I am not sure what your jump is. You may be right.
Jump is measured at the bullet-diameter on the ogive. I measure it with my Hornady tool (comparator) so that whatever bullet I am using I know what the jump is.
You found the chamber length with the Hornady (formerly Sinclair) tool, but you probably didn't use THAT number in your notes.
The COAL number varies more than the comparator number because the bullet tips vary more.
The VLDs usually, not always, by any means, are more accurate with a minimum of jump, when the other bullets use quite a bit, as illustrated above.
The ABLRs might be tested at .050" or so, with some tests a bit longer.
Have fun,
Gene
