I'm havin' the same trouble with gettin' a Rapine mold. The Armi Sport has an aparently bigger bore that the Perosoli and IAB which DGW sells.
I got a measurement of .545" x .528" on my Carbine. Still lookin' and figurin'.
The flat base pointed boolit is what I hav found to be hisorically correct...but what I want it a heavy boolit that groups well and shoots far. The Armi Sport Cav Carbine has a 1 in 22" twist made gfor a heavy boolit like 4435gr to 550gr.
Awaiting activation to post in Shilo Sharps forum and find out what will do the job.
Here a Rapine Chart and the Rapine phone number:
215.679.5443
http://www.ch4d.com/catalog/?p=88
SG