Originally Posted by jmason
They don't come with it because people get custom necks made in their guns. So that means you can get different sizes. If you do a search you'll find them. I know midway has them. I can't tell you what size you need but I'll but bet someone who knows will chime in.
I don't consider myself an expert but I normally want a .004 to .006 smaller neck Inside dia.
fit on the bullet (Tension) .so take the bullet dia. add the wall thickness of the case x 2 and
then reduce this buy the amount of tension you want and that is the size of the bushing
Example; .284 bullet dia. +.014 +014 wall thickness = .312 Minus .006 for bullet tension= .306
ID for bushing. There is a chart that will tell you which bushing will get you this diameter.
I would buy several different size bushings because of spring back of the neck is different
depending on how many firings and/or what brand the brass is. (.004, .006, and .008 ).
I hope this helped
J E CUSTOM