AT Weight Question

[Lowpuller]

Help please?

From ATs website

J350W propellant weight 375g
Hardware RMS 38/720 weight 212.3g
Loaded Motor 665g



What am I missing 375+212.3= 587.3g

What makes up the 77.7g difference

 

[mikec]

What makes up the 77.7g difference

All the stuff in the reload that's not propellant. Liner, nozzle, etc. Possibly the delay element depending on how that's counted.

 

[Lowpuller]

Thank you