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Things moving that fast tent to fragment when they tumble. The reason it penetrates armor is just like the reason ss109 penetrates armor. There is a steel penetrator in the tip that causes the rest of the bullet to go through. However, when the bullet hits tissue it becomes unstable and tumbles. The tumbleing can cause fragmenting.
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Except that in scientific testing in properly calibrated ordinance gelatin, the 5.7 and .22 mag make nearly identical wounds. |
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DmL5,
If you understood wound ballistics, you would laugh at the picture you posted. The gel block contains no calibration bb. You cannot extrapolate from 20% gelatin to 10% gelatin. SS190 produces virtually identical crush cavity volume and penetration as does a .22 magnum round. But you don't have to take my word for it. The world's top two terminal ballistics experts, Dr. Fackler and Dr. Roberts, have done numerous tests that show this. I know that you are aware of this, as you got slapped down hard over on Tactical Forums when you tried to argue this point. Up next from DmL5: His "everyone ever shot with the 5.7 has died." |
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Yes yes that's all very interesting, but how does it compare to the .30 cal carbine round when it comes to terminal efects?
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Dr. Gary K. Roberts on the .30 Carbine:
And what he says about the 5.7:
Both penetrate soft armor, but the .30 carbine (with proper ammo) offers far better terminal ballistics. |
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PAEBR -
Funny how you state that that gel picture was uncalibrated, because when this discussion came up awhile ago you claimed the opposite. Make up your mind please. As for the penetration, Sandy Wall of Houston PD is the one that I got the avg. penetration depth from. Please provide an actual figure from Dr Roberts or anyone, that proves otherwise. You aren't being very articulate. You claim that the round is a .22 magnum, I claim it is not. However, I'm the only one to show any evidence proving my point. Did you look at the picture of the bullet length? You're claiming that a .22 WMR out of a 10" barrel will get an average of 12.25 inches penetration despite creating that sort of wound channel. Please give me actual proof. Doc Roberts never gives any figures to show the penetration depth or wound channel to be lacking, let alone a picture of the round in gelatin. He's basically asking us to take his word that the penetration is insufficient. Something we cannot do when we know from other sources that the actual figure is 12.25 inches. In fact, you yourself even acknowledged that that was the correct depth last time this came up. And it's not very significant that I was "slapped down" at Tactical Forums because that is the home of Dr Roberts and they are out to protect their own reputation. Don't you think they would "slap me down" if my comments went against their reputation? That thread contained many false claims and you are perfectly aware of it. They claimed things such as "Sandy Wall of HPD works for FN" and "the US Secret Service only use the P90 for specific missions". Awhile later and even you acknowledge those claims are false. But it's too late, the discussion on that site is over and locked for good. Maybe that's why I was "slapped down". As you continue to bring up my "being slapped down" at TF, I begin to wonder if maybe you are one of the TF members that participated in that thread. BDUser maybe? Tell me honestly. -DmL |
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DmL5
I never participated in that thread. I have only posted a handful of times on TF. Please explain for everyone your qualifications in the field of terminal ballisitics. We can then post Dr. Fackler's and Dr. Roberts' and see how they stack up. And BTW, Dr. Fackler has no association with TF, and he also got the same results for the 5.7 as Dr. Roberts. Perhaps it's because they use scientifically replicable experimental methods? Now that I answered your question honestly, you should honestly tell us if you are even old enough to buy a gun. |
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While bullets that work well in gelitan may work ok in a human.....to say that a gel block simulates anything other than a gel block is stretching it a bit(it is ment to be an approx of mussle tissue). Humans lack any calibration, they have a multitude of consistancies,voids,fluid pockets, and bones all of which will cause a bullet to act completely different than hitting a dense consistant block of gel.....add to that physical condition,state of agitation,determination, drugs on board ect. all factors that also determine how fast a fight is stopped....cannot be simulated in a gel block, and could not be consistantly replicated even if you placed 300 peeved humans in a test fixture and shot them. While the gel blocks can be made consistant...the real human or animal target of a self defense bullet are never going to be.
But on a side note..as gelitan is ment to simulate mussle tissue, without all the other stuff a human is made of, a 12in block of gel at that rate could only somewhat simulate having the dumbest assistant in the world stand sideways while clenching his butt mussles while you sent a round through both the cheeks of his butt...... while gelitan,soap blocks,"ballistic clay"and mathimatics are all a help......they fall way short of the do all end all answer. |
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DmL5 just pimps the 5.7 round. |
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I see it's back to the ad hominem behavior PAEBR. I post, you post, I post, you post, I finally corner you in some way or another (you dodged pretty much my entire post), and since you eventually cannot hold your ground in the argument, it always turns to this. YOUR level of maturity is in question. I guess I'm done with you unless you have something new to contribute.
-DmL |
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DmL5
Dr. Roberts found a bit over 12 inches of penetration from the 5.7 round. You will note the .30 caliber got significiantly deeper penetration, and it also expanded to create a crush cavity of over twice the volume of the 5.7. .22 magnum also provides a bit over 12 inches of average penetration in testing. Interestingly, Shawn Dodson got an average of 12 inches of penetration from 32 gr. CCI Stinger .22 lr fired from a Beretta M21A handgun with a 2-1/2 inch barrel. All three .22 caliber rounds: .22lr, .22 magnum, and 5.7 have very similar permanent crush cavity volumes. The wound channel that counts is the permanent crush cavity. The much larger temporary stretch cavity has very little wounding ability. You seem to be hung up on it. Terminal Ballistics experts are not. My asking for your credentials on the topic is not an ad hominem attack. You are making claims which are in conflict with the top experts in the field. You need to post your qualifications so that others can decide who's conclusions might be more valid. Dr. Roberts' and Fackler's results have been replicated numerous times by other experts such as Shawn Dodson, David DiFabio, and FBI, etc. Sorry I cannot link to more in-depth studies of the 5.7, but the best ones are in the IWBA Journal, or from the FBI, neither of which is available online. You could go to a research library and read some yourself, but apparently only "facts" readily available on the errornet count for some. |
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Thank you!
The comparison is between the 5.7x28 and the .22 WMR, not the .30 caliber. I never made any comment on what I believed about the two when compared.
Out of what barrel length, and what type of bullet is this and if it is a hollow point, how much expansion did it get? Regardless, once the bullet is getting at least 12 inches penetration, an increase in penetration really isn't very significant.
With zero expansion, correct?
Please tell me why I seem to be hung up on the TC because I have never mentioned it in this thread or any that I can think of off the top of my head.
Not at all. I'm arguing with you, not Dr Roberts or Dr Fackler, so I need no qualifications in the study of terminal ballistics if you have none yourself. You are also arguing against the opinions of dozens of agencies that thoroughly tested the weapon before adoption and are trusting their lives to it on a daily basis. But unless you are arguing with them personally, your credentials don't need to be "stacked up" to each other. Thanks again for giving me something real to work with. -DmL |
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But your ARE arguing with them. You have stated that the 5.7 offers much better terminal ballistics than a .22 magnum. Both of these experts in the field have tested both rounds, and found similar terminal performance, i.e. similar penetration depth and permanent crush cavity volume. I have not made those statements, they have. For example, you stated:
As for the dozens of agencies that adopted the 5.7: They may have reason beyond terminal effects. Neither you nor I know the answer to that, and you certainly won't find it on the errornet. |
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I'm arguing with you personally. It's true that I'm arguing with them as well, but distantly. Their credentials don't count as yours, even if you hold the same views.
Out of equal barrel lengths, as in 10 inches?
But YOU are the one relaying them to me. Therefore you are only able to boast to me about someone else's credentials. That doesn't give you nearly as much power to argue with, especially when I can cite the credentials of others that although possibly are not as experienced in the area of terminal ballistics, have had much more experience with the weapon.
That quote is shaky at best because your .22 LR example was certainly invalid. The .22 LR only gets similar penetration to the 5.7x28 with a straight-through wound. If the 5.7x28 was to make the same straight through wound channel as the .22 LR bullet that you cited, penetration would far exceed 12 inches. The 5.7 bullet dragging severely during yaw is what limits it to 12 inches.
If the terminal effects weren't significant to the use they intended for the weapon, they wouldn't have done gelatin testing beforehand as they did. And Dr Roberts made the claim that "adoption of this weapon system is a way to ensure mission failure". He didn't merely claim that the weapon produced inadequate terminal effects, he claimed that the weapon would "ensure mission failure". So tell me, out of the dozens of agencies using the weapon over the past decade, why have accounts only surfaced of the weapon performing, and none of the weapon "ensuring mission failure"? And why do all these agencies continue to use it on a daily basis? -DmL |
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DmL5:
Crush cavity volume is crush cavity volume. If you do not understand that, there is no use in discussing the issue further. If you have an issue with Dr. Roberts' conclusions, feel free to refute them with ballistic tests that found significantly higher crush cavity volume for 5.7 wounds over .22 magnum wounds. As for this thread, I have already posted the terminal ballistics test information in which Dr. Roberts found the .30 Carbine (with proper ammo) to have much better terminal ballistics than the 5.7. I believe it answered AyeGuy's question. |
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Quit posting facts PAEBR! |
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Correct, I never said otherwise. A yawing projectile having a length of .850-inches and traveling at significantly higher velocity is going to penetrate deeper than the .22 magnum despite the drag resulting from bullet yaw. As you stated, the .22 WMR will get 12 inches, but the barrel length was never specified nor how much the bullet expanded.
You seem to have acknowledged that his statement about "at best a .22 LR" is false, so what is to keep us from coming to the same conclusion on the .22 WMR statement? He never presented any data or figures to validate either claim, nor did he even specify the barrel length of this ".22 magnum". Basically, he seems to have just said it off the top of his head (without any comparitive research on the differences between the two) as a way to say the 5.7x28 is an inadequate cartridge. -DmL |
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Did your even read the results I posted from Shawn Dodson's test? The one that got 12 inches of penetration and equal crush cavity as the 5.7 from a .22 lr from a 2.5 inch barrel? Dr. Roberts' statement was not false in that regard either. I love how you are accusing Dr. Roberts of making false statements without actually having ANY evidence to support your contention. Once again: Please let us know of your credentials so that others can make an informed judegement about whether to believe you or Dr. Roberts. |
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View table 3 in this LINK. It states 12 inches penetration but does not claim any fragmentation OR expansion.
-DmL |
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Which proves WHAT? The 5.7 round neither fragments not expands either. Similar crush cavity volume + Similar penetration = similar wounding potential. Get it. All your link proves is that the .22 long rifle gives similar terminal performance as the 5.7. Thanks you for proving my point. |
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BWAAAAAAAAAAAAAAAAAAAAAAAAAHHHHHHAAAAAHAAAAA! |
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Just put the damn bullet where it needs to be and all of them will work just fine.
Personally I really like the .30 carbine and the .223 rounds. I would feel completely comfortable with either in any sort of CQB situation, I would prefer the .223 in longer range scenarios but this is just my opinion and I have nothing to back it up except how I feel about each round. |
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I put 100 rnds of 30 Carbine into a paper target yesterday, but it remained standing. I am a big fan of heavier bullets. The 30 Carbine fits my bill. I am working on a |
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Well, with the PS-90 now coming onto the market, we can expect to see more reports on how the 5.7 performs.
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I would have to say if you try to use the 5.7 against the new model of cylon toasters,youre fracked!
In all seriousness,the episode of battlestar galactica were the cylons had boarded,and apollo shot the toaster about 6 times at close range with his 5.7 pistol and couldnt stop it,pretty much puts to rest the debate about the stopping power of the 5.7 |
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+1 shoulda used .30 Carbine |
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I wouldnt want to be shot with either. Both will do the job. I think there is so many other things that will effect stopping power other than the differences between these two bullets. It has proven they both kill now but them where they count.
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Doesn't this argument come up every couple months, and doesn't DmL always lose??
Ballistic gelatin offers only theoretical terminal performance. The true results can only be recognized through documented shootings. As of this point, there are very few documented shootings that involve only the 5.7 round. Many of the shootings involve multiple hits from multiple rounds, and are inconclusive. Basically, the verdict is still out on the 5.7 round as a manstopper. Anyone arguing otherwise is arguing opinion, not fact. Oh, and in all of the P90 5.7 shootings (total of about 10-12), none of the individuals were hit with the ammo currently available to US civilians. So, we have no idea how the current civvie ammo will perform out of any 5.7 gun (specifically the FiveSeven handgun, which averages actual chrono'd speeds just over 2000fps). |
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-DmL |
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There was an embisy shooting as well from what I read but cant find a link to the shooting. Death was apparently caused by one or two shots through body armor by the 5.7 round.
Also the death in the tx shooting was supposidly revealed by the medical examiner as cause by the 5.7 not the 223. |
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Jason280 and PAEBR332 are both aware of those shootings and the others. It's a daed horse. Neither side has anything new (positive or negative) to bring to the argument for now.
-DmL |
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Another thread where there is 2 or 3 people that cant get past their big heavy 100 year old tools and understand there is better stuff out there. Dont think anyone would just pull a nuetered round out of their pants and market it to military and law enforcement with the current tempurature of effective and noneffective rounds.
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---and---
---and---
You will see this a lot from the 5.7 proponents. No concrete facts, just a lot of speculation.
But can you provide any actual shootings to support the effectiveness of the rounds currently available for civilians? Remember, gelatin is not conclusive proof, no matter how bad you want it to be.
This is hardly the case. Unlike you, we simply don't jump on the bandwagon of the "latest/greatest" craze. We base our decisions on facts, hard data, and conclusive results. Let us know when you have some. |
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-DmL |
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No I thought the same thing when I first read the stuff "wholy 22magnum" then I looked at the whole picture. The velocities and bullets are different. The people that are arguing the point that the thing doesnt work probably never have had or ever will need to use it so that point is null too.
I would love to see the test data that the USSS has on their p90s as well as many other spec ops units that are using it. However, a lot of the information is not public domain and it has nothing to due with scientific fact but actual use of the caliber. After the 10mm fiasco that the FBI went through after the original 9mm non-stopping horror stories it is very unlikely that any well funded govt agency would select a caliber without all the facts. Just because you dont rank high enough to see the balistics that you will never need to know doesnt make something worthless. Like I said before this caliber has been out for 10 years and the majority of the people here have not mearly jumped on the band wagon with something. |
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Please explain.
You wasted all that time preparing a response? It would have been a lot easier to simply say "No, we cannot provide that information, as we have no evidence to back up our theoretical and unsubstantiated claims". We are looking for facts, not your speculation. I see you have a difficult time separating the two.
How do you think "scientific fact" is determined (if not by actual use)?
Majority of what people?? Besides, no one is calling the round worthless. We are simply skeptical. At this point, the round is unproven and on this board, highly overrated. Couple that with the fact the FiveSeven is the only gun currently available to civilians, not to mention the ammo specifically designed for the 5.7 isn't available to civvies, only leads to more uncertainty. If you can get around these facts, please do so. |
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-DmL |
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You're only going in circles, so please try again.
Are the identical, or are they different? Also, has the gun you pictured began shipping to dealers yet? |
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cup of saltwater and it would have shorted out |
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-DmL |
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Oh, I get it, you're playing dumb now. Too bad its not going to work here, we all ready know your tactics. It was a nice try though. Besides, you know exactly what I am talking about because the information came off the links YOU posted the last time we discussed this. Please don't tell me you can post the information, but know nothing about it...
Isn't defeating body armor one of the primary roles of the 5.7 round? I mean, isn't that what FN was after when the round was developed?
Are you suggesting gelatin testing determines unequivicolly the effectiveness a round will have on a human subject? News flash, news flash. Gelatin only approximates human tissue, and does not duplicate the inconsistencies and variables found in the human body. You know, differences such as various tissues, bones, muscles, etc. Ever see any hollow organs in gelatin? How about a rib cage? Your information is so flawed its unreal, and the fact that you follow it blindly defies logic. I know you hate to admit it, but you cannot win this argument without providing conclusive and fact-based information. All you have is speculation, theory, and opinion (at least you have something). |
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-DmL |
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Wow, that's the biggest circle you've made yet! I have to admit, I'm a little impressed...
The info you seek is in your own links. I'm sure you have them stored, and you don't need me to tell you what you all ready know to be true. I see you are taking the same route you did the last time this came up. You're called on your data, then you start changing the focus. Next comes the back peddling, avoiding the topic, which then leads to you going in circles. You know, quoting gelatin, supposed shootings, and so on. Except this time, you were smart enough to leave the links out. I guess you got called on them one too many times, and figured facts weren't helping your argument. With luck, this topic will also get locked and you can start your banter again in another few months. Maybe then you will actually have hard data (but I doubt it). But, I will go ahead and tell you, no one will buy it then, either... |
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-DmL |
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not picking sides, i havent come to a conclusion onthe 5.7 yet, but you are making yourself look like an idiot, you really need some comprehension skills if you dont realize this. |
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