Best .223/5.56 for Defensive/Offensive applications???

[RogerinTPA]

Also, in Nam the rifling was a different twist than what is currently common

Agreed. Even after Nam, the twist was 1:12 on the A1's with a 20 inch barrel (which I first cut my teeth on) until adopting the A2 in the mid 80's. I don't know if this is off base, but wouldn't a faster spin (1:7) increase fragmentation or is the difference (1:12 v 1:7) too inconsequential within a certain distance and barrel length?

[decodeddiesel]

Also, in Nam the rifling was a different twist than what is currently common

I wouldn't think the rifling would make much of a difference so long as the round was sufficiently stabilized by the imparted spin. What would make a difference would be the barrel length with regards to velocity (fragmentation range) as the commonly issued M16s had a barrel length of 20" vs the 14.5" or 16" more often seen today. Of course 11.5" Colt Commando vs. 10.5" CQBR Mk. 18 is going to be 6 in one half dozen in the other.

Also I don't know that a 150lb NVA Charlie full of political fervor executing a bayonet charge is going to be any more "frail" or susceptible to M193 than Johnny With The Substance Abuse Problem coming into my home in the middle of the night looking to rip off my stuff and maybe rape my girlfriend. I would believe it is going to be equally effective on either target, but YMMV.

[RogerinTPA]

How does Privi 75grain stack up against MK262 and Tap 77grn?

Is the Privi 75grn considered match ammo?

[decodeddiesel]

How does Privi 75grain stack up against MK262 and Tap 77grn?

Is the Privi 75grn considered match ammo?

Excellent Question! Also how does the BH 77gr Match King compare I wonder. I was under the impression it was loaded to .223 SAAMI vs. Mk262 which is loaded to 5.56 NATO. Perhaps I am wrong?

[DocGKR]

Ahhhhhhhhhhhhhhhhh!!!!!!!!!

Folks this information is well known...do we really need to rehash it again???? If so, please read: https://www.m4carbine.net/showthread.php?t=19881

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For those folks who think the 55 gr M193 FMJ is a great 5.56 mm load for self-defense, the following quote was written by Dr. Martin Fackler, the man who has done more research on the M193 than anyone else on this planet:

“In 1980, I treated a soldier shot accidentally with an M16 M193 bullet from a distance of about ten feet. The bullet entered his left thigh and traveled obliquely upward. It exited after passing through about 11 inches of muscle. The man walked in to my clinic with no limp whatsoever: the entrance and exit holes were about 4 mm across, and punctate. X-ray films showed intact bones, no bullet fragments, and no evidence of significant tissue disruption caused by the bullet’s temporary cavity. The bullet path passed well lateral to the femoral vessels. He was back on duty in a few days. Devastating? Hardly. The wound profile of the M193 bullet (page 29 of the Emergency War Surgery—NATO Handbook, GPO, Washington, D.C., 1988) shows that most often the bullet travels about five inches through flesh before beginning significant yaw. But about 15% of the time, it travels much farther than that before yawing—in which case it causes even milder wounds, if it missed bones, guts, lung, and major blood vessels. In my experience and research, at least as many M16 users in Vietnam concluded that it produced unacceptably minimal, rather than “massive”, wounds. After viewing the wound profile, recall that the Vietnamese were small people, and generally very slim. Many M16 bullets passed through their torsos traveling mostly point forward, and caused minimal damage. Most shots piercing an extremity, even in the heavier-built Americans, unless they hit bone, caused no more damage than a 22 caliber rimfire bullet.”

Fackler, ML: “Literature Review”. Wound Ballistics Review; 5(2):40, Fall 2001

[RogerinTPA]

Sorry about the aggravation Doc...This and other subjects like lube, should be "Tacked" to prevent further irritation and increase quick reference to ground previously covered. A thousand pardons!

[Failure2Stop]

Thanks for coming in Doc.
Mods- is there any way that DocGKR's quoted info can be tacked here to avoid sending people over to TOS?

[decodeddiesel]

Thanks for coming in Doc.
Mods- is there any way that DocGKR's quoted info can be tacked here to avoid sending people over to TOS?

Here here!!

Thanks for once again imparting your wisdom and knowledge on us.

Still though I do wonder where PRVI 75 gr OTM stacks up against the T2 and SMK.

[DocGKR]

Hopefully we'll be testing some soon and I'll post the info.

[decodeddiesel]

Awesome! Can't wait to see the results!