Not Buffman, but a nice test.
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My test is complete. I suppose I should work on the video. Motivation for some of these projects, goes into the dumps when the company who gets free advertising from the whole ordeal doesnât share/mention/interact with the contentâŚ
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The TL:DR of the CD 5.7 - I would ONLY recommend this for pistols. The blunted nose presents feeding problems (small handful malfunctions) in our PCC and PDW that donât utilize feedramps. The velocity is there, and so is accuracy. Expansion of the bullet happens even in the heavy clothing. However it took the 16" to penetrate my standard IIIA, vs the Vmax Black doing it from the 8". I honestly would take the Black Vmax or AAC Vmax over the CD.
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i absolutely love vmax
more futuristic technology, lots of science
Iâm hoping AAC releases a âSabre Black Tipâ 5.7. Different polymer mix I highly guess and maybe a slight powder change. Take the AAC 5.7 completely over the top.
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Trunk of the Mustang.
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This is an interesting video. Thanks for posting.
Iâve always (naively) assumed longer barrel length equates to higher muzzle velocity and therefore more penetration.
So what caused the bullet from the longer barrel to not penetrate as deep as the shorter barrel? Only thing I can come up with is it expanded more and maybe tumbled more???
The higher velocity/energy causes earlier and greater expansion of the bullet, which translates to more friction and front-face resistance. Thus less penetration.
If they were non-expanding bullets (high brinnel hard cast, fmj, monolithic copper or something), then generally higher velocity will mean more penetration. But when it expandsâŚ
Peace favor your sword,
Kirk
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Higher velocity can also cause JHP failures (jacket loss, overexpansion, and failure to expand) if it gets outside of the velocity window the round was designed for.
Makes me cringe everytime I see someone recommend a 9mm pcc with a long barrel.
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i absolutely recommend a 16â 9mm PCC, feels just like the carbine most of us are already used to but shoots much cheaper ammo. very accurate for being so inexpensive itâs impressive
If I want cheap and accurate with not great terminal performance I can run 22 long rifle.
Nothing you said addresses any of the deficiencies with hollow point rounds outpacing their recommended velocity.
You can solve it by using monolithic copper rounds, but at that point, youâre spending an awful lot of money to make it more practical. Once youâre spending that kind of money for the ammunition, the practicality in terms of cost really goes away and youâre just left with rounds that are heavier, lower range, and still less effective than a comparable rifle round or a decent 5.7 round.
i would rather get shot by a 22lr than 9mm lol, 9mm is powerfull and accuracy matters, if youâre using a short barrel why not just use a pistol instead?
Based on the gel test results and what you said, it seems the 5.7 CD was not designed for long barrels.
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Yeah, I donât think that it was, and it doesnât sound like it feeds particularly well in most of them either so.
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So weâve come to full circle on why 9mm PCCS are not great defensive options, lol.
Plink away. Theyâre plenty of fun.
Things change.
Well done, sir. I think it adds even more credibility to your testing methods in that you figured it out before they had a chance to change the labeling.