King - In further snooping round on this, I found a site which describes the propellant charge of those knee mortar grenades as being in a "doughnut shaped bag" in the bottom of the grenade. This would have to be no more than 2" in diameter to fit in there. Is there any way your bag could be described as "doughnut shaped" and is it 2" or under? Just kind of grasping at straws here.