I'll agree here. I've decapped quite a few by just doing it very gently, and the idea to wrap a towel around the press isn't a bad thought, either. I'd say forget about filling the cases with water, though. I've followed the age old advice to apply a little penetrating oil and let them sit a while to deactivate the compound, and I'm here to tell you, modern primers are pretty damned hard to kill! Always gotten a bit of a laugh about the notion that handling primers with your fingers may impart enough oil to kill the compound, since I've found several that were still perfectly "live" after a penetrating oil soaking. Being that I've never (and wouldn't advise, anyway) reused the primers that were knocked out, the thought of just popping them is perfectly good, too. If nothing else, it gives one an appreciation of the power that's contained in that little cup, and you'll treat them a lot more respectfully afterwards, I guarantee.
Kevin Thomas
Lapua USA