Centerfire, rimfire and shotshell ammunition by the box and case. Practice ammo is full metal jacket; defence and hunting loads use hollow points or bonded soft points.
Firearms ship to a licensed FFL dealer in your state; ammunition and accessories ship to you where state law allows.
Before you order
Buy defensive ammo in the same weight you practise with.
Brass cases are reloadable; steel cases are cheaper.
Some states require ID or a permit to buy ammunition.
Questions buyers ask
Do you ship ammunition to my house?
In most states, yes. A few states such as California require ammunition to go through a licensed vendor.