For what it's worth, that Kimber 11/8 figure rings a bell. I don't know what the basis is for their model numbers is but I have a theory based on this proven, scientific statement:
If you put two wires of the same gauge in parallel, it effectively drops 3 in the gauge system.
That may be clumsily worded, but what it boils down to is this: Two 11 gauge wires in parallel equals one 8 gauge wire.