Originally Posted by Gene
jam means how far touching the bore the bullet is seated
If this were true you could not easily 'Jam' a tangent ogive with a common 1.5deg leade angle, as these ogives contact nearest the groove(secants contact nearest the bore).
In otherwords, anyone would have to fully engrave a tangent ogive to call it jamed, and I have never heard of anyone doing this(it would take huge neck tension to engrave rifling all the way to bore point here).
Seems like I'm misunderstanding something here...
Ed, you could use a single comparator to compare them -if the ogives were the same type and radius. But SMKs won't likely match your ballistic tips.
You really have to start over with new seating tests.