10 gauge?
I don't want to sound like a 'rainer on parades' but I have never encountered a 10 ga Derringer, especially in Cabelas.
Could what you saw have been their "Howdah" pistol? It is a side x side double barrel in .20 gauge and blackpowder. It replicates the Howdahs used for large cat hunting from Elephant back. The little rattan/wicker cage you sat in on Br'er Tembo's back was called a Howdah. There was use of one in the film "Ghost and the Darkness" about a couple of people eating kitty cats in Africa.
I don't want to sound like a 'rainer on parades' but I have never encountered a 10 ga Derringer, especially in Cabelas.
Could what you saw have been their "Howdah" pistol? It is a side x side double barrel in .20 gauge and blackpowder. It replicates the Howdahs used for large cat hunting from Elephant back. The little rattan/wicker cage you sat in on Br'er Tembo's back was called a Howdah. There was use of one in the film "Ghost and the Darkness" about a couple of people eating kitty cats in Africa.