Does anyone know a good way to check for reloading press alignment? I am using an RCBS Jr. Press. It appears that the decapping pin on several different dies I use is not perfectly centered in the case mouth when I raise the ram. Granted - it's not a lot but enough that it is immediately apparent. I am working up some .270 loads and have checked the bullet concentricity on a Sinclair concentricity gauge. It seems like a total crapshoot - I will get a batch at less than .002 runout and, using the same equipment, have some as much as .009 runout. I am using both Lee and RCBS dies.
Any thoughts would be appreciated.