338 lapua magnum ammo for sale that’s in stock at Foundry Outdoors. We carry a wide variety of affordable and high-quality ammunition. Browse our large selection of in-stock ammo, 338 lapua ammo, and most popular calibers and brands, including Winchester ammo Federal ammo, and Hornady ammo. Find many ammo calibers and gauges of ammo for your firearm. Order now & save big!