I wear a medium Damascus and a large Full Shot. The Damascus fits my fingers well, but it's a little short in the wrist. I called American Leathers about sizing for their glove, John suggested I send him a tracing of my hand. I'm kind of in-between a medium and a large; I was sent both sizes to try and found the medium too tight, the large very snug - and just right, size wise.
I believe my Full Shot is buckskin, haven't shot the elk or buffalo. Either will be a big change coming from the Damascus; I think elk
is a little thinner and might offer more feel.
American Leathers' customer service is excellent, you might find it worthwhile to talk with John - you'll know for sure about the fit and the leather.