So I indicate the rear of the cylinder in to dead on with a .0005 coaxial indicator.

Then I go for a chamber.

The chambers aren't quite straight, from the rear to about midway they're off by .001x .002y. I didn't get a chance to put a feeler on long enough to reach the forward end of the forcing cone yet.

BUT, my question...

Should I be indicating from the rear of the chamber, Or center it up on the forcing barrel end of the cylinder??

OR, am I putting way too much thought into this!?!?!