So I was bored today, so I grabbed a bunch of gallon water jugs, a few guns, and headed out to the range. I wanted to test the 102gr GS and the 90gr Fed HS rounds through the 4 layer denim test with my p3at. This is the standard heavy clothing test. Performance in heavy clothing is a concern where I live(MA). I also brought my 642 loaded with DT's 125gr +p GD and my duty pistol, a Sig p229 dak in .357 sig, loaded with speer 125gr JHP. I lined up the 6 jugs all touching then folded over a pair of jeans so I had the 4 layers and drapped them over the first jug, not too loose, not too tight. I shot each shot from about 8 ft from the first jug. First up was the Keltec with the GS. I found it in the third jug. Only two petals of the brass jacket expanded, no expansion of the lead at all. I know this is tough test for a .380 round but I was a little disappointed as this my carry round for this gun. Which I carry a lot off duty and in my off hand pocket on duty as a last ditch bug. :'( The only other JHP I had in the .380 was the Fed HS JHP. Again I lined 6 jugs and covered it with 4 layers of denim and shot from about 8 feet. I found the round in the 5th jug with absolutely no expansion at all. I was not surprised by the lack of expansion with the denim with this particular round. I was surprised that it out penetrated the heavier GS. My other off duty/on duty bug gun I use quite frequently is my SW 642. I usually load it with DT's 125gr +p GD JHP. I have always liked this round as it is soft shooting compared to 158gr +p and according to DT it does about 12.75"pen .675" exp in denim covered ballastic gel. I though for sure I would be happy with its performance. Not so much. Penetration was great, found it in the fifth jug. When I saw that I was psyched. When I got it out, I was shocked. No expansion at all. You could reload this thing! This bullet is designed to expand down to 800fps. I know it going faster than that. The box and website claim 1075fps from a 1.875" barrel. I didn't think the denim would hurt this rounds performance so bad. DT must have posted tests from a 4" barrel. I'm going to try this round again at a later date before I ditch it for Speer GD or Corbon DPX or Hornady CD. Just for sh*ts and giggles I brought along my new duty gun, a Sig p229 DAK in .357 sig. We just switched from old SW .40's, the 4043. Man this gun is sweet. Just like the others, lined up six jugs covered the first in 4 layers of denim. BOOM! First two jugs were obliterated. ;D The performance was stellar as expected. Found it in the fifth jug, perfectly expanded. Expansion was .563". Very happy with this as my duty round. So, now I'm seriously considering the Hornady CD for the Keltec. I have seen a lot of other backyard tests with the GS were it usually comes up near the top. But I think to get good penetration, relative to this caliber, and consistent expansion in heavy clothed bad guys, I think the Hornady round is the way to go. I see no reason not to switch as cost is the same and it performs more consistently. I realize that this testing is about unscientific as unscientific gets. It was done to show how different rounds perform across the same test. And because it was fun.