While New York's magazine limit is 10 rounds loading a magazine with more than 7 is illegal even with CCW permit. More than 7 round maybe loaded when hunting, in one's home, or when at a shooting range. The .22 tubular magazine is exempt from the 7 rounds law. Law enforcement both active and retired are exempt from the round and magazine limits.
Some states have a limit on the number of rounds a magazine can hold. In these states purchasing, selling, or transferring a magazine of larger size than the law allows is a crime. In some cases magazines that were bought before the law was put in place must be registered with the police, in others they may only be loaded to the number of rounds legal in a state. The law may vary in some cities.