Well, I did get a box of free bullets anyway.Doesn't look like it would be all that effective; the vast majority of fragments only penetrate like 3-4 inches, and some bits of the jacket go on to penetrate up to 14 inches, but without leaving a particularly big permanent cavity.
Plus, with how wobbly that guy's gelatin block is, I'd question whether or not it is properly done and calibrated. It seems too soft and jiggly relative to other gelatin block shots I've seen.
Yeah, I'm going to use these for target practice.I would be concerned about barrier penetration in general as well as heavier clothing like denim. If you want light and past for the caliber I'd look at the Barnes copper offerings. I've shot and recovered many Barnes copper rifle bullets (270, 308, 30-06, 338, 35, and 450 Marlin) they retain 90+ % of original weight even after being shot into a tree stump at 100 yards. Impressive. The 10mm and 357 I've shot performed as well. I've never used them in 9mm 40 or 45ACP as I use HST's simply due to that is what I carried as LE and if I'm ever involved in a critical incident I have that to back me up.
Be leery of the untried and untrue. I'd need to see more before I trust it with my life.