However, the. The table below shows common performance parameters for several. Bullet weights ranging from to grains 7. Loads are available with energies from foot-pounds force J to over foot-pounds force J , and penetration depths from 9 inches mm to over Key: Expansion — expanded bullet diameter ballistic gelatin. Penetration — penetration depth ballistic gelatin.
PC — permanent cavity volume ballistic gelatin, FBI method. TSC — temporary stretch cavity volume ballistic gelatin. Because of its relatively high velocity [7] for a handgun round, the.
However, it does not quite reach the performance of the. Offsetting this general slight disadvantage in performance is that semi-automatic pistols tend to carry considerably more ammunition than revolvers. The Virginia State Police has reported that attacking dogs have been stopped dead in their tracks by a single shot, whereas the former grain 9 mm duty rounds would require multiple shots to incapacitate the animals.
The bottleneck shape of the. Flat point bullets are seldom used with other autoloader platforms because of feeding problems; however, such bullets are commonly seen in the. The "Accurate Powder" reloading manual claims that it is "without a doubt the most ballistically consistent handgun cartridge we have ever worked with.
From left to right: 9mm , 7. The goal of the. With a simplistic approach to physics, recoil being directly proportional to "muzzle velocity x bullet mass" due to conservation of momentum , the recoil of the. Of course, other considerations affect the user's perceived recoil, such as the weight of the weapon, front to back balance, moving mass, height difference between the shooter's grip parallel to the barrel, and grip. In comparing the energy levels of premium self-defense ammunition the muzzle energy of ft.
Reliably hitting those internal organs or CNS is going to stop the fight a lot quicker than hitting the extremities arms, legs, etc. The truth is that 2 is dependent upon the mental state of the bad guy and has little to do with the caliber that they are shot with. A bad guy high on PCP and feeling like the next incarnation of The Rock will be able to take multiple hits and stay in the fight there are multiple police reports to attest to this.
In contrast, for criminals like car-jackers or burglars, often any show of force is enough to make them retreat or surrender. So, in this case, a. This means that Stopping Power can only truly be quantified by 1, which was damage to internal organs and the CNS.
So, this means we should all just carry 9mm because many shooters report better accuracy with that cartridge, right? Why is it then, that many proponents and actual end-users of the SIG consistently report favorable results of the SIG round in the field?
Your standard grain bullet fired from a SIG will have a muzzle velocity of fps and exert foot-pounds of energy while a grain bullet fired from a 9mm will clock in at fps and foot-pounds of energy.
However, the real-world test results show something else entirely. Furthermore, as both cartridges fire the same diameter bullet 0. One thing that is not identical between the SIG and the 9mm is the temporary wound cavity caused when the bullet impacts soft tissue. Sometimes referred to as a stretch cavity, the temporary wound cavity is caused by the rapid transfer of energy to the target from the bullet impact.
As you can see in the FBI ballistic gel data pictured here, the SIG shows a larger temporary wound cavity and tissue disruption when compared to the 9mm. This will increase blood loss which can aid in incapacitating the target. This data would suggest that the SIG can cause more damage to a bad guy due to the increased foot-pounds of energy it can transfer to the target while having the same permanent wound cavity as a 9mm as they fire the same diameter bullet.
Although stopping power is not something that is quantifiable, there are several other factors that we need to consider like recoil. As the SIG is simply a necked-down 10mm Auto case , it is naturally a high-pressure round.
The higher velocity that the SIG offers comes at a price and that price is felt recoil as well as wear and tear on the handgun, especially the polymer-framed variety like Glock. Added recoil means slower follow-up shots, as shooters must fight the recoil to get the sights back on target more for the SIG than the 9mm. It also means that the SIG requires more training to shoot accurately as shooters with smaller hands or smaller frames will have a harder time controlling the firearm during the recoil impulse.
The muzzle blast from the SIG can also be an issue for an inexperienced shooter as it will slow sight re-acquisition in low-light shooting situations. Furthermore, all that added pressure created by the SIG will cause a firearm to wear out faster. And although most of us will never shoot a semi-auto handgun enough to wear it out entirely, recoil springs and other small parts will need to be replaced more frequently with a SIG handgun than compared to a 9mm.
In terms of recoil and controllability, the 9mm Luger is clearly the superior choice. Magazine capacity favors the 9mm Luger. Standard Glock 17 magazines can hold 17 rounds of 9mm Luger plus one in the chamber. On the other hand, full-sized Glock 31 magazines can hold 15 rounds of SIG. However, if you EDC your pistol and 1 extra magazine, that translates into 4 rounds difference.
And that could make a difference in a gunfight. There are dozens of different handgun offerings for 9mm as every major firearms manufacturer has at least one pistol chambered in 9mm Luger.
Furthermore, ammo for 9mm is plentiful and relatively inexpensive compared to other centerfire pistol ammo. In general, SIG ammo , an even cheaper full metal jacket FMJ practice ammo, is going to be approximately double the price of 9mm. At the time of writing, Sig Sauer and Glock are the only handgun manufacturers who have factory handgun offerings in SIG.
Although SIG firearms are limited and ammo is harder to come by, there is a solution to this problem that many shooters might have overlooked. Conversion barrels are available for multiple firearms if you love SIG but your preferred manufacturer does not have an offering. For this reason, the manufacturer is commemorating the historic event with a Limited-Edition rifle. Their thigh holsters carry Sig P pistols.
While you might see a few agents surrounding the president at a time, dozens more are working behind closed doors to ensure the safety of the Commander in Chief. Comment s. Click to share on Facebook Opens in new window Click to share on Twitter Opens in new window Click to share on Pinterest Opens in new window Click to email this to a friend Opens in new window.
The Secret Service Secret Service agents are responsible for protecting the serving president and their family as well as all former presidents.
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