The slapshot is faster (or as Goalies say, “Heavier” due to its impact) than other shots in Hockey, and because of the violent motion involved, somewhat less accurate, and also takes longer to execute. The secret is to have the blade of the stick strike the ice about 1-2 inches in front of the puck. This causes the shaft to bend significantly and by the time the blade hits the puck, there is tremendous energy loaded in the shaft which then gets tranferred to the puck in a spring like fashion! This took me countless hours at the Rink at at home in the garage to master.
At the yearly NHL All-Star “Hardest Shot” skill competition, the winning slapshot typically propels the puck at around >105 miles per hour!