![Image](http://i687.photobucket.com/albums/vv240/guncrank1/9B411A80-C621-44DE-831B-FDB502B129CB-11209-00000C3F64497051_zps221e3efd.jpg)
Chamber being indicated back side of headstock
![Image](http://i687.photobucket.com/albums/vv240/guncrank1/124B4A01-C0CC-4E70-9A4F-00EF3F8FA5B3-11209-00000C3F5DD69678_zpsd9ae7877.jpg)
Spider mounted in four jaw chuck and muzzle being indicated with a gauge pin
Nothingrichief wrote:What do you do, to hold center on the chamber end? do you turn a plug and 4 setscrews, like another spider?