Hmmmm, whose ammo is that? I know that Fiochhi makes 7.63 mm Mauser pistol ammo and although externally identical, Sellier anad Bellot make the 7.62 x 25 mm Tokarev round. Ballistically both cartridges are identical: the Mauser round takes a 88 gn bullet at about 1,390'/sec and the Tokarev a 85 gn bullet at 1,400'/sec. The cautionary note here involves mil-surp submachine gun ammo with may be loaded to higher pressures than those old beauties can handle. As well, Ron Reed of Reed's Custom Ammo, also a Graybeard member and sponsor I believe who is listed in the sponsor list, makes correct ammunition for the older Broomhandles. Sounds like a lot of fun. You have a hard time finding one of those around here.