I recently purchased the bullet shown in the photos from a well known and respected relic dealer. He offered it as a "52 caliber Hanovarian". I can find no reference to a .52 Hanovarian in any of my reference books including the RBRF series. In Tom Stelma's "Some Civil War Bullets 2", he references and I quote "Morse bullets have been found in .52, .54, and .58, as well as the .50 caliber bullet."
The bullet measures .904 x .550, with a solid base and no apparent base casting sprue. One of the photos shows it between .44 and .65 Hanovarians. If it was fired, it only has the lightest of signs of rifling, and I tend to believe it is not fired but dropped.
Any ideas what this bullet is? I tend to wonder if it is indeed a .52 or .54 Morse