AR-15 with 55gr load at short range or a hog hunting 77gr load. Absolutely murderous hydrostatic shock truly the best rifle for small unit infantry use ever
Eugene Stoner was a mad genius. A full power rifle round would just leave a bloody .30 cal whole. 5.56 gets such speed that it causes an explosion of pressurized water in the muscle under 200 yards, the most common hit envelope.