I copied this from the Naked Whiz where they tested Kingsford briquettes.
"Maximum Temperature
The Test: We started a chimney of briquettes and once they were burning away, dumped them into a medium size Big Green Egg Cooker. We then added more briquettes to bring the level of the briquettes up to the top of the firebox. Finally we recorded the maximum temperature at the grid level, the opening level (also known as the raised grid level), at the level of the dome thermometer, and finally down in the fire itself. Temperatures were measured using a 2000° K-type probe thermocouple and a 2500° K-type ceramic thermocouple. We allowed each brand to burn with the air vents wide open for a sufficient time to get all the briquettes burning and until the temperatures measured no longer continued to rise.
The Results: The Competition briquettes do indeed burn hotter than the Sure Fire briquettes. Here are the results:
Grid Level Opening Level Dome Level In The Fire
Competition 1341° 1040° 1161° 2033°
Sure Fire 1140° 979° 1075° 2058°
Wicked Good Charcoal 1184° 1024° 1051° 2020° "
So, if that's the temp inside the cooker the metal outside is still very hot. I hope this comes through formatted correctly.
EDIT. No it didn't, I hope you can sort it out.