If your bore dimensions are correct, the only bullet that would fit reasonably well would be the Hornady 7,35mm Carcano projectile. They run 0.300" dia.
I'll try and check mine soon. But it's bore is terrible. Haven't been able to get the carbine- yet!
The swivel nut wrench combo tool is commonly seen on gunbroker, I think. Apparently there's a blue million of them.
Thanks for the update!
I need to get back to these rifles. Been off on other rifle projects the past few months.