Currently working in cone 6 oxidation porcelain, pinch pottery and slab dinnerware...also combining clay with fabricated sterling and sterling and gemstone jewelry. When out of the studios I love to hike and kayak.
I agree that you should fire slowly, until the water is all out of the pots....keep slow and keep the lid and some peeps open through about 725 F and use that pyrometer with a firing temp chart handy, it really lets you know where you are in the firing if you are firing manually.
It only costs pennies for you to extend your firing time a bit, so that you avoid those unhappy "explosions". Better luck with your next firing amd enjoy a cocktail! Melinda