The max lift weights of the C Q-jets seems very low to me? Less than 4oz?

Estes C5-3 is rated at 8oz

Estes C11-3 is rate at 6oz

Any thoughts?

C18-4 W
Motor Diameter: 0.698" (18mm)
Casing Length: 2.75" (70mm)
Total Impulse: 9.8 N-sec
Burn Time: 0.52 seconds
Average Thrust: 18 newtons
Delay Time: 4 seconds
Propellant Weight: 5.6 grams
Propellant Type: White Lightning
Motor Weight: 20.9 grams
Maximum Liftoff Weight: 113 grams

D16-4 BJ
Motor Diameter: 0.698" (18mm)
Casing Length: 2.75" (70mm)
Total Impulse: 12.4 N-sec
Burn Time: 0.79 seconds
Average Thrust: 16 newtons
Delay Time: 4 seconds
Propellant Weight: 9.9 grams
Motor Weight: 25.7 grams
Maximum Liftoff Weight: 128 grams

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If the Sky is the Limit, then,
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