Ammunition and magazine laws in Iowa

724.22  Persons under eighteen — sale, loan, gift, making available — possession.
1.  Except as provided in subsection 3, a person who sells, loans, gives, or makes available a rifle or shotgun or ammunition for a rifle or shotgun to a minor commits a serious misdemeanor for a first offense and a class “D” felony for second and subsequent offenses.
2.  Except as provided in subsection 4, a person who sells, loans, gives, or makes available a pistol or revolver or ammunition for a pistol or revolver to a person below the age of eighteen commits a serious misdemeanor for a first offense and a class “D” felony for second and subsequent offenses.
...
5.  For the purposes of this section, caliber .22 rimfire ammunition shall be deemed to be rifle ammunition.
...
90 Acts, ch 1147, §7; 94 Acts, ch 1023, §119; 94 Acts, ch 1172, §56; 2017 Acts, ch 69, §28, 29, 50; 2017 Acts, ch 170, §49, 51, 53, 54; 2025 Acts, ch 27, §4, 5
Subsection 2 amended

724.1  Offensive weapons.
1.  An offensive weapon is any device or instrumentality of the following types:
...
f.  Any bullet or projectile containing any explosive mixture or chemical compound capable of exploding or detonating prior to or upon impact, or any shotshell or cartridge containing exothermic pyrophoric misch metal as a projectile which is designed to throw or project a flame or fireball to simulate a flamethrower.
...
724.3  Unauthorized possession of offensive weapons.
Any person, other than a person authorized in this chapter, who knowingly possesses an offensive weapon commits a class “D” felony.

(x)(1) It shall be unlawful for a person to sell, deliver, or otherwise transfer to a person who the transferor knows or has reasonable cause to believe is a juvenile—
(A) a handgun; or
(B) ammunition that is suitable for use only in a handgun.
...
(5) For purposes of this subsection, the term "juvenile" means a person who is less than 18 years of age.

Small Arms Ammunition: Ammunition is classified as a Division 1.1, 1.2, 1.3, or 1.4 explosive, depending on the degree of hazard. Ammunition that is regulated as a Class 1 explosive and designed to be fired from a pistol, revolver, rifle, or shotgun, as well as associated primers and blank cartridges (including those designed for tools) and propellant powder for use in any firearm, is prohibited from mailing.
...
Shotgun Hulls, Empty Casings, Nonmetallic Shotgun Hulls, or Casings Without Primers: These articles are not classified as explosives or hazardous materials under 49 CFR and, therefore, are mailable, subject to the applicable mailing rules (refer to 224).