1974 Roosevelt Dime Weight

Okay, I'm finally going to reach out and ask. I feel like I'm missing something obvious here. I realize that a Roosevelt dime's weight from 1965 to present is 2.268g and has a tolerance of +/- 0.091. So this brings the low weight threshold to 2.177g and the high weight threshold to 2.359g (for Cu 75% Ni 25%)
So this particular dime weighs in at 2.376g.





A silver dime would weigh in at something in the neighborhood of 2.5g right? You usually can tell that it's not silver anyway just by looking at it.



So.... I was thinking maybe wrong pallet? --but wait! Looking at all the combinations of coins in a published 'Coin Weight, Composition & Tolerances' chart for most of the denominations of US minted coins, I didn't see many candidates that would meet the criteria of a 2.376g metal composition. At one point I thought it might be foreign debris on the coin, but when examining it closely I didn't see anything abnormally clinging to it. The diameter and thickness matched to the exact specifications of a standard 1974 Roosevelt dime as well. I did my due diligence and calibrated my scale and tested it out with some known weighted coins and objects and everything came out okay. The scale is accurate to at least 1/1000 of a gram.
At this point, I figured that I've had enough fun trying to figure this out and there's probably a whole forum of folk smarter than me that might have a better idea than trying to find every coin's weight ever minted at the Philadelphia mint and crunching those numbers...ugh! I'm getting a headache even thinking about that...

Thanks for all you do!
~pog