Bolt actions, with their superior camming strength, will usually chamber cases that are too long. But if the case neck becomes long enough that it begins to contact and crush against the end of the chamber, accuracy decreases. Semiautos, on the other hand, are easily crippled by cases of excessive length. I've seen AR actions locked up so hard by an out-of-spec cartridge that failed to go into battery that the shooter had to pound on the charging handle with a 2x4 to extract the stuck case.
That's bad AR health care. Unfortunately, semiauto rifles tend to cause more case stretch than any other type of firearm. Grit your teeth and trim those cases when they grow out of spec. It will save you from considerable pain in your hindquarters later.
Bullets Seated Too Far Out. Precision rifle shooters tend to like seating uber-accurate match projectiles too long, intentionally causing them to engrave into the rifling ahead of the chamber.
Undoubtedly, many rifles shoot their best with match bullets seated thus, and the practice is arguably fine for use in precise shooting and competitive work.
But beware of loading hunting projectiles to engrave on the rifling. Many long-range hunter types shoot soft, match-type bullets a practice I disagree with on big game, and they seat their handloaded bullets to engrave. When the hunter goes to remove a loaded cartridge from the chamber, there's significant risk that the bullet will stick in the rifling and the case will pull off of it, spilling powder in the chamber and all through the action.
I personally witnessed as a good buddy lost a beautiful 5x6 bull elk because he'd done just that and couldn't chamber a fresh cartridge to shoot it with. Bullets Shaved by Case Mouths. More often than not, when you seat rifle bullets into new, unfired cases — and often when seating in once-fired factory cases — the crisp degree inner edge of the cartridge mouth will shave fine curls of copper from the bullet's jacket as it enters, potentially interfering with accuracy.
Make a point of chamfering the inside of new rifle cartridge case mouths with a low-drag case chamfer tool such as Lyman's VLD chamfer reamer pictured here. Excessive Crimping. Where necessary, a good crimp secures the bullet against movement. However, especially in handgun cases, reloaders sometimes apply too much of a good thing.
The result? Bulges in the case mouth just below the crimp area, creating a cartridge that will most likely fail to chamber. This is particularly likely to happen when reloaders attempt to seat and crimp the bullet in one operation. It's far better to seat all the bullets first and then crimp as a final, separate action.
And crimp just enough. There's no need to distort the case neck and squeeze the bullet out of shape. Weapons such as cannons, shotguns and rifles, work on the basic idea of conservation of momentum and the change in energy from potential to kinetic. Momentum characterizes an object's resistance to change in motion. If this is motion along a straight line, we call it linear momentum; if it is rotational motion we call it angular momentum.
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J James B. Shipping and service were fine. Review by James B. Price was twice over MSRP. T Tim C. Online ordering was great. Review by Tim C. The Online ordering was great. The best was a human answered the phone. Thank you. G Greg F. Happy Customer. Review by Greg F. My problem was choosing from the great selection you guys have. Real happy with AR 15 so far. This was a CorBon round. It took a lot of trial and error to finally remove the case without damaging the barrel.
After a round was fired normally in an AR15, the primer came completely out of the empty case and wedged itself between the BCG and the inside surface of the upper receiver. The BCG was jammed so tight that it could not be budged. The jam was cleared both times by beating on the charging handle with a short piece of 2by4.
This resulted in a bent charging handle and a deep scratch inside the upper receiver. What was common with both times was reloaded military cases where the primer pockets were reamed too much. One was 5. Be careful when reloading for an AR that the primer pockets are not oversized or loose. A friend and I were at the range breaking in his new Bushmaster AR After putting thru a little over rounds the trigger froze up.
So after packing up we headed to a gun smith friend of ours to have him check out the problem. He disassembled the AT an found a spent primer jammed in the trigger mechanism. He cleared it and the Bushmaster worked flawlessly again. We had policed our spent brass at the range so we went thru them and sure enough we found one without a primer. You tap actually slap it the magazine, rack the slide to eject the questionable round and load a new round, and press the trigger bang.
Rip—Remove the magazine and, depending on the situation, either dump it on the ground or secure it on your person as you may need the rounds in the magazine—but not the magazine as it may be the issue.
Work—Rack the slide, maybe several times, to extract the round if one is in the chamber. I was shooting targets with a prestige 9-mm pistol when it jammed.
I dropped the magazine, tried to rack the slide, but everything was like a solid rock. I tried to pry the casing, but it did not move. I used a slim-nose pliers to tear the brass casing, after a couple of strips were removed, the casing fell free. I continued to shoot without issue, but sent the pistol back to the manufacturer, because I considered the problem to be an unacceptable failure. The manufacturer fixed the difficulty without charge.
No recent repeats, although there are occasional stove pipes using grain munitions. I have a sw9sv I have a bullet in the chamber. And am worried about trying to fiddle with it to much to get it out in case of the round going off. Has anyone heard of this kind of jam. For a Double Feed — in most cases, you need to first relieve the pressure of the slide on the cartridges. This requires you to lock the slide back, then strip the magazine out before your rack — rack and reload the magazine.
Went to Vegas. Shot a AR15 for my first time. It jammed on me, so instructor took the clip out checked gun then put clip back in He gave it back to me, I tried to fire, but just click click He tried, but just click click, no fire. He brought the target back, checked the holes.
There was one hole missing, but one hole was perfectly circular and twice as big as the others. Just a guess. I have no clue what happened. After working as RSO for a long time I have come up with the following reasons for jams in semi-automatic handguns. Limp Wristing — allowing the firearm to move in your hands.
Almost all of the common semi-automatic handguns are powered by recoil. If you allow the firearm to move in your hands, you absorb recoil energy needed by the firearm to operate. In other words it runs out of energy before completing the cycle. Solution, change and tighten your grip.
If this fails to help, go to step 2. Ammo Problems — some firearms, particularly small calibers such as. Opinion, not fact; some of the newer ultra small firearms in. Solution, change ammo brands and bullet weights. Magazine Problems — most commonly bent feed lips but it can be spring tension or needed lubrication. Solution, change magazines and see if the problem continues.
If you firearm did not come with multiple magazines you definitely need to at least obtain a second on. Sometimes on the range there will be someone with the exact same firearm you are having problems with. Ask to borrow on of their successful magazines. Problem with the firearm — if your firearm is brand new and you call the manufacturer to report a feed problem, unfortunately you will probably be told to fire at least rounds through the gun and call back when you do.
I find this to be a dangerous situation on the firing line. At this point instead I would take the firearm to a reputable gun smith and have him find the problem and write up what he finds wrong and repairs. Then go to the manufacturer. Thank you for such a brief and precise explanation to the many problems gun owners often encounter.
Yes, even a Glock can jam, and when it does this information will be vital.
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