Nope the Ogive will be different on different bullet shapes, so you need a dimension to ogive for each different bullet.
It's not easy for me (of limited experience) to explain, but I shall try.........
The calibre specific insert is not calibre size, it is smaller and does not measure the true ogive, but a smaller than bore portion of the bullet.
That specific dimension it measures will then move in relation to to the true ogive dependant on the taper of the bullet.
Here are a list of the actual inserts for a few different calibres, these are Hornady (stony point) inserts measured using a vernier.
Calibre Actual
.240" .232"
.220" .213"
.30" .297"
So from that you can see the only one that would be anything like close to true reading would be the .30 cal one.
To put it in engineering terms, it is not a device for measuring anything, it is only a comparator, it accurately compares two identical items, and that is all.
Neil.