Let's first do the math (sorry, this is a habit I've recently developed due to endless of research tasks):
Here we know directly from the book that the copper jar weighs about 400 "jin". If we assume 1jin = 500g=0.5kg, then we have 400x0.5=200kg. The total weight = 200kg + weight of wine inside. So how would we calculate the weight of the wine inside the jar?
According the book, the total amount of wine inside the jar is:
total wine = 14口 (mouthful) + 54碗 (bowl) + 小半缸 (about 1/3 jar)
We can basically ignore the 14 mouthful. The book also tells us that
小半缸(1/3 jar) = 2x半桶 (half bucket) = 1桶 (bucket) = 数十大碗 (dozens of bowls)
If we assume the jar was 2/3 full and a bucket of wine is 50lb = 22.68kg (use water to estimate because wine in ancient times are very diluted), which are very reasonable assumptions, then we have:
total weight of wine = 2x22.68kg = 45.36kg
That also means
小半缸(1/3 jar) = 1桶 (bucket) = 54碗 (bowl) = 数十大碗 (dozens of bowls)
wine inside the jar = 2桶 (bucket) = 108碗 (bowl) = 45.36kg
1碗酒 (1 bowl of wine) = 45.36kg/108 = 0.42kg = 420g
Looks like all our numbers are reasonable here. So following this model, the weight of the jar and the wine inside is:
total weight = weight of jar + weight of wine inside = 200kg + 45.36kg = 245.36kg
Since Qiu Chuji only used one hand, lets double the weight:
2x245.36kg = 490.72kg
Comparing 490.72kg to 2177.24kg I had calculated with Mr. Huang Zhong, I still say Mr. Huang Zhong is very impressive. The book didn't say how many hands Mr. Huang Zhong used, so I assume he used two hands. If he only used one hand, then I am out of words!