No doubt about it, in ballistic gelatin the .45 Auto has the edge, followed by the 9mm FMJ, with the 5.7mm bring up a distant third.
That poster cherry-picked loads to make it appear that way (and admitted it). The 9mm FMJ test he posted was also done by a different tester in
uncalibrated gelatin. We can make his comparison valid by using high quality 5.7x28mm ammunition alongside a comparable caliber (9x19mm):
The tests aren't quite to scale (the 9mm video is zoomed in much closer), but the tests were conducted in the same media by the same independent source (Brassfetcher).
Here's a quote from your first post on this thread:
All of the shootings listed above clearly indicate that the 5.7x28mm is at least as effective as the common pistol calibers. The hearsay on this caliber that appears on internet forums is always completely unsubstantiated and unverifiable; people have been recycling these stories for years now, and you still can't trace them to anything more credible than vague posts on an internet forum.
The vid tests I posted are data, hardly unsubstantiated, and definitely not hearsay. Your first posts on this thread puffed up the cartridge as being "...at least as effective as the common pistol calibers." - when in fact the video tests I posted above showed that it was comparable to a .22 LR with its worst loads, and maybe about like a 9mm FMJ with its best loads. When you take the common calibers with their best, premium loads, the difference is visible in favor of the bigger calibers, as others have already observed.
I own 3 AR's, including a .300 Blackout upper, so I am certainly not automatically opposed to new weapons or calibers, but I am also unlikely to face terrorists in body armor, and don't see the point of the FN pistol for me. Now as a carbine, it might well be a neat replacement to the old .22 Hornet in suitible applications, or just a fun project, but I have no illusions that it is the wave of the future.
