Below is a link to the Bersa gun message board where people have done ammo tests using water jugs, with denim sometimes placed in front.
The tests are not as sophisticated as the ones linked to in the messages above but are still noteworthy. It's important to pay attention to the length of the barrel used in a test because it affects bullet velocity and expansion.
The following 380 ACP ammo test is important enough to warrant its own post here. The test is of the new Lehigh Defense XP (Xtreme Penetrator) self-defense round, which has a unique and innovative bullet design.
I would not extrapolate the results of the 380 test to other calibers of the XP round offered by Lehigh. For example, the Lehigh 9MM XP round is apparently an over-penetrating round based on data for that round on Lehigh's website.
Here is an interesting article and information about Polycase's ARX round available in pistol calibers. The design of their bullet reminds me of Lehigh Defense's XP (Xtreme Penetrator) self defense round mentioned in my previous post. The Polycase offering is very different from copper jacketed lead core bullets but nevertheless we must appreciate new innovation in ammo since it could lead to something much better a few years down the road.
Speer has developed their new Gold Dot G2, a bonded 147 grain standard pressure 9MM, presumably in the hopes of winning a new contract to supply the FBI. The G2 might still be under development with test rounds circulating for law enforcement evaluation.
The G2's hollow point is filled with an elastomer to improve its reliability of expansion when fired through barriers such as wall board. The elastomer does not extend beyond the nose of the bullet like the Hornady FTX bullet does. There is also a change to the design of the cuts in the hollow point.
As a follow-up to my previous post, here is a defining ballistic test (with excellent commentary) of the Gold Dot G2 when fired out of 3", 4" and 6" barrels. Wow, total fail out of 3" and 4" barrels. https://www.youtube.com/watch?v=CeVtwmHeRZQ#t=34]
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