EVERY "normal" case acts this way, exceptions are the Super Short Mags which have a whole nuther set of (related) problems.
In My Opinion there are many cases (and the entire Lapua line) which will run up to around 50,000psi without yielding. My SWAG is based only on observation and velocity over a chronograph, and interpolation. The starting loads in most reloading manuals will not stretch Lapua or Winchester brass.
Historically hundreds of thousands of Palma Competition loads would "teeter on the table" so that you could measure the headspace.
YES a 30-30 will stick and grip the chamberwalls, as will even a tapered antique like the 22-250. The tapered cases will also tend to stick the boly on primary extraction but this is another issue. And there are some cases like the ubiquitous 30-06 which have such a shallow shoulder angle and short shoulder that the headspace can be reset by the firing pin! Given new and fragile brass and a loose fit, and one of the "upgrade" springs and pins. Again, documented tested fact. Research machine gun design to see where he 30-06 round cannot be adapted to many systems because the act of chambering a round drives the case in hard enough to reset the headspace.
To all's of you who want to apply book figgers and guesses to the thang ....... just reset the shoulder on some new cases, MAKE about .005 or so MEASURED headspace and do a load workup. WATCH the primer pop up........This tends to add perspective.
Note that there is NO RE-SEATING MECHANISM for the primer, the cartridge does grip the chamber walls, it NEVER slides back.
I'm eager to hear of some testing.