In a Lefever catlog the statement was made that any choke combination could be ordered at no extra cost, but unless otherwise ordered their guns would be shipped full in both bbls. I highly suspect at this point in time as the bbls were being made most were bored full. When orders came in for lesser chokes, with the taper choke style used it was a simple matter to simply run a reamer back in to a greater depth. I seriously doubt they anticipated very many of them being altered after they left.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra