Yes, they would weigh 3.1 grams. But it's not that rare small date 1982 D you may have seen on a YouTube video making your hunt for something that there is only one of. FYI, yours is a large date anyways.
Yeah 82 does have the heavier copper coin 3.11g along with the zinc 2.5g. Like clawcoins said it better
Oh sorry, no question. Just showing the difference, and making the note that if it doesn't have a D, then it's not the coveted gazillion dollar coin.