Russia has begun using large numbers of a missile originally designed as a training target for air-defense crews, despite the weapon being significantly less accurate than the ballistic missiles Russia normally uses for precision strikes. The RM48U is now being launched against targets in Ukraine from S-400 air-defense systems.

The development comes as Russia has sharply increased its use of ballistic missiles against Ukrainian cities in recent months, while Ukraine faces a critical shortage of the interceptors needed to defend against them. Russian forces had more than tripled their monthly ballistic missile launches between April and July, according to Ukrainian military intelligence, as Ukraine's stocks of Patriot interceptors have dwindled.

More than half of the 228 ballistic and hypersonic missiles Russia launched in July and the first eight days of August were RM48Us, according to Ukrainian data reviewed by Reuters in an investigation published on 18 September.

A training missile turned into an inaccurate weapon

The RM48U was originally developed as a training target to help Russian air-defense crews practice intercepting incoming threats. It was not designed as a precision ground-attack missile.

Ukrainian investigators told Reuters that the missile is less powerful and less accurate than the Iskander, Russia's main short-range ballistic missile. They estimate that RM48Us deviate from their intended targets by around 300 meters on average.

The missiles nevertheless follow a high-speed ballistic trajectory when used in combat, making them difficult for Ukrainian air defenses to intercept.

Russia launches the RM48U from S-400 systems, repurposing part of its air-defense arsenal for offensive strikes.

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Ukraine strikes two Russian S-400 launchers in Bryansk. The same systems were used to attack Kyiv overnight.

Russia is using inaccurate missiles at scale

The number of RM48U launches increased sharply during the summer.

Russia launched 158 ballistic and hypersonic missiles against Ukraine in July, according to Ukrainian data reviewed by Reuters. Of those, 87 were RM48Us.

Russia then launched another 36 RM48Us among 70 ballistic and hypersonic missiles fired during the first eight days of August.

July was the highest month for Russian ballistic and hypersonic missile launches since the start of the full-scale invasion, according to the Ukrainian data.

The surge in RM48U use also coincided with a major decline in Russia's use of Iskanders. Russia launched more than 100 Iskanders in June but only 38 in July.

The shift indicates that Russia is using the less capable RM48U to sustain its ballistic missile campaign to continue causing indiscriminate destruction in Ukrainian cities while conserving more capable weapons.

RUSI analyst Sidharth Kaushal told Reuters that this allows Russia to preserve missiles such as Iskanders, as well as other more advanced weapons, for future attacks.

Less accurate does not mean less dangerous

The RM48U's poor accuracy has already had deadly consequences.

Ukrainian investigators concluded that an RM48U struck a railway platform in the Brovary district of Kyiv Oblast on 5 August, killing eight people. 

According to Ukrainian prosecutors cited by Reuters, the missile's warhead also scatters metal fragments over a wide area.

The attack illustrates the danger of Russia using a weapon that was never designed for precision strikes in populated areas. Even when the missile misses its intended target, its large deviation can leave civilians and civilian infrastructure within the affected area.

Russia denies deliberately targeting civilians and says it strikes military and other strategic targets.

Russia plans to produce more

Ukraine's military intelligence told Reuters that Russia plans to produce 480 RM48U missiles in 2026, more than twice the 200 produced last year.

That would give Russia a growing supply of a relatively simple ballistic weapon that can be used alongside its more sophisticated missiles.

The large-scale deployment of the RM48U represents a new development in Russia's ballistic campaign: a missile built to serve as a training target for air-defense crews is now being used as an offensive weapon against Ukraine.

At a time when Ukraine is struggling to replenish the scarce interceptors needed to stop Russia’s ballistic missiles, Moscow is expanding the range of weapons it can use to strike Ukrainian cities, killing more civilians and destroying more civilian infrastructure with each escalation.