Wont get mine without some SERIOUS folding money...........Ballard but the only CBs "slicked up" at the factory were the CBC models, IIRC. Mine is as accurate as MSharley has shown. Also, mine is a Marlin ReBarreled 1971 model (no CBS) Once you get the right diameter boolit, it all falls into place..................at least for me it did.
I'm in the "Grand wouldn't get mine" group. I keep my boxes, many do not. Some of mine do not have a box as the original owner didn't keep it. I don't shoot the box, so not an issue for me. If you can afford one, you won't be disappointed with it. DP