225lbs (100kg) sounds too small for such a rocket. Other sources give it (Fatah-110A) a warhead payload of 500kg

http://www.globalsecurity.org/wmd/world/iran/mushak.htm

FATEH-110 (Mushak-120)

Range Kilometers 130 -170

Diameter Meters 0.450-0.610

Height Meters 8.9

Stages 1

Launch Mass Kilograms 2,450

Warhead Mass Kilograms 500-600

FATEH-110A

Range Kilometers 200-210

Diameter Meters 0.610

Height Meters 8.9

Stages 1

Launch Mass Kilograms 3.550

Warhead Mass Kilograms 500

Sorry for the English... I was a bad student in Hebrew school

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