ALBANY—Gov. Andrew Cuomo and state lawmakers are planning to revise a centerpiece of the state's new gun-control laws: Limitations on the capacity of gun-ammunition magazines.

The laws, passed in January, made it illegal to own a magazine with more than seven rounds. The amendment currently under consideration would legalize 10-round magazines, but it would remain illegal to load the magazine with more than seven rounds, unless an individual is at a firing range or a shooting competition, Mr. Cuomo said.

The governor, a Democrat, said the intended changes would correct an "inconsistency" in the bill. Ammunition manufacturers don't make seven-round magazines, Mr. Cuomo said.

"The clarification is, you can have a magazine that can hold 10 bullets, but you can only have seven bullets in the magazine unless you are at the range or in competition," Mr. Cuomo said.

Prior to laws passed in January, the state banned ammunition magazines larger than 10 rounds, except on weapons made before 1994.