Reason I mentioned 5-10 minutes is because I use the Dillon spray lube. Not sure what the Hornady lable says. Guess I should have made that part clear, sorry.
Now I have left my cases for over an hour one time. Then sized them. No problems at all.
I did use the RCBS lube and pad in the beginning. Messy and got tired of it. I use Imperial for my 6BR when loading at the range. Does a good job. And cleans up easily. But for volume loading it is a PITA for me to wipe each case prior to sizing. But hey that's just me.
I have used the one shot for about a year with 100's of rounds in my 30-06 with no problem. Thats why this got me a little concerned. Could a hot load make your cases to big for the die and cause problems? I am running 1 grain below max in the book but if I go ant higher it shows pressure signs.