Dive summary:

• The Army used to sell their old artillery shells for scrap but Picatinny munitions experts have figured out that instead of being used for scrap metal, the Army can recycle the shells and use them for training projectiles.
• The training projectiles normally used by the Army are expensive to produce and have no second life possibility outside of being sold as scrap, by recycling the casing, the Army is expected to save an average of $10 million per year over the next 20 years.
• Another aspect that will save the Army money is that the recycled training projectiles will be filled with less costly IMX-101, which has the same explosive effect as TNT but is far less likely to explode if in a fire, shot at or hit by a roadside bomb during transport.

From the article:

The old shell bodies and bases were originally going to be sold as scrap metal. However, the M1122 program salvages the old projectile body and base, removes and demilitarizes the submunitions, and reuses the metal parts to produce 155mm M1122 high explosive rounds. The M1122 will be the primary 155mm training projectile for HE artillery fire missions. It will replace two practice projectiles that are more expensive and used for training.

"It's a win-win situation," said David Konda, the project management officer for the recycling program that produces the M1122 high explosive training round. "It's cheaper than the M804A1 that we use for training and the M107 that we use for training and combat. ...