I'm looking at an 11lb-capacity propane canister (2 1/2 gallons). The canister itself ostensibly weighs 13 pounds. If filled to the max (which you're not supposed to do anyway), is the maximum this filled canister going to weigh be 24 lbs (propane and tank together)?
I lifted the propane tank in-store yesterday, and it felt heavier than 13 lbs, but was empty. I didn't weigh it, so I could be mistaken, but it felt much heavier. Would the air inside it make all that much difference?