I have an old Jakar .45 cal. belt pistol, with a three digit serial number, that I was given years ago. I have used it as my test mule for everything from nose cap casting, to wood finishes, barrel crowning, and even sight development. It has pretty good rifling, but it a rifle twist. It shoots so well that more than one person has asked to buy it. I quit loaning it to my shooting buddy, because he kept outshooting me with it.
Hungry Horse