Larry, yes the SKB action is scalloped different but I would call J.B.`s action as having one large scallop and the BSS not straight like the older Miroku. I don`t know what else to call it maybe angled or cut out.

I don`t know if a double trigger conversion can be done to a BSS but I did see a BSS style action with double triggers even the same BSS engraving but was only marked Miroku.

Seems there are alot of variations we don`t see much of.