I have a question about wrong planchets

Error Coins Planchet Errors
1

581995059_2297658700740580_5007612634897389572_n
581995059_2297658700740580_5007612634897389572_n1126×1500 110 KB

582115252_25028749280112931_9046531307524082638_n
582115252_25028749280112931_9046531307524082638_n1126×1500 107 KB

582410054_4129784533938891_2553899854287142624_n
582410054_4129784533938891_2553899854287142624_n1126×1500 101 KB

the 1965 4 grams lighter than the other. anyone tell me anythiung thanks