Strange bullet mold

[LafayetteCountyDigger]

Hello everyone, I recently picked up this bullet mold and I was wondering if y'all have ever seen one like it ? I have looked all over and I cannot find a match to it. The bullet it makes is 41 caliber. It resembles a volcanic but I don't see how that would work as those are self contained and there's no way to get the priming cap in it . Maybe it used to have a different sprue that allowed for a priming cap to be placed and someone just added on a new one. I tried to search for an example of a volcanic mold but I couldn't find one