There is a photo of it at www.whitemuzzleloading.com and Doc is making a .54 like it. It is an experimental gun and there isn't another one like it. It was made from two model 97 Whites put together. We had some problems with the barrels separating at the weld and had to have it rewelded with a different soder because it is stainless steel. My load in Africa was 120 grains of Pyrodex RS and White's 600 grain conical bullet. I only used the gun for short range backup and putting down wounded game but it worked well. I converted it to musket cap ignition as well as I wasn't happy with #11 performance. I think a Pedersoli can match it at this powder charge level. A .58 shooting any of the 500+ grain conicals or a .50 shooting the Powerbelt 530 grain Dangerous game bullet. I've also been experimenting with 500 grain Hornady Interbonds in .458 MMp sabots in .50's and they are doing very well at the 120 to 140 grain charge levels. I just talked to a fellow and asked him how his .72 Kodiak did on a black bear hunt. He used a charge of 110 grains of FFg and took a nice 200 pounder at 50 yards. He was impressed with the gun's performance and accuracy. You have a nice gun with a lot of potential at a reasonable charge level. On the double sights. I sighted in the back sight at 70 yards for both barrels and sighted in the front sight (closest to the bore) for the left barrel at 100 yards. That way you can use the back sight for most close range hunting situation and the left barrel/forward sight for a long range shot. It works very well that way.