FWIW; have "de-crimped" about 900 HXP cases for my Garand (30-06 Greek surplus military ammo). Each one had 3 small stakes around the primer pocket. I normally use clean and not necessarily super sharp countersinks (often a carbide tool) and I've done them all just like NATO/LC brass and no problems/grabbing...
For me, removing primer crimps isn't part of a reloading session. Mainly it's "busy work". Since I have waaaay more time to reload than to shoot, I'll do some things around my shop to keep me busy "reloading", like processing brass; tumbling and sorting brass and removing primer crimps, so I have never been in a hurry and counting seconds or rounds per hour. I pick up a case, touch it to a countersink/chamfer tool and drop it in a container; 1 second?