.223 DRT 79 gr

[DocGKR]

There has been much speculation about the new DRT projectiles. As noted in previous threads, DRT (http://www.drtammo.com) appears to be producing the same type of powdered metal projectiles previously made by Powell River Labs and used by some U.S. units in the late 1990's. The PRL 5.56 mm and 7.62x51 mm rounds offered superb accuracy and terminal performance, however PRL had some production and QC difficulties. Dr. Fackler presented a paper in the IWBA Journal discussing the 5.56 mm 76 gr PRL tungsten-tin core rifle projectiles: Fackler, ML: "Tungsten Frangible Bullet Wounds in Pig: Exam by Autopsy and X-Ray". Wound Ballistic Review (4)3:33-34 Spring 2000. We independently tested the 61 and 87 gr versions of the PRL bullet at the CHP Academy in late 1999 and had similar results. Ironically, the PRL/DRT bullets are true "Blended Metal" projectiles...

Like the 61 gr, the current 79 gr DRT ammo is a bit deficient in penetration; it would be great if they started building the 87 gr version again...

.223 DRT 79 gr in bare gel at 10 feet from 16" barrel:
http://i459.photobucket.com/albums/qq319/DocGKR/556DRT79gr.jpg?t=1235270079

[bkb0000]

so does this mean its gonna be half expanded before it even punches through the sternum?

[Jack-O]

Doc,
-did you test accuracy? I know you had mentioned these had great potential for accuracy
- what would be a correct usage for these rounds? are they usable for combat or patrol?
-what was the velocity?

[worldskipper]

We need to get these guys to make a 115 gr 6.8 bullet, that would be VERY nice.

[DocGKR]

Jack-O: The 87 gr version is the one noted for its accuracy--it was a superb long range sniping round for unobstructed targets. Currently, the this 79 gr load is more of a varmint round and probably lacks adequate penetration for most LE use. I don't have the velocity figures with me, but will check the chrono tape when I get some time and post that information.

A 6.8 version would have great potential.

[QuietShootr]

Ironically, the PRL/DRT bullets are true "Blended Metal" projectiles...



<snicker> Good stuff, as usual, Doc. Are they contemplating making the 87gr again?

[TiroFijo]

In this gel test only three small fragments penetrate more than 8", what is the penetration range of the 87 gr load?

How does this load (87 gr) perform with intermediate barriers? Is it intended only as a "limited penetration" round for specialized use?

Finally, I read a couple of years ago about Seller & Bellot buying the rights to manufacture these bullets, but I don't know if they ever actually made them.

[DocGKR]

As noted above:


"The 87 gr version is the one noted for its accuracy--it was a superb long range sniping round for unobstructed targets."

So it does not do well against intermediate barriers, but does provide superb long range accuracy. Penetration in bare gel was in the 11 to 12 inch range.

[Zhukov]

As noted above:

So it does not do well against intermediate barriers, but does provide superb long range accuracy. Penetration in bare gel was in the 11 to 12 inch range.

Thankyouthankyouthankyou!!!!

I'm off to update the Exotic ammo FAQ - I've seen more people asking about this stuff, and it's good to finally have some data...

[ETA] Do you have any data on their handgun bullets?

[Jack-O]

I should ask...

are these rounds about the same length as a 75-77gr projectile? since they would seem to be heavier and possibly shorter, I'm wondering what twists these would work in. Can they still operate in a 1-9 or will a 1-8 or 1-7 be required?

[DocGKR]

Let's see, the bullet enters tissue, yaws, fractures, with core fragments spreading radially into tissue prior to the tissue being further disrupted with the temporary stretch that is following the projectile...the mechanism is the same whether it is a 55 gr M193, 62 gr M855, 77 gr Mk262, 79 gr DRT, 87 gr PRL, or 100 gr BH. Since bullets that yaw and fragment in tissue were specifically not prohibited by the Hague Convention and this position was not disputed by the 1978 UNCCW Conference and was again reconfirmed during its review in 1994 - 1996, what seems to be the issue here?

[DocGKR]

Do not confuse advertising with fact...

[RWK]

...the wound produced will be "the size of a soccer ball".

...like "throwing a food blender into the target".

[whistle] BS advertising flag on the field!

[sinister]

The US Government uses PRL bullets as FRANGIBLE cartridges -- they're SUPPOSED to break up and turn back into dust if they hit something solid.

[Heavy Metal]

Interesting video with the Mandrel sisters.

Louise needs to work on shooting on the move.

Irene needs to get my apartment key and not worry about anything else:D

[DocGKR]

I believe Mr. Beal invented the design.

The PRL/DRT is great for what they are intended to do; I prefer them to a lot of other frangible options that are out there.

[sinister]

I guess that includes enemy combatants/soft targets?


The US Government...which includes federal law enforcement officers and entities...