NRA Women by B. Gil Horman posted on March 1, 2022
Often dismissed as ineffective for personal protection, .410 shotguns can get the job done when loaded properly.Discussing the use of .410-bore shotguns for home defense often ruffles some feathers. “You should get a 12-gauge shotgun,” they say. “That's the best shotgun for the job!” This sentiment is not untrue, but it's also not complete.
Let me be clear, combat shotguns chambered for 12-gauge shells are, shot-for-shot, among the best close-range fight stoppers yet devised. They throw an impressive amount of lead with nearly irresistible levels of force at across-the-room (3 to 7 yards) and across the house (7 to 15 yard) distances. Lew Gosnell, training director of Gunsite Academy, summed it up quite succinctly during a 12-gauge shotgun demonstration when he said, "Shotgun fights don't last for very long."
But due to Newtonian physics, 12-gauge levels of stopping power come at a price. Full-power shells filled with hard-hitting defensive payloads can generate intense levels of felt recoil. The shotguns themselves can be relatively large, heavy and too long in the stock, making them unwieldy for some folks. For this reason, a more complete statement regarding the defensive 12-gauge would be that it's best option if the home defender can manage it.
For this conversation, let's take a look at the reasons why one might choose to stage a .410-bore shotgun for home defense, some of the suitable .410 shotguns currently available and which types of .410 shells are a good fit for personal protection. Some of the guns and ammunition mentioned here fall under the “whatchagot”category of defensive options.
Why Choose a .410 Bore for Home Defense?
The top reasons for picking a .410 bore for home defense were touched on above, namely, gun size and felt recoil. The shotguns are slim, lightweight and often available in compact configurations with the same shorter 18.5" to 20" barrel lengths commonly used with 12-gauge security shotguns.
A Quick Note on Ammunition Performance
The scientific field of research known as ballistics is dedicated to understanding how firearms and their projectiles perform. What it boils down to for the home defender is this: Projectiles launched by a defensive handgun, rifle or shotgun must penetrate deeply enough that an attacker loses the ability to continue the assault.

.410-bore shells are available with a variety of projectiles.
But how much penetration is enough? Back in the late 1980s, the FBI’s Firearms Training Unit (FTU) established a series of ammunition performance protocols in which handgun rifle and shotgun rounds are fired into 10% ballistic gelatin. As a rule of thumb, they are looking for projectiles that travel through the gel to an optimum depth of 12” to 18”. Projectiles that penetrate less than 12” are not considered a good fit for home defense. This standard is used for the Clear Ballistics synthetic gel test results included below.
----
Which Shells for Home Defense?Here's what all of this ammunition testing information boils down to: Loading shorter-barrel .410-bore shotguns with buckshot loads, or defense-grade mixed payload shells, turns the gun into a viable low-recoil home defense option. This gun and ammunition combination launches more projectiles per trigger pull than a handgun but does so without the punishing recoil of a 12-gauge shotgun. But remember, birdshot and slugs should be reserved for sporting purposes.
More:
https://www.nrawomen.com/content/do-410-bore-shotguns-make-sense-for-home-defense/