185 grain .45ACP CorBon DPX shot from a 3.5" Detonics 1911 penetrated 14" of ballistic gelatin after passing through the 4 layers of denim material. Its 6 petals folded back perfectly. The same round successfully penetrated two layers of 16 gauge steel, collapsing inward and still penetrated 6-9" of the denim/gelatin.
230 grain .45ACP Gold Dot fired from a 4" G21 bounced off the first layer of steel, as did 230 grain FMJ fired from the 3.5" 1911.
150 grain .40 S&W CorBon JHP shot from a G23 penetrated 14" of ballistic
gelatin and denim, mushrooming perfectly.
140 grain .40 S&W CorBon DPX shot from a G23 penetrated 13" of ballistic gelatin and denim, its 6 petals folding back perfectly. The same round also easily penetrated the two layers of 16 gauge steel, then 6-9" into the denim and gelatin after its cavity also caved inward.
115 grain 9mm CorBon DPX performed as did its counterpart in .40 and .45 in both denim-covered gelatin and after penetrating two layers of steel.
My impressions are as follows:
The DPX round gives both excellent expansion and penetration in ballistic
gelatin and also has a remarkable ability to penetrate obstacles that defeat other bullet styles such as bonded bullets (Gold Dot) and even FMJ Hardball.
The performance of the .45ACP DPX when shot from the short 3.5"barreled Detonics 1911 was nothing short of astonishing. This round has become my new carry round in this caliber.
DPX would also make an excellent carry round in .40 S&W and 9mm as well, although I am not in as much a rush to replace my CorBon 150 JHP .40 S&W just yet.
Given the penetration performance of DPX through layers of steel and the fact that Gold Dot and Hardball bounced off the first layer during the same test, we may have to reconsider our views to include a brainshot (skull) with this ammunition as penetration to the cranial vault is a distinct possibility.