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974 grains is about two-fifths as heavy as a Billiard Ball.
In other words, it's 0.38718012422360 times the weight of a Billiard Ball, and the weight of a Billiard Ball is 2.58277720739220 times that amount.
(American-style, WPA specifications)
Per the World Pool-Billiard Association, a billiard ball weight must weigh between 2,406.250 grains and 2,625 grains. According to legend, the difficulty in obtaining elephant ivory for the manufacture of billiard balls in the 19th century inspired the search for a replacement material, which led to the development of the first industrial plastic.
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