Cor-Bon 9mm Luger +P 115gr DPX in gel

[Tokarev]

Good afternoon!

Today I tried the Cor-Bon 115 grain DPX in organic gel. I fired 2 rounds through FBI spec heavy clothing and two rounds through laminated auto glass followed with a light clothing barrier.

Distances from the muzzle was 10 feet for gel and clothing and 10 feet from the windshield for the glass test. The block was placed 18 in behind the glass. Firearm used was a Ruger Officer's Model with a 3.6 in barrel.

First up, Chrono data:
1064
1085
1094
1077
1088
Average: 1081.60
StdDev: 11.59
Min: 1064
Max: 1094
Spread: 30
True MV: 1082.83

Only three bullets were caught. The first round through auto glass exited out the top of the block.

Note the slice visible in the top of the block that ends at close to 12 inches. This is the track from the first bullet through glass. A search of the immediate area to locate the bullet was unsuccessful.

The two bullets through clothing poked to just over a foot. The captured bullet through glass can be seen there at about 11.5 inches.
https://uploads.tapatalk-cdn.com/20180304/3499dbcd8d3b9148f89e5cd792198642.jpg

Here are the bullets fired through clothing. Note the auto glass bullet there at probably 11.5 inches.

https://uploads.tapatalk-cdn.com/20180304/1c8f8c304b82378718aeaf514ac8d562.jpghttps://uploads.tapatalk-cdn.com/20180304/b4083f6c8a00337adaa9d102671c8c5d.jpg

Recovered weights.

Auto glass first.

https://uploads.tapatalk-cdn.com/20180304/3ec676e6ab84286d0846fe70629657ee.jpg

Heavy clothing.

https://uploads.tapatalk-cdn.com/20180304/2063b1e727253a3990a1b296c75c0178.jpghttps://uploads.tapatalk-cdn.com/20180304/dfa185c907b15701834064509625bab6.jpg

Recovered diameters.

https://uploads.tapatalk-cdn.com/20180304/984c0ec6df3203f860fa2c308bc774bf.jpghttps://uploads.tapatalk-cdn.com/20180304/627f3681d19eaa15a931506cf15e1e10.jpghttps://uploads.tapatalk-cdn.com/20180304/02ebda3b9ec0f0df80d071f0a7a721b8.jpg

An overall of the three bullets.

https://uploads.tapatalk-cdn.com/20180304/69bf97ce2c5e5aee4613efe131af5fc2.jpg

As is probably expected given the recorded muzzle velocity, this is a mild load and was quite soft when fired from the little Ruger.

[5pins]

Not bad. I assume it was pretty soft shooting at such a low velocity.

[Tokarev]

Not bad. I assume it was pretty soft shooting at such a low velocity.Yep. Nice comfortable load in the little Ruger.

A similar load (all copper hollowpoint but made by Barnes) is the 115gr TAC XP from ASYM Precision. It is also a "+P" load but churns out muzzle velocities closer to 1,200 fps. It produces more recoil. But it also penetrated to 13" in clothing.

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[olstyn]

First up, Chrono data:

Average: 1081.60

Kind of surprising that a 115 gr +P load isn't faster. I'd be interested to see the results (both chrono and gel) if this test was repeated with guns with a longer barrels. Even with relatively fast-burning powder (VV N320), I've seen +40-50 FPS from as little as a half inch longer barrel. If Cor-Bon is using something slower than N320, the difference could be larger.

[Tokarev]

Here is an overall photo of the block sliced in half.

Note the bits of denim and clothing shed by the bullet. https://uploads.tapatalk-cdn.com/20180304/596039b395275633bcb9ad6effb09c99.jpg

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[Tokarev]

Auto glass is some amazing stuff. Four rounds through (two 9mm and two 38) and it is still a solid piece. https://uploads.tapatalk-cdn.com/20180304/5c1044ea564a6086011e5f294f223f52.jpg

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[ST911]

What's the lot# on the inside flap, and are there any additional marks or stamps on the package?

[Tokarev]

What's the lot# on the inside flap, and are there any additional marks or stamps on the package?Here you go. https://uploads.tapatalk-cdn.com/20180304/082dab4c473014b0b5339e2f6a50733c.jpg

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https://uploads.tapatalk-cdn.com/20180304/3518f59b31385b861645417520e00ada.jpg

[feudist]

Following your work avidly.

[Tokarev]

Following your work avidly.Thanks!

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[Tokarev]

Kind of surprising that a 115 gr +P load isn't faster. I'd be interested to see the results (both chrono and gel) if this test was repeated with guns with a longer barrels. Even with relatively fast-burning powder (VV N320), I've seen +40-50 FPS from as little as a half inch longer barrel. If Cor-Bon is using something slower than N320, the difference could be larger.5pins got pretty similar velocities with the Barnes 115gr stuff.

www.general-cartridge.com/blog/barnes-9mm-115gr-p-tac-xpd-in-clear-ballistics-gel

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[5pins]

Odd when you consider the both claim around 1200fps.

[Tokarev]

Odd when you consider the both claim around 1200fps.The ASYM load runs closer to 1200 fps but the firing pin strike is blown nearly clear out of the primer.

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[ST911]

Production date is during the transitional period, so hard telling if there are recent changes of note. Last bullet was their proprietary v3 DPX bullet, still a copper solid but not a Barnes. It's historically been the fastest and highest pressure of the type, and could be pretty barky. I have some velocity notes for a G26 in the ~1150-1200 range, and a windshield at ~18" penetration and about .4 recovered diameter. Even if now downloaded, those solids are long and present their own quirks in load development. More pressure doesn't always mean much more velocity, depending on what they're doing. Interesting...

[Tokarev]

I'm running out of FBI clothing as bought from Clear Ballistics so I took the fabric samples down to Joann's Fabrics and bought a yard of each material. The nice lady who helped me said they don't list fabric by "5.25 ounces per yard, 48 threads per inch" or "3.5 ounces per yard, 80 threads per inch" but she was able to get me what I wanted by feeling the stuff with her fingers. The only thing that was listed by ounce was the denim. I bought a yard of 11 ounce. This was the heaviest they had. The FBI spec calls for 14.4 ounce denim.

Hopefully these materials will be close enough as to not negatively influence my results. It would be easier, yet more challenging to the bullet, to just use four layers of denim. But I want to keep using something close to the FBI protocol since that seems to be the industry standard.

The lady at the fabric store asked me what I was wanting this stuff for. I guess I should have anticipated that and cooked up some sort of cover story. Being caught on the spot, I told her the truth and was waiting for her to be offended. Surprisingly, she seemed quite interested in hearing what I was doing. That was a nice surprise especially given all the bad press guns have been getting again.

[LOBO]

Looks like the DPX is a solid performer!

Thank you for this test and the others you have done. You do some really nice work with these tests.

[Tokarev]

Looks like the DPX is a solid performer!

Thank you for this test and the others you have done. You do some really nice work with these tests.Thanks.

I have a half a box of the DPX left. I should try it out of my P320 X5 with its 4.7" barrel.

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[lyodbraun]

Thanks.

I have a half a box of the DPX left. I should try it out of my P320 X5 with its 4.7" barrel.

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That'd be a good test to see

[Tokarev]

Today I tried the Cor-Bon in my SIG P320 X5. This pistol has a 5" barrel so I was curious to see what the longer tube did for overall performance.

Muzzle velocity is better--1150fps or so--from the full-size barrel but still quite a bit under the advertised 1250fps.

Penetration is better, too. Two bullets fired through heavy clothing gave 13.75 and 14.5" in gel.

Overall, probably not a bad load. It is billed as "+P" likely due to the chamber pressure rather than the velocity. As a result, the load is comfortable to shoot and would probably make a decent carry load.

What a quick way to blow about $25! But I enjoy it.

Bullets pulled from gel show 100% weight retention as was expected. https://uploads.tapatalk-cdn.com/20180312/2dd7caf1005a520fae9cf57fd360f35a.jpghttps://uploads.tapatalk-cdn.com/20180312/2a430a8ebefec3e9f27bee4bd4a86863.jpghttps://uploads.tapatalk-cdn.com/20180312/7beda5c17d2a6a1e8bb22d236e540470.jpg