Well, this was a quick experiment (at least for me). With a little time on my hands tonight, I reloaded one round w/ a 230 FMJ bullet without powder and with an expended primer. I am pretty sure the cases are the new "polymer coated". I cleaned the case by hand, did not tumble it. It ran through all dies with no trouble, real slick and smooth just like brass. However, when I chambered the dummy round, the bullet was depressed 3/100 further. (I only lubed the outside of the case slightly, not the inside.)

One COULD say I need heavier taper crimp, and maybe the case is thinner. However, my crimp die is fine for all my brass cases of varied makers and thicknesses, and I do not experience that problem with my diverse range brass. I suspect it could be that the steel case just will not retain or "grasp" the bullet enough for a reload. In any event, I'm done, to me not worth the risk of elevated pressures.