Unknown .45 bottleneck


#1

The cartridge pictured here has been referred to as the .45 Ernest in several of the Buttweiler auction catalogs (see Vol X, No 3, lot 335), and as the .45-1.452" by George Hoyem in his Vol 4 of The History & Development of Small Arms Ammunition. It has also been referred to in the past as possibly being a .56-46 Spencer center fire. The case is the Berdan primed, folded head style of UMC. Does anyone know if there has been a positive identification of this cartridge? The dimensions are as follows:

bullet - .458"
neck - .487"
head - .562"
Rim - .676"
case length - 1.441"