Well, I cant say for sure, because along with not being a big fan of Hawken rifles, I’m not a big fan of .54 calibers either. however, I was a witness to a big argument between a friend of mine, and Bill Large, over the proper caliber for long range shooting. My friend wanted Bill to build him a .54 cal. and Bill said a .58 was inherently more accurate at long range than a .54. My friend told Bill to build it in .54, and Bill told him to find another barrel maker.
Hungry Horse