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250 grams is about one-and-seven-tenths times as heavy as a Baseball
In other words, it's 1.72068107071120 times the weight of a Baseball, and the weight of a Baseball is 0.581165224062510 times that amount.
(MLB rules)
Per Major League Baseball rules, a baseball must weigh between 141.747615625 g and 148.83499640625 g. A major league pitcher can throw a baseball at up to 150 kph (91 mph) (with a fastball pitch), with record-setting pitches as fast as 171 kph (106 mph).
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