Wow. You must have used an evil assault bullet and had all of the victims in a perfect line. :-)
I have a surplus 6.5x55 Swedish Mauser army rifle that will put a 140 grain FMJ bullet through 2- 12" maple tree trunks and still keep going off into the wild blue yonder. I don't know how many bad guy bodies that equals, but if I am ever attacked by a gang of them all lined up in a nice straight row I could find out.
BTW, before I get any well intentioned warnings about firing stray bullets into the wild blue yonder, I fired at the trees approximately 100 yards away from a position that assured the bullet would impact the other side of the deep hollow behind my house. I live way out in the mountains and have a home-made shooting range in my back yard with a backstop made of oak logs and dirt. Weather permitting, I can shoot for fun and practice any time I feel like it, and I reload about 95% of the ammo I shoot.