I went the Pedersoli site. It doesn't look good for not being barrel heavy. The .54 weighs 1/2lb more than the .45. That leads me to believe the .54 has a thicker barrel, and even though it has a bigger bore it's heavier. The problem is the stock is very light and doesn't balance the barrel. Plus, a 39" barrel has a lot of leverage against the short butt stock.

You might love the gun. It was my first time going from a Hawken to a long rifle. I didn't like it much. It seems like a horrible design and has no balance.