The number of bullets a rifle can hold varies depending on the magazine capacity.
Generally, modern sporting rifles often utilize standard capacity magazines that hold 30 rounds. However, this number can be affected by state laws. Some states, following the 1993 Federal Assault Weapons Ban, have imposed limitations on magazine capacity, often restricting them to 10 rounds or less.
Therefore, the answer depends on the specific rifle and the legal restrictions in the relevant jurisdiction.
