.300 BLK vs 10mm For Home Defense

Setting up the .300 BLK vs 10mm home defense debate

The discussion opens with a compact, suppressed .300 Blackout being presented as an ideal home defense option: short, quiet, and effective. The counterargument is 10mm, suggested after a late-night YouTube research session, with the claim that it can rival .300 Blackout for home defense. The hosts frame the debate around which caliber is more suitable inside a home, not for general use. One leans toward .300 Blackout, emphasizing its advantages, while the other defends 10mm for its stopping power and affordability. They also briefly joke about 10mm’s capability against large animals and note that typical home defense distances are around 3 to 7 yards, though actual engagement distances depend on the layout of the house.

Ballistics, barrel length, and overpenetration concerns

The conversation shifts to why each host prefers a particular platform. The 10mm advocate cites stopping power and cost, plus the ability to have both a bedside pistol and a truck gun within a similar budget. The .300 Blackout proponent focuses on achieving strong terminal performance while preserving hearing, pointing out that a suppressed .300 Blackout will be significantly quieter indoors. Barrel length is discussed: a 6.75-inch barrel is considered sufficient for 10mm, while .300 Blackout is said to shine in a 9-inch barrel, with good powder burn even below that. They also touch on concealability and storage, comparing a 10mm pistol in a nightstand drawer to a folding .300 Blackout that can be kept by the bed. Overpenetration is addressed, with the .300 Blackout side emphasizing the use of defensive expanding bullets rather than full metal jacket for home defense.

Subsonic vs supersonic .300 BLK and 10mm performance

They explain that .300 Blackout was developed from a 7.62x35 parent case, necked down to accept a .30 caliber projectile, providing substantial powder capacity and energy in an AR platform. The .300 Blackout advocate notes that defensive loads with expanding tips help manage overpenetration, especially when used subsonic indoors. The ability to switch from subsonic to supersonic .300 Blackout simply by changing magazines is highlighted, allowing quiet operation in the house and higher-velocity performance outside. They compare bullet weights: the 10mm example shown is a 170-grain load, with 10mm commonly going up to around 225–235 grains, while .300 Blackout supers typically range from about 110 to 170 grains, with a 200-grain subsonic round shown for comparison. Velocity estimates are mentioned: a 16-inch 10mm carbine around 1,700 fps, and .300 Blackout supers roughly 2,000–2,200 fps, with subsonics kept under about 1,050 fps. Both acknowledge that at around 100 yards, especially with subsonics or 10mm, group sizes will open up, and they decide to settle some of the debate on the range.

Initial range impressions and recoil comparison

At the range, they revisit the long-running argument about 10mm versus .300 Blackout and agree to test both. The 10mm shooter goes first, putting a few rounds on target to evaluate feel, recoil, and overall shootability. The .300 Blackout shooter follows, using a suppressed setup and noting that hearing protection is less critical with the can. They immediately observe that perceived recoil in a 10mm handgun is noticeably stronger than in the .300 Blackout platform. When asked which configuration is preferable, the 10mm advocate admits a preference for a pistol-caliber carbine over a handgun if given the choice, but notes that not everyone has that option. The 10mm pistol is still framed as a practical bedside or “pillow” gun, while the .300 Blackout remains the favored dedicated home defense carbine.

Switching guns, optics, and suppressor effects

They swap firearms so each can experience the other’s setup. One runs a pistol-caliber carbine that feels similar to a Ruger-style pistol in form but functions as a PCC, featuring a non-reciprocating charging handle that sits close to the support hand. With longer arms, there is some concern about hand placement, but they note that training can mitigate this. The other shooter comments on the .300 Blackout’s much lighter recoil and quieter report, especially with subsonic ammunition through a suppressor. They then switch to supersonic .300 Blackout loads, immediately noticing more recoil and increased gas and back pressure toward the shooter’s face due to the can. The added “thump” is described as providing more perceived knockdown power. They remark that 10mm could also benefit from subsonic loads and a dedicated 10mm suppressor, though they do not have one available for testing during this session.

Folding-stock drills and handling observations

To further compare real-world handling, they set up a simple drill using both folding-stock carbines. Starting from a folded, deployed status, each shooter fires two rounds on a closer target at roughly 20 yards, then two on a farther target. One shooter experiences a magazine drop during the drill, but they complete the string and then switch roles. The 10mm carbine uses an extended magazine, while the .300 Blackout rifle is equipped with a magnifier, which is acknowledged as a slight advantage for longer shots. They discuss the mechanics of deploying folding stocks, noting that pulling one particular stock up and out is somewhat awkward and had to be staged mentally before the drill. Reloads are described as straightforward, with no major issues. The segment closes with an emphasis on how each platform feels in dynamic use, beyond just raw ballistics or cost, as part of the broader .300 Blackout versus 10mm home defense evaluation.