Redding Instant Indicater ?

[leatherman]

Ok bought a Redding Instant Indicater in the hope I would get more consistent Ogive measurements but not so. Seems to be reading 1 to 3 thousands different either way, once zeroed, if you rotate the shell in the shell holder and run the shell back up. Yes I have it set up right have even measured Ogive readings with the spring in and the spring out, still getting 1 to 3 thousands differents in reading depending on how the shell is removed and place back into the shell holder. Heck my standard Sinclair comparator will do that. But 1 to 3 thousands different in seating depth is messing with my load development. Any one experience this? If how did you fix it.

The bullet in question is the 178 grin AMX

Thanks
Leatherman