I just picked up an FIE titan .25 yesterday (which looks like something an unsuccessful pimp would carry, with it's capgun quality chrome finish and all) and after comparing the size of the ammo to other pocket pistol calibers, I don't see why it's so weak. The case is the same length as .22lr, and just a little bit shorter than a .32, yet it has only about half the knockdown of either of those calibers. I loaded up 3 rounds and fired it into the ground in our backyard, and it seemed pretty snappy, but when I tried to dig up the slugs to see how far they penetrated into the dirt, all I found was small bullet fragments a few inches down. This was 50gr FMJ too, which inspires even less confidence. This isn't something I plan on carrying...ever, but I was just curious why .25 is so far off a .32 and even weaker than the smaller cased .22lr? I also picked up a .22 jennings the other day, so now that I've got a very small collection of junk guns, I plan on doing some penetration tests with all of them to see just how crappy they really are, and I'll post some results. I know the chronograph results from my keltec .32 was enough to make me wish I had went with the .380 instead.