It's about one-fifth as heavy as a Baseball
In other words, 370 grains is 0.165017421602790 times the weight of a Baseball, and the weight of a Baseball is 6.0599662162161 times that amount.(MLB rules)
Per Major League Baseball rules, a baseball must weigh between 2,187.50 grains and 2,296.8750 grains. 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).
It's about one-tenth as heavy as a Billiard Ball
In other words, 370 grains is 0.147080745341610 times the weight of a Billiard Ball, and the weight of a Billiard Ball is 6.79898648648670 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.
It's about one-tenth as heavy as a Puck (Hockey)
In other words, 370 grains is 0.147080745341610 times the weight of a Puck (Hockey), and the weight of a Puck (Hockey) is 6.79898648648670 times that amount.(Ice hockey)
A standard ice hockey puck weighs between 2,406.250 grains and 2,625 grains. Hockey pucks can be shot or passed at speeds of up to 160 kph (99 mph) during games.
It's about nine-and-a-half times as heavy as a Penny
In other words, the weight of a Penny is 0.10 times 370 grains.(United States) (formally one-cent coin) (Union shield design, 2010-present)
The weight of a United States penny is 39 grains. According to a 2010 report by the United States Mint, the cost of manufacturing and distributing a penny is $0.0179 — more than its face-value.
It's about one-tenth as heavy as a Hamster
In other words, the weight of a Hamster is 10 times 370 grains.(for Syrian hamster, a.k.a. golden hamster, a.k.a. Mesocricetus auratus; adult)
An adult Syrian hamster has a typical weight of about 3,000 grains. Known for transporting food in the pouches of their cheeks so that they can bury it later, some hamsters can store up to 400,000 grains of food in their borrows.
It's about one-fifteenth as heavy as a Human Heart
It's about thirteen times as heavy as a Playing Card