410 ammo is the stuff you’ll want for firing in the popular 410 shotgun. This round is usually called the "410 gauge" but is more correctly named the 410 bore.
The 410 designation is not a gauge but an actual bore size of .410 inches (if it were actually measured in gauge, it would be approximately 67.6 gauge). Regardless of what you call it, it still functions the same and is a wonderful little round. Historically, 410 ammo first appeared sometime in the mid 1850s and gained much greater popularity around 1900.
Early shells for the 410 were only about 2 inches long compared to today's modern loads ranging from 2.5 to 3.0 inches. Being the smallest of the shotgun offerings, it has the least amount of recoil as well as the least amount of shot to send toward the intended target. Some consider it a wonderful first shotgun for younger and smaller shooters. The 410’s minimal recoil is easy on the youngster's shoulder. However, it is somewhat harder to hit moving targets with the 410 since it contains much fewer shot than larger gauge guns. This caveat could also be a plus since it requires the shooter to really hone his or her aiming and target tracking skills.
Guns in 410 bore usually have full chokes in an attempt to give them the tightest possible patterns with their diminutive number of shot. The 410 can be a handy companion in one's mission of dispatching pests. Some use the 410 for a home defense gun - it can be found in both rifles as well as revolvers; however, although more easy to handle, it is much less effective than the 12 gauge often used for home defense. There are numerous factory-loaded offerings available for sale for the 410 shooter.