I was issued a S&W Model 10 with a 4" bull barrel. It was a 1986 vintage and we were issued 158 gr., LSWC in 38 spl.+P. My Model 10 was rated for +P ammo. The issued rounds bounced of tires, but went through fenders and car doors. It would go through a windshield if it was sort of straight on, It would deflect if it hit on an angle. I liked my Model 10 and felt comfortable with the 158 +P service round. While it wasn't the end all round it did it's job. I think a .357 Magnum out of a 28 would have been better, but that wasn't an option.