I have two abnormally overweight antoninianii, which I find interesting. The Gordian III is 6.55 grams, and the Tetricus I is 5.97 grams. Most Gordian III ants range between 3.5-4.5 grams, and most Tetricus I ants are around or under 3 grams.
Gordian III
AR Antoninianus
240 CE Rome mint
IMP GORDIANVS PIVS FEL AVG, Bust of Gordian III, radiate, draped, cuirassed, right
VIRTVS AVG, Virtus, helmeted, in military attire, standing front, head left, holding branch in right hand and spear in left hand; against right side, shield resting
24mm, 6.55 grams
RIC IV(III) 71, RSC 338
Tetricus
AE Antoninianus
271-274 CE
Cologne mint
IMP TETRICVS P F AVG, Bust of Tetricus I, radiate, cuirassed, right
LAETITIA AVGG, Laetitia, draped, standing left, holding wreath in right hand and anchor in left hand
21mm, 5.97 grams
RIC V Tetricus I 88