Rheinmetall Doubles Powder Output

In a valley in Upper Bavaria, with chemical-processing halls tucked between the alpine foothills, Rheinmetall is starting work on what it says will be Europe's largest propellant powder factory. The expansion at Aschau am Inn will more than double production, from about 1,700 tonnes to 4,200 tonnes a year. By 2028, the plant is meant to be making more than one million modular charge units (Zeit, Bloomberg).

That matters because the shortage is not only in the parts of ammunition people can picture: warheads, shell bodies, metal casings. It is also in the powder that burns inside the barrel and sends the round on its way (Süddeutsche Zeitung). Without enough propellant, a shell is just expensive metal.

Aschau is genuine progress. It is also a familiar European defence problem: public money is helping private industry expand capacity, but there are no published rules showing who gets the output first.

The gap propellant exposes

In March 2023, EU member states promised to deliver one million artillery rounds to Ukraine while also rebuilding their own depleted stocks (Council). They missed the target. Czech and Polish reporting later traced the problem further up the chain: NATO countries face serious shortages of nitrocellulose and TNT, the basic chemistry needed before assembly can even begin (Novinky, RMF24).

Aschau sits directly on that bottleneck. Its connection to Ukraine is not theoretical either. Rheinmetall's July 2026 deliveries reportedly combined shells from Unterlüss with DM72 propelling charges from Aschau and from its sister Nitrochemie site in Wimmis, Switzerland (Warsight).

The EU has built three funding tools to deal with the shortage. ASAP, the Act in Support of Ammunition Production, put €500 million into removing factory bottlenecks (ASAP Regulation). SAFE, adopted in May 2025, added a €150 billion loan instrument for defence investment (Council). Both move money into the system. Neither gives Brussels the power to decide who receives Rheinmetall's next tonne of powder.

That is the awkward bit. Rheinmetall is a private company. Its allocation follows contracts and margins, not EU or NATO instructions. Governments can buy propellant through procurement. NATO can set targets and coordinate demand. But there is no public priority framework showing how expanded output will be divided between Ukraine, national stockpiles and alliance reserves.

Relief and fragility at once

European capitals will welcome the extra capacity. They will also ask who controls it.

Poland is treating the expansion as useful, but not enough. Mesko's Pionki facility now has serial production capability for modular propellant charges after a technology transfer, and Poland's Armament Agency has signed a contract worth more than PLN 13.5 billion for hundreds of thousands of 155mm rounds (Milmag). Warsaw wants the supply. It does not want to depend on a single Bavarian valley.

Finland points to the second weakness. The Vihtavuori powder plant, run by Nammo, had an accident that interrupted an expansion project (Yle). Even friendly, domestic capacity can disappear from the schedule after one safety incident. Europe's propellant production remains concentrated among three companies: Rheinmetall, Eurenco and Nammo. More Bavarian output eases scarcity, but it also leaves Europe relying on a very short list of producers.

The chemistry before the factory floor is another constraint. Nitrocellulose, made from cotton linters, is still reported as a pressure point that a single powder plant cannot solve. A more resilient supply chain would need investment below the visible factory expansion: raw materials, chemical precursors and trained workers. Those layers are much harder to see in EU funding announcements.

Public money, private allocation

Aschau tackles the right shortage, but with three limits. Full capacity is not due until 2028, too late for Ukraine's immediate battlefield needs. Three private producers still dominate Europe's powder output. And EU and NATO institutions publish ammunition targets without audited, component-by-component breakdowns for powder, fuzes, TNT and charge modules.

The accountability gap belongs to governments. No member-state defence ministry, and no EU institution, has published rules showing who gets priority when production rises. Until that changes, public money is expanding private capacity without proving public control.