I picked up a J.K. Cloward built Martini in 218 Bee Improved yesterday. Printed on the barrel "J.K. Cloward 218 Bee Improved" Any ideas what Improved might be? The gentleman I got it from was only able to locate one piece of fired brass and it is significantly different than a Mashburn in the shoulder area. I hope to load some standard 218 in the morning and depending on the weather fireform a couple pieces of brass just to confirm that it is correct. Google mostly tells me that 218 Improved is a Mashburn and there is very little info on any of the other 218 wildcats either on the net or in the books I have. Any help would be appreciated, Thanks.