Hi Bigbull I have a super 91 collectors edition in .504, it is my favorite rifle. It has a laminated stock and a "black ice" coated barrel. It is a very accurate rifle, built to shoot large conicals in the 400 to 600 grain range with up to 140 grains of pyrodex P powder. It is a strong rifle.
I believe that although the websites are still up the company is done. The rifles were originally built by Doc White.
If you decide to buy it I have owners manual etc that could be copied if needed. Dennis