Too bad Mike. Is there any way I can change my photos to eliminate the infamous "red X" problem? I think is has something to do with codecs that I know nothing about.

The way I measured the chambers was to look down the illuminated barrel and put the corner of a piece of metal at the point where it looked and felt like the cones began. I know this is very crude. The cones look quite dark compared to the chambers and bore...a sign of lengthening?