I have an ADAC list from about 1990. It is divided into two parts. One part lists ammunition by ADAC; the other lists the same ammunition but by NATO Stock Number (NSN). The ADAC list was republished fairly regularly, perhaps once a year? Around the time that I left, in 1993, there was a drive on to weed out much of the list that related to obsolete ammunition. By that time the list seemed to consist of more ammunition that was obsolete, rather than ammunition that was current or obsolescent. I don't know or remember if the list was eventually weeded. I will see if I can find mine and give you the info that answers your question. An ADAC list may give you a rough idea of when specific natures were declared obsolete but I feel sure that there will have been some other, more specific, means of declaring when a nature was made obsolete. The ammunition managers in DLSA may have regarded this as a low priority in the big scheme of things, or perhaps were reluctant to knock them off the inventory if they could not be certain that all had been expended or destroyed. Until the introduction of Automatic Data Processing (ADP) in the 1980s ammunition was accounted for in `Kalamazoo' files. Even after the introduction of ADP the Kalamazoos were kept on as a kind of shadow account, in case the ADP failed. In Belize in 1988, for some reason we had small amounts of some 15 - odd year old stocks of 7.62 mm ball SAA and 2 Inch Mortar smoke and illuminating bombs that dated back to the mid 1960s. In 1980 there was Exercise Elbow Room, a demolitions programme to get rid of obsolete ammunition stocks, some of which dated back more than 35 years. Some of the ammo was perfectly serviceable, it was just old or surplus to requirements, or the introduction of more powerful detonators, for example, meant that 1 Lb CE/TNT blocks, having small holes for detonators, could not easily be used with the new detonators. Meanwhile new ammunition, e.g. ammo for the 155 mm FH 70, was trickling into service and the depots only had so much room to store it. Some ammo was even bought on a sale or return basis for operations such as the first Gulf War, so may not have appeared on an ADAC list.