The various Federal agencies (Border Patrol, Customs, etc.) used to carry a +P+ 110g 38 Special round in the revolver days. This was before they all went to one kindor other of semi auto back in the 1980s. The government bought this load in quantity (sort of like the current furor over the 1.6 billion rounds for Home Land Security). That was no doubt a standard issue round from that era that got left on a public range and was picked up with all the other 38 Specials.
PS: None of the federal officers I knew back then thought much of the cartridge. They all would have preferred something of larger caliber and/or more authority.