Gunner’s Journal

The 1911 Worlds Finest Handgun!

Posts Tagged ‘Cor-Bon’

Cor-Bon DPX

Posted by Gunner on November 3, 2008

   I’ve always liked innovative  people and the companies they run. Cor-Bon certainly is one of those companies. I’ve used a lot of Cor-Bon ammo over the years and now there is even more reason to with the companies DPX ammo. One thing is sure they make a type of ammo for just about anyone and fits every nitch there is whether it’s hunting or self defense.
   A couple of weeks ago I bought one of the German police Sig P6 pistols. While they were running the paperwork through I started looking at the ammo that was available in 9mm. My eyes caught the DPX box so I started reading the velocity of this 115 grn round. At 1295 fps it’s a screamer as are most Cor-Bon loads. What piqued my interest when I opened the box was the huge cavity hollowpoint. I’ve never seen a hollowpoint that large or deep. Combine that speed with the solid copper Barnes bullet and the large cavity and you have potential for a very effective defense or duty round.
   I did read an article on this round where they took two layers of shirt material one being a heavy wool and the other a standard cotton type. This was layered under a heavy piece of jacket leather with ballistic gelatin backing. The goal has been to achieve 12 inches of penetration in 10% ballistic gelatin. In this test they penetration was right at 12 inches with 100% weight retention and full expansion.
  My test was with water. I placed four 2 liter bottles of water back to back with a backing of old leather behind the first two bottles and behind the last two bottles just in case it penetrated that far. Gelatin is more realistic but water is a valid medium to use and yields similar results as far as expansion. With some calibers the round expands into four petals with the 9mm there are six.
  I setup with a Hi Power and the Sig P6. I proned out and fired first with the P6 which has a 3.9 inch barrel while the Hi Power has a slightly longer barrel. The results were pretty equal in spite of the barrel length. The bullet expanded very well and stopped after penetrating two of the bottles, the leather and stopped in the third bottle after making a small dent in the back of the third. I set everything up again and fired the Hi Power. This round went through two of the bottles, the leather and the third bottle then dropped to the ground after the third bottle. Certainly very similar results. I repeated this four times with the same results which indicates to me quality consistent loading. In other test I’ve had more deviations in velocity and penetration. All rounds fully expanded and retained 100% bullet weight. Expansion was .60! Being a one piece bullet it also has greater potential for penetrating glass, car bodies etc for those in law enforcement. The petals all folded out just a bit more than 90 degrees to the bullet body. The edges of the petals are sharp and are far enough apart to not clog when passing through most any material. Kinda like a little buzz saw:-) In fact I cut my finger a little handling one. There are also small serrations inside the bullet cavity to ensure expansion. I have a feeling that in a more robust material the petals would most likely open further curling back towards the body of the bullet.
   On to particulars. The DPX stands for “Deep Penetrating X” referring to the Barnes homogeneous copper bullet. The original round had four petals as I mentioned earlier looking like an”X” hence the name. I guess you could call this 9mm a hex bullet 🙂 Overall length of this 9mm is 1.12″ which is somewhat longer than most but due to the bullet shape it feeds like a charm in everything I fired it in. Standard deviation was 16 from the Sig which is pretty darn good in my view. This Cor-Bon is more accurate then I am capable of shooting and is more than accurate enough for any defensive situation. Recoil is not bad considering the velocity.

The cost of Cor-Bon ammo has always been a bit higher than other popular brands but then how much is your life worth! To sum things up it’s my belief this is the best round to come around in a long time. Time and study of actual shootings with this Cor-Bon offering will prove it to be effective enough that police departments will adopt it. Velocity, reliable expansion and penetration are the criteria by which ammo is judged. The DPX passes the test and then some. I believe in it enough after doing these test that it’s now my carry round of choice.

An Opinion on DPX ammo by John Farnham

Pistol Bullet Performance:

The last time we did a bullet performance test was during a course in PA early last year. At that time, friend and colleague, Mike Shovelfrom Cor- Bon brought out huge blocks of ballistic gelatin, and we shot them with a variety of commercially-available, high-performance pistol ammunition. We required each bullet to first penetrate four layers of denim before entering the gelatin. At that time, we discovered that denim retarded and frustrated the expansion of a number of conventional, hollow-point bullets. In bare gelatin, most expanded just fine, but the denim barrier presented a problem for all but a few.
Last weekend, again in PA, Mike joined us once more for an Advanced Defensive Pistol Course, The gelatin tests continued:Many commented last time that they wondered what effect a heavy,leather jacket would have on pistol-bullet performance and penetration.So, this time we required each bullet to penetrate a leather jacket AND four layers of denim before entering the gelatin. Each student subjected his own, carry ammunition to the test. Here is what we found:The combination of leather and denim frustrated most conventional,hollow-points. Most traversed the gelatin with badly-compromised expansion . Some did not expand at all. Even Cor-Bon’s vaunted PowerBall (45ACP, out of my Detonics) did not do well in this test. I was surprised, as few rounds will out-expand PowerBall, but the layers of clothing, combined with the Detonics’ short barrel, conspired to thwart performance.The one round that expanded consistently and completely, despite the leather and denim barrier, in all calibers, was Cor-Bon’s DPX! DPX, in 40S &W, 45ACP, 357SIG, 38Super, and 45AutoRim, were all unimpressed by the leather and denim. Even 380Auto DPX, out of my little Kel-Tec,was immune. It expanded symmetrically and completely, penetrating nine inches of gelatin, after penetrating the clothing.I am more persuaded than ever that DPX provides superior performance in the widest spectrum of circumstances, consistently outperforming any other bullet of which I am aware.



Update on a .454 caliber DPX

This is some additional info on the DPX given to me by Justin Cherington who shoots the DPX with the same opinion I have on this fine round from Cor-Bon.
“Average FPS was 1,580.2. Average expansion came out to .756″ and of course I have always seen 100% weight retention. In blocks of packed wet newspaper the average penetration was 16 inches with full expansion/damage starting at 3″. From what I have seen they penetrate about the same as the heavier 300 grain Hornady XTP if velocity is the same however they only averaged 87% bullet weight retention and expanded to .749 so the barnes has them beat! ”

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Sig Sauer P6

Posted by Gunner on October 14, 2008

Sig P6 German Polizei Import

Photo Courtesy of Hi Powers and Handguns

As many of you know the German Police or Polizei have switched to the H&K line of handguns. All of the old Sig P6’s, or as we know them here the Sig 225, have been imported by Century International for sale in the USA. Conditions on these guns varies from good to very good. Most have not been shot very much and most wear is from holster carry. Of course this is true whether it’s an American trade in or a German trade in. You can certainly get a fantastic bargain on this particular pistol. The Sig P6 is imported for sale in the standard blue Sig case with two magazines supplied. Most dealers who carry these fine pistols sell out of them as fast as they get them in. It’s no wonder! Where else can you purchase Sig quality for around $300 to $350! This model Sig is essentially a Sig 226 in compact form using a single stack mag configuration with the mag holding eight rounds of 9mm. I owned the American version P225 back in the mid 1980’s and found it to be a very fine pistol with outstanding accuracy. It also is thinner than most compact pistols such as the Glock and conceals very well. I know many shooters feel that you should at least have 13 or more rounds of 9mm to be considered well armed. I take issue with this view. I feel that if the first mag doesn’t get you out of trouble and the situation resolved your are most likely in deep trouble!

Sig With Cor-Bon DPX Ammo

I hadn’t seen any of these pistols in any of the local gunshops until today. Most have been mail order only. I stopped at a gunshop on the way home just to look around for a few minutes and noticed what was obviously a trade in P6. They had about a dozen of these a week or so ago and were down to only three left. I asked to see all three so I could compare condition, trigger pull etc and pick the best of the group. This particular example showed very little holster wear and from the barrel condition had been shot very little. As is common with most Sigs the trigger pull is a bit heavy at first and eases up as the trigger comes back. This one had a bit better than average trigger and was very tight all around again indicating very little use. It was marked “Made in Germany” with “P6” on the opposite side. The price on this one was $350. That is one heck of a deal for any Sig! If you can’t find one at a local dealer the place to mail order one to be sent to your FFL is Centerfire Systems. You do have to keep checking with them often since they sell out as fast as they come in. Here is the link directly to the Sig .
The P6 is a comfortable pistol to carry at a shade over 28oz. with a 3.9 inch barrel. Any holster that fits a Sig 226 will fit this pistol. A great holster would be the Galco Yaqui Slide for a 226. I’m sure if you contact Erik Little at Rafter L Gunleather he can make a holster for you. This man can really make a quality holster in fact the best there is available anywhere!

On the way home is a public range so after a quick stop at Wal-Mart for some white box 9mm I stopped and fired about 50 rounds. It shoots just as well as I remember. Having shot the 1911 so much it will take a bit of time to become accustomed to the Sig trigger again but that’s really no big deal. I used a shooting C target in the 5 inch size. With other shooters on the line I couldn’t move into my usual range evaluation distances so all rounds were from the 25 yard line. Even with my struggling a bit to get used to the trigger again and people shooting AR’s on both sides of me making me dodge brass all rounds went into that 5 inch target no problem at all. In fact three rounds went right through the red bullseye:-) These are just very accurate pistols period and always have been regardless of model or frame size. I’ll shoot some evaluation rounds when I get an opportunity and post the results here. This pistol is a real bargain and worth looking for one especially at these prices.
I did pick some fresh carry ammo that I have heard nothing but good about. It’s the Cor-Bon DPX which uses the Barnes solid copper bullet with a very deep hollowpoint. This is a 115 grn. +P round at 1250 fps and 399 ft/lbs of energy. In testing this round retains 100% of it weight and expands to twice the bullets original size. It also expands every time according to those who have done extensive testing. They have taken this round and fired it into two layers of clothing and a leather jacket with complete penetration and full expansion in the ballistic media behind the clothing materials. They have also tested it against auto glass and doors and had complete penetration on these materials with full expansion coming out the other side and still retained almost 100% bullet weight. That’s pretty amazing but Barnes is known for making very effective bullets and most folks know that Cor-Bon is usually on the cutting edge of ammo design. I did some measuring which is rather revealing. The cavity of the hollowpint is very deep at 3/8th of an inch with the mouth of the cavity at 1/4 inch wide! That is one mean looking round looking at it head on. Several law enforcement agencies have gone to this round with very effective real world one shot stops in 9mm and 40 caliber. This may very well be my carry load in all calibers if the results continue as time goes on and more police shooting results come in. Between the solid copper bullet and high speed of the round I would expect no less. One other note- there have been no recorded instances of over penetration in real world shootings.

Cor-Bon DPX “Deep Penetrating”

Hopefully I’ll be able to post some additional evaluations in the next week or so and get them posted. Bottom line is if you can acquire one of these Sigs it’s a real bargain you won’t be sorry you purchased!
One other thing. I have to apologize for the poor picture quality this time. I had to use the picture capability of our video camera which doesn’t take the best pictures.

Safe shooting and as always any questions or comments are welcome.

Update 10/19/08

I went to the range today to shoot my 200th round of ammo through this fine little gun. The picture above was fired at 10 yards. I drew and fired and fast as I could realign the sights. Total of eight rounds with some going into the same hole. I mentioned how accurate these pistols are as are all Sigs I’ve ever shot and I’ve shot about everyone they make except for the latest P250. The ammo was the Cor-Bon DPX 115 Grn.+P with the Barnes solid copper bullet mentioned above. You can get a good feel for the group size by comparing it to the magazine size. I have shot Remington 115 grn, Cor-Bon, Winchester, CCI and Remington 124 grain and finally Hornady TAP. All fed without a hitch and honestly I expected nothing else. Since the early 1980’s when I shot my first Sig 220 European I’ve never had a malfunction and that’s saying a lot. It’s the only brand I’ve ever shot that has never malfunctioned!
I do intend to replace the trigger spring with a lighter weight Wolff spring as I did on my H&K USP Compact. It should lighten the double action trigger pull and still provide reliable ignition. I’ll let everyone know how it works when I make the change. Replacement is simple by removing the grips which exposes the spring. Replacement should take maybe 10 minutes if that.

Update 10/20/08

This target is from 10 yards to 25 yards firing as you would practice for a critical situation. In other words pretty fast. There were a total of 50 rounds fired using Winchester white box.It’s unique for me but with the first long double action trigger pull I usually hit where I aim. That just a Sig and the way I shoot I suppose. The rounds that are a little off are single action shots from 25 yards. They are still in the the 8 inch target though so I’m pretty pleased. No malfunctions as usual even when I mixed various brand hollowpoints in one magazine.
Thanks to all for reading the blog!

The Sig P6 Notched Hammer

Many people have been very curious about why these pistols have a notched hammer myself included. I spent a great deal of time searching the internet looking for photos of Police carrying the Sig. I found a grand total of two. Between the two photos it appears there is a piece of material that attaches to the notch in the hammer then to the trigger guard or holster itself. It appears that maybe this is so that if the officer fires his weapon the material breaks. Or if the weapon is drawn the material breaks. I suppose this is one way of keeping track of an officers gun handling. The only problem is if that is indeed the case the material would have to be very flimsy to not interfere with drawing and firing unless it is attached to the holster.. Accidental breakage would seem to me to be very easy but then the holster in one picture has a flap. The flap was open in the picture. I tend to lean toward the weapon being attached to the holster. If anyone has information to the contrary please let me know.

Sig P6 Grips from Marschal Grips at

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