OK, I am confused. I have been reading through the threads and thought I understood the deal with rimfires not being able to be used on SB2 frames because of the firing pin not being offset. And the Versa Pak barrel bore being offset so that the centerfire firing pin would hit it on the rim. For this 218 Bee, what was used?
After writing the above and thinking about it, I think I figured it out. The .22mag barrel from a sportster has the bore centered and if put on a SB2 frame the firing pin would hit the center of the rimfire cartridge, which is where the new primer for the 218 Bee is now located. I got it, duh, just takes a bit for it to soak in.