John Lovell gives a tutorial. I still consider the Magpul “Art of the Tactical Carbine” to be the best. However, John provides some helpful tips.
Finding the “small of he shoulder” is difficult if you lift weights. What happens is that the butt always lands on the pec.
Also, the thumb-over-bore grip is cool, but my son said what John did. My son conducted room clearing for hours and days, and the only grip that works for that long is a much closer one.
Two Senate Democrats falsely claimed Monday that the AR-15 is not used for hunting and isn’t “viable for home protection” in a tweet promoting gun control proposals.
Sen. Dianne Feinstein (D., Calif.) and Sen. Chris Murphy (D., Conn.) penned an op-ed in TIME calling for the banning of AR-15s and similar assault weapons.
“Guns like the AR-15 aren’t used for hunting and they’re not viable for home protection. They have only one purpose, and that’s to fire as many rounds as possible, as quickly as possible,” they wrote. “Outlawing these weapons, an action supported by 60 percent of Americans, will bring down the number of mass shootings and reduce the number of casualties, just as it did when the ban first passed in 1994.”
However, the AR-15, the most popular rifle in America, is used for hunting and home defense. MRC-TV noted a poll showing more than 25 percent of hunters reported using the rifle to hunt big game. In addition, the rifle is popular for home defense given its light weight and limited recoil, making it easier for owners to handle.
It’s only good for shooting at multiple home invaders, and managing recoil while regaining sight picture quickly, and ease of handing, and so on, and cops use them all the time, but they are no good.
Every day is opposite day, I guess. I feel like I’m listening to a child explain calculus.
The competitor, Sgt. Benjamin Cleland of Swanton, Ohio, pulled off the feat at the National Rifle Association’s 2019 Charlie Smart Memorial Regional in Oak Ridge, Tennessee on June 2, with a score of 800-34x. This means Cleland not only notched 80 back-to-back hits in the 10-ring but that 34 of those nailed the even smaller “X” ring at the target’s dead center. For reference, at 600 yards, the 10-ring measures 12 inches while the “X” is 6 inches.
[ … ]
The 80-shot course is fired in four stages. This begins by firing 20 rounds from 200 yards in a standing position, followed by 20 sitting/kneeling, rapid-fire rounds before delivering 20 rounds from a prone position at 300 yards. The final stage, at 600 yards, consists of a further 20 rounds. A perfect score is 800, or 10 points for each round in the 10 ring.
The previous high score with a service rifle was a 798 set by Marine Gunnery Sgt. Julia L. Watson.
Service rifles in the match are limited to M16s, M14s and M1 Garands with a maximum of a 4.5x power scope.
That’s 1-2 MOA shooting for 80 straight rounds, some of it rapid fire. That’s extremely consistent shooting. That’s something we should all be striving for.
From the comments, “And He spoke to his disciples, saying “nay, it cannot be direct impingement, for behold… there is a piston.” Thence He demonstrated the operation of Stoner’s rotating-bolt gas-key system, and they beheld his truth with their own eyes,” and “Saint Stoner of Armalite.”
What’s mechanical offset and how do you deal with it? If you have an optic on a firearm, particularly a rifle, the line-of-sight through the scope is higher than the center of the bore, and that difference is what we call offset. In other words, when you take a shot the bullet is going to exit the barrel as much as several inches lower than the line of sight.
[ … ]
To check this out, you’re going to need about 50 rounds of ammunition and a target. I suggest you fire three-shot groups, holding center, from 3, 7, 10, 15 and 25 yards. I think you’ll discover that your rounds are striking somewhere around 2 to 3 inches low at 3, 7 and 10 yards. At 15 yards, the group will still be low, but a little closer to point-of-aim. At 25 yards, point-of-aim and your three-shot group should be pretty close to coinciding.
Next, try shooting those same three-shot groups at 3, 7, 10 and 15 yards again, but this time hold high to account for the offset you observed the first time around (remember, the 25-yard group should be close enough to the center to not warrant significant correction). If you hold correctly, you should end up with centered hits at each of the distances. One quick example might be holding 3 inches high at 3 yards. Continue to practice getting used to the various mechanical offsets by shooting snaps—one shot standing from ready—at each of the various ranges until you thoroughly understand your offset holds.
Travis Haley refers to this as “height over bore” in the Magpul Dynamics “Art of the Tactical Carbine,” which is a very good video series. I highly recommend it.
If this matters to you in CQB, you should check out your correction on a short range.
If you don’t do anything else today, watch this video entirely. It’s well worth your time. There is also information presented by Stoner that doesn’t fit the narrative, so it’s a good history lesson.
Do you think it would have been fun to have worked with him? I do.
Chamberlin observed damage remote from the wound channel he ascribed to the hydraulic reaction of body fluids [CHA66]. Tikka et al. showed that ballistic pressure waves originating in the thigh reach the abdomen. Wounding and delayed recovery of peripheral nerves have been reported [LDL45, PGM46]. Pressure waves cause compound action potentials in peripheral nerves [WES82], and ballistic pressure waves have been shown capable of breaking bones [MYR88].
This shows that, all other factors being equal, bullets that produce pressure waves of greater magnitude incapacitate more rapidly than bullets that produce smaller pressure waves. The Strasbourg test data convincingly supports the pressure wave hypothesis and allows (perhaps for the first time) the fast response time to be modeled as a function of peak pressure wave magnitude.
[ … ]
The trend in bullet design over the last decade has drifted toward bullets with little fragmentation and a higher percentage of retained mass. Bullets that both fragment and meet minimum penetration requirements create larger pressure wave magnitudes and offer improved incapacitation potential.
There is much more at the link. I find it especially interesting that the authors use a 4*pi()*r^2 model for pressure wave solid angle (as with sound, light and radiation, unattenuated [or scattered] and unreflected). The pressure wave isn’t forward peaked.
I often claim I have the best readers on the internet. I really mean it. This is a good example of that.
And this analysis goes to the heart of the design of the 5.56mm round, which is to induce a pressure wave due to high velocity (KE = 1/2 * m * v^2) and then fragment into shrapnel with multiple wound tracks.
I’ve seen a lot of pistol shootings, much more than US police would ever see, and much more than experienced by most medics deploying solely with US personnel. And yet, I have zero, not one single experience, where a single gunshot wound from a 9X19 NATO round killed someone prior to them being able to return fire or flee. This includes people shot in the chest, back, back of the head (one hit behind the left ear) the neck and the face. None…
Unfortunately, the same goes for the 5.56 NATO round. I have yet to witness a single shot quick kill with this round… On the flip side, having a patient who was shot by a 7.62X51 NATO or larger round was a rarity. Dead people aren’t patients, they are a supply issue.
That isn’t so much astonishing as it is just bizarre to me. First of all, I dislike it when someone begins their post with bona fides. The data is the data, the analysis is the analysis, regardless of your bona fides.
But then the claim makes no sense. My youngest son had absolutely no complaints about his weaponry when he deployed to Iraq, not did he when he came home. He was quite pleased with the lethality of the 5.56mm round in CQB and urban combat (MOUT). He used both his SAW and an M4, and actually both during room clearing operations.
Then there is the issue of what we know about the lethality of the round even at distance. Everyone recalls the video that made Travis Haley famous, and it’s worth watching again just to demonstrate that in the hands of a competent individual, the round can be lethal out to 600 yards or beyond.
Custom barrel manufacturers like Obermeyer, Krieger, Lilja, Hart, Douglas, Schneider and other companies which go by the maker’s last name, are your best assurance of good quality. That’s not to say that other maker’s barrels―let’s call them “semi-custom”―don’t shoot as well, but it is to suggest a lower element of risk involved in your satisfaction. I think it’s wise to request a stainless steel barrel since they will, on average, shoot a little better for a little longer.
It would be nice if a materials engineer and/or a highly experienced gunsmith would weigh in on this, but that’s not my understanding. My understanding (which might be flawed) is that a SS barrel will be more accurate out of the box, but that whereas another barrel might last for 25,000 rounds, a SS barrel will last for 15,000 rounds before needing to be replaced. Again, if my understanding is wrong on this, it would be good to know it.
The chambering option that probably gets the most thought about and worry over is throating. Throating, let’s say here for simplicity, controls the distance of a bullet; bearing surface to the origin of the lands of the rifling. Almost always, a rifle shoots best when a bullet at least starts near the lands, if not on them. If the bullet has to travel through space before engaging the rifling, that’s called “jump,” and that’s an issue of concern. Since there is such a difference in comparing length of short range and long range bullets for this rifle, some compromise has to be met. Essentially, getting less jump for the shorter 68- to 77-grain bullets fired from magazine-length rounds means that the longer 80-grain bullets used at 600 yards will be seated more deeply into the case (which will reduce powder capacity). Short or long? Either, or anything in-between for that matter. It doesn’t really seem to matter. Why even talk about it? Why not? Everyone else does. What they’re not really talking about, though, is who’s shooting what scores with various ideologies. That’s because AR-15s shoot just as well at 200 and 300 yards with all the different “magazine” bullets, regardless of where those bullets are sitting with respect to distance from the lands. What matters to 600-yard performance is that the shooter knows how to experiment and adjust the amount of jump the 80-grain bullets have, and that discussion is for another article.
Someone care to elaborate what’s he’s talking about here?
6 years, 10 months ago
