Quote Originally Posted by Fuchs View Post
Propellant lots etc:
It's not necessary to have PGMs to compensate for such variances. It's been standard procedures with several MRL systems to shoot one rocket, observe with radar, then self-destruct the rocket (timer) in the air in order to prevent that the following rocket salvo with corrected aim loses the surprise effect.
It adds a few seconds and is not very efficient with large rocket calibres, but it works.
That system increases accuracy, but it will not give the the 1M CEP that you can get through the GPS/INS systems that GMLRS uses.

Rockets don't use propellant lots. They are standard. Artillery rounds do use the propellant lot code to determine MVV.