They usually mean a pistol carried in the woods for fending off an angry bear. Hang around the gun store long enough and you’ll hear someone talk about a “bear gun”. The 10mm will penetrate more than 9mm, and will create a much larger wound on a though skinned bear. 10mm AUTO is much more adequate and is considered the minimum pistol for bear defense. 9mm vs 10mm for bear defenseĪ 9mm pistol isn’t adequate for bear defense. The 10mm AUTO penetrates about 20 percent more than a comparable load in 9mm and creates up to twice the vascular damage. I’m no mathematician, but that certainly equals more power and penetration than the 9mm. ![]() Now let’s see what measurable gains new can see in 10mm from the 9mm.ġ1% wider destroyed tissue area, 45% more bullet weight, and 10 percent more velocity. The average velocity of a 9mm round is 1,100 fps while the average velocity of a 10mm round is 1,200 fps. That’s a 45% gain in bullet weight over the 9mm. The average 9mm bullet is 124 grains and the average 10mm bullet is 180 grains. The 10mm is slightly wider, but also much faster and heavier. In terms of penetration, the 10mm wins over the 9mm every day. The larger diameter of the 10mm reduces the time it takes for a well-placed shot to cause a devastating loss of blood.īecause the 10mm is not only bigger but penetrates further than the 9mm, it is significantly more powerful and can destroy significantly more tissue. Thus, the wider the bullet, the more tissue will be destroyed. In this case, about 11 percent more.Ī pistol bullet only the tissue that directly touches the bullet. A bullet’s power can be summed up in how much tissue it destroys. Not only does that allow for a heavier bullet, but the circumference adds more wounding area. Does that really matter? Yes, it does.Ī bigger difference is seen in the circumference. 400 caliber with a circumference of 1.24”. 357 caliber (diameter) with a circumference of 1.12”. Let’s pitch these two cartridges up with a few more sets of numbers. Every shot from 10mm is sort of like getting hit by one and a half rounds of 9mm. It may not sound like much when put like that, but it is ballistically significant. 2 rounds of 10mm have about as much energy as 3 rounds of 9mm. 9mm +P reaches 450 ft/lbs., while full power 10mm reaches over 700 ft/lbs. of energy, while 10mm handguns create an average of 530 ft/lbs. ![]() 9mm handguns create an average of 350 ft/lbs. The 10mm averages 51.4 % more power than the 9mm. ![]() All bullets are fmj unless noted How Much More Powerful is a 10mm than a 9mm? each board is roughly equal to 8 inches of soft flesh. Everything above the 10mm is in the more powerful category and generally has a “Magnum” in the name to sell the point. Everything below 10mm is in the “lesser” category. The 10mm is a bridge between standard pistols cartridges and the magnum pistol cartridges. It worked, although the FBI ended up going with the 40 S&W, then the 9mm that they use today. That’s required for the bullet to reliably feed in all the various models, including the antiques.ġ0mm, also called 10mm AUTO was developed in the ’80s as an FBI field agent gun that would pack nearly. Most 9mm bullets are sharply rounded, almost pointed. It generally fires a 115-grain bullet going 1200 fps or a 124-grain bullet going around 1100 fps. 10mm is higher pressure, higher energy round that has more uses than the 9mm.ĩmm was designed in 1901 and it’s hardly changed since then. The 9mm is a “good enough for most uses” option, but certainly not a high-power pistol round. There is a huge chasm of difference between these two cartridges. If it has any other name than these, it’s not “the 9mm”. These are all interchangeable, but there are many other 9mm cartridges that are not. Over the years, different countries have given the cartridge different designations. It can be listed as 9mm Luger, 9mm Parabellum, and 9×19. What’s the Difference Between 9mm and 10mm Pistols? I’ll go over the weaknesses and strengths of both, and give recommendations on what you should get. 9mm is good for protection while 10mm can be used for hunting.īoth of these cartridges are useful for defense, but there are certain instances where one is better than the other. 40 bullet weighing 180-230 grains with energies up to 700 ft/lbs. 357 bullet ranging from 115 to 147 grains with up to 450 ft/lbs. I’ve shot thousands of rounds in both calibers.Ī 9mm fires a.
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