You are talking about this that the modified case screws on.
Lock‑N‑Load® O.A.L. Gauges & Modified Cases - Hornady Manufacturing, Inc
Lock-N-Load® O.A.L. Gauges Regulating seating depth and the resulting jump to the rifling is widely regarded as fundamental to improved accuracy. A few thousandths of an inch change between the bullet and the rifling can make the difference betw...www.hornady.com
There is another method to find it with a cleaning rod if you keep breaking the Lock-N-Load® O.A.L. Gauge aluminum tube.
Read this from Ultimate reloader. I can also give you the other tool name when I get back home next week
Three Ways to Find the Lands! – Ultimate Reloader
ultimatereloader.com
That is precisely what Hornady calls it and probably why @asd9055 is trying to get clarification.That's not OAL
@asd9055 is correct. Have you checked with Hornady if they might (?) consider a replacement? The worst they'll say is no.This is the part that breaks
Well I guess I could expect so little from Hornady.That is precisely what Hornady calls it.
Well, I don't care for Hornady much either, but that tool actually can measure both CBTO if you use the bushing, and max OAL if you don't use the bushing and measure to the tip.Well I guess I could expect so little from Hornady.
"Jump to the rifling" is not OAL.
I advise the OP to abandon Hornady, and that method, all together.
Instead, seek a cleaning rod method for touch length.
Contact Hornady.I've now broke TWO of the Hornady OAL gauges. Both times the threaded aluminum tip snapped off. They seem very brittle. Does anyone make a similar measuring device that's more durable?