Piper , It was never my intention to have a two sentence comment run on for days.
I see now that I should have made it clear that I was speaking in general terms ,but in my attempts to be both brief and witty I have failed .Without going in to long explanations of what I saw wrong with James'es original post,having had experience of a similar device and knowing its shortcomings ,not wishing to cause any offence to his ideas ,I made my original post that you have subsequently quoted.I still maintain that a plug gauge is the best method of measuring a chamber depth. Yes there are inherent problems and yes if you want to be 100% accurate you would need to measure the chamber diameter at the bottom and turn up a plug of the corresponding size taking into account that you can not put a .810" plug in a.810" hole,etc. etc.
In future posts I will try explain my reasoning in greater detail,so that my comments may hopefully be taken as helpful,rather than dismissive or dictatorial.
