On the previous forum I ran a post on the MM-407 listed as a musketoon bullet with a thin rim. The T&T handbook does not have a cross reference listed for the bullet nor could I find it in RBTRF Volume 1, 2, or 4. MM list the bullet as a US used bullet. I have two of these with the providence of one being dug in Louisiana. The other I do not have a solid providence but the bullet folks I have talked with believe the bullet is mainly found in Louisiana. This bullet has always interested me with the deep cavity and the thin rim. I would appreciate information from diggers and collectors on origin and dig locations of this bullet. I am looking for any and all available information. I do know this bullet does not come up for sale very often. I welcome any and all inputs.