"jack" wrote in message
. ..
The barbeque sized ones; about how much are they full and empty?

The last one I had that was empty weighed exactly 17 lbs. 14 oz. on my
refrigerant scale which is fairly accurate. The new one weighed 37 lbs. 4.5
oz. full, and the tare weight is listed as 17 lbs. Which gives a net of 20
lbs and 4.5 oz. of propane which is interesting because it's sold as 17 lbs.
net weight, as many exchange cylinders are now (Blue Rhino, etc.).