Since converting my GLOCK 21 to 10mm, I’ve tested a few different types of ammo from it, but the requests just keep coming — everyone wants to see DoubleTap ammo tested in 10mm. The reason is simple — most major manufacturers are selling “watered-down” versions of 10mm ammo. A simple example is Federal’s Hydra Shok. The 10mm version is barely, scarcely any more powerful than the .40 S&W version. According to Federal’s own ratings, the .40 S&W Hydra Shok is rated at 1,000 fps. Their 10mm version is just 1,030 fps. That’s barely over 420 ft/lbs of energy — paltry for what the 10mm is capable of. “Full-power” 10mm loads should be delivering more on the order of about 650 ft/lbs or more . . .
Unfortunately, the major manufacturers like Speer, Federal, Hornady, Remington and Winchester just don’t offer full-power loads in 10mm. Or if they do, it’s with ancient bullet technology (yes, I’m talking about the Winchester SilverTip here). Wouldn’t it be nice if we could get a good, modern, full-power load with something like, oh, say, a Speer Gold Dot bullet?
That’s pretty much exactly what I’m reviewing in this video — the DoubleTap 165-grain Bonded JHP. It’s a basically full-power load (in my test it delivered about 640 ft/lbs of energy) and it uses a Speer Gold Dot as its bullet. I think. I mean, nowhere on the box, or on DoubleTap’s site, does it mention that the bullet is a Gold Dot, but — after testing hundreds of Gold Dots, I know how gold dots perform and what they look like, and I am 99.8% certain that the bullets that DoubleTap is using are Gold Dots (which are, of course, Bonded JHPs).
How did they work? About as you’d expect — phenomenally. The two bullets through the denim penetrated right to the sweet spot of 15″, expanded gigantically, and in all ways exhibited ideal performance for self-defense/personal protection use. In the bare gel, I fired two shots but only recovered one bullet (the other escaped out of the top of the block after penetrating about 14″). The bullet I was able to recover penetrated to 14.25″, and did expand.
It looked like it exhibited classic “overexpanding”, where the petals bend over so far that they actually look like they might be close to shearing off, and the bullet ends up looking like a jellyfish. I prefer how the denim bullets looked, but the bare bullet was still a large expanded hollowpoint that penetrated well, so I have no complaint — especially since people who pull bullets out of bodies for a living have said that generally, bullets from a body look like the bullets from denim-covered gel tests.
If that holds true in this case, I think these DoubleTap 165gr Gold Dot bullets would be a superb choice for defense against human attackers. I might not choose them for a woods gun where the firearm might reasonably be expected to be employed against a big cat or bear; for that situation you may prefer a hardcast bullet or perhaps a hunting bullet like the XTP. But for personal defense, this ammo is outstanding.