Hunting penny rolls today and this dime that weighs 2.31 grams popped in!
2.27 grams is nominal for clad dimes. 2.31 grams would not be unusual. Experience tells me that up to 10% over or under is not uncommon.
So what you have is a dime that has been beat up a bit.
Time for more coffee.
Small dots on back at the o and e in one