Gun Forums banner

Corbon .45 Auto Rim 160-gr. DPX

1586 Views 4 Replies 3 Participants Last post by  Ben
A non-professional review by Stephen A. Camp of the newly released Corbon .45 Auto Rim 160-gr. DPX for .45 revolvers.

Stephen A. Camp @ said:
Hello. Today I was able to try this new addition to Corbon's DPX line of handgun ammunition. It utilizes a Barnes X-bullet, which is constructed from a copper alloy and contains no lead. DPX stands for Deep Pentrating Xbullet and these have been popular in rifle calibers for years. Unlike the rifle bullets, the Barnes X bullets used in the Corbon DPX ammunition expand via six equidistant petals rather than four.

The auto rim cartridge can be used in .45 ACP revolvers without the use of those pesky moon clips.

The three cartridges in the half-moon clip are .45 ACP. These can be a real pain to load with live ammunition and worse when removing fired cases. Several types of tools aid in the removal process. The AR ammo "operates" just like any other rimmed revolver round.

This is a standard pressure load that has a listed velocity of 1050 ft/sec. It appears to be the revolver-equivalent of the Corbon's 45 ACP "Compact Gun Load," which uses the same bullet and has the same listed velocity.

This ammunition was fired from the only .45 ACP revolver I own, a Smith & Wesson Model 625 w/5" bbl.

This revolver is not compact and not ideally suited for concealed carry, but it's what I had. I hope that the results can still be of use to folks having revolvers with shorter barrels.

This ammo proved accurate at 15 and 25 yards. Groups were fired using single-action, slow-fire, and from a seated position with my wrists braced. To make a long story short, this ammunition groups quite well from the test gun.

Not sighted in exactly right, we can still see that the load is capable of tight groups. These sort of groups are not likely under the conditions for which this ammunition was envisioned, but it's still nice to know that the ammunition is capable of better accuracy than we probably are under the stress of a life-or-death deadly force scenario. At 15 yards using the same POA, the 160-gr. DPX load hits approximately 2 1/4" lower than with standard velocity 230-gr. ball.

Based on 10 shots fired 10' from the chronograph screen, this ammunition yielded the following:

Average Velocity: 1108 ft/sec

Extreme Spread: 37

Std. Deviation: 12

Informal expansion testing was done in water and in super-saturated newsprint, which was soaked for 24 hours and drained 30 minutes before shooting.

From left to right: Corbon 160-gr. DPX fired into water. Winchester 230-gr. Ranger JHP fired into the soaked newsprint and a DPX fired into the same thing. Expansion was reliable and consistent. In the wetpack, both the Winchester and the DPX bullets penetrated approximately the same depths, a bit over 6". The Winchester 230-gr. Lawman JHP is considered an extremely "good" defense bullet and usually penetrates around 14" in 10% ballistic gelatin, which is a bit over the FBI suggested minimum of 12". Corbon's DPX is designed to penetrate at least 12" in 10% ballistic gelatin.

Felt recoil was less than with standard velocity ball to me and checking out the numbers based on both rounds' average velocities from this revolver, the DPX recoils with about 7% less "kick". Fired cases could literally be shaken from the cylinder so folks using smaller .45 ACP revolvers shouldn't have to be concerned with ammunition that might possibly put undue wear and stress on their handguns.

I am advised that the powder used is flash-retardant and of optimum burn rate for use with short barrels.

In short, I am very favorably impressed with this Corbon DPX load.

If interested, a more detailed report is here: 45 AR DPX Ammo Test.htm

For those interested in this ammunition or who have more questions, here is the link to Corbon's site:
* 45 AR DPX Ammo Test.htm

Additionally take a peek at his review of the Corbon .45 ACP "Compact Gun Load" 160-gr. DPX which can be found at; 160 gr DPX.htm

- Janq
1 - 5 of 5 Posts
So is this only designed for revolvers? Sounds pretty good. I would assume ACP is ACP.
highspeed11 said:
So is this only designed for revolvers? Sounds pretty good. I would assume ACP is ACP.
As noted in the article this specific version is for revolvers only.
I'd provided a link toward a review of a .45 ACP DPX variant that will work in pistols.

The rim on this variant will not work with the ejector of an automatic pistol.

- Janq
Ah ok. Thanks. I couldn't get that other link here at work so I didn't read it. I'll have to check it when I get home, unless you wanted to copy and paste? The round sounds promising.
Hmm, I bet those would work in my 45lc/454. The only thing that would make me say no is there is a very slight rim inside the cylinder where the 454 round brass ends/bullet starts. Don't know if the 45 acp bullet would trip up on that when fired since the brass is so much shorter.
1 - 5 of 5 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.