounces loaded with Buffalo Bore 150 gr. Hard Cast wadcutters with a minimum penetration of about 18" out of a short barrel. No worries about expansion or penetration. I have long been a believer in wadcutters for self defense. I rather have the penetration than the fraction of an inch expansion that so many ooh and aah about.