Glaser Safety Slugs. Expensive but, hey...your potential location/scenario is exactly what they were designed for.
Scroll halfway down this linked page. Decent review.
I tested the very earliest Glasers (way back when) and I was satisfied.
I also remember the Glaser testing on some decently large sized live oinkers and the performance was satisfactory.
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Glaser Safety Slug
From Wikipedia, the free encyclopedia
Glaser Safety Slug is a frangible bullet made by Glaser Safety Slug, Inc., a small American ammunition company based in Sturgis, South Dakota (the same location as Cor-Bon). The company was founded in 1975 by Armin Glaser the same year as the Glaser Safety Slug was developed by Jack Canon.
The original round was a hand-made hollow point bullet filled with No. 12 birdshot (0.05") with a flat polymer cap. To improve ballistic performance, a polymer-tipped round ball was introduced in 1987, and the current compressed core form was first sold in 1988. The formulation of the polymer was also changed in 1994 to improve fragmentation reliability.
The company produces bullets in around twenty calibers, from .25 to .45 for pistols and from .223 to .30-06 for rifles. Each caliber comes in two forms, 'blue' and 'silver', the latter having greater penetrating power due to the use of No. 6 birdshot rather than No. 12.
The projectile in the cartridge is of a much lighter weight than more conventional types of cartridges and so the projectiles always exit the bore at significantly higher muzzle velocities. The current bullet has a core of very tightly packed lead pellets. On impact, the bullet fractures along manufactured stress lines in the jacketóimparting all the bullet's energy very quickly rather than over-penetrating a target or ricocheting on a miss. The extreme light weight and fragility of the projectile make it unsuitable for long range firing or against protected targets.
The bullet design can produce large shallow wounds in flesh while failing to pass through structural barriers thicker than drywall or sheet metal. However, the wounds produced by these cartridges fail to produce penetration of depth and quality in targets as do more conventional bullet designs that retain all or most of their mass in a single piece. Some suggest that this lack of penetration makes them and other frangible ammunition suitable for use in environments where there is concern that a bullet that misses its intended target or passes through its intended target might accidentally strike a non-enemy.
The United States Federal Air Marshals Service tested and used the Glaser Safety Slug extensively in the 1970s and 80s on board commercial passenger aircraft to defend against hijackers. Published reports indicate that Air Marshals are now issued SIG-Sauer P229 pistols with a 12 round capacity firing conventional jacketed hollow point ammunition in .357 SIG caliber.
Compared to conventional ammunition, the rounds are very expensive (on the order of 15 to 20 times more) because of their design. Some sources [who?] report that they are less accurate, and that wounds vary greatly depending on impact angles.
Use of these cartridges in hand guns for defense/combat situations is controversial because some [who?] argue that a handgun simply does not have the barrel length or powder capacity to accelerate the super light projectile to the point that it can reliably produce wounds deep enough to incapacitate a person.
Similarly, using these cartridges in a rifle against large game is controversial because of the poor penetration that is achieved. However, use of these cartridges in rifle calibers against human targets is less controversial because some[who?] argue that the cartridges do produce acceptably effective wounds in man-size targets, while adding a certain safety benefit.
Agreed. Other options would be the Taurus Judge with #8 or #9 birdshot (many will tell you that this is pointless for self defense however), and another option perhaps a short barrel shotgun with birdshot (or even BB). I've got shells with #12 birdshot that I have used before in apartment settings.