buzz

If you have an M1 or M1A1, I recommend that you put a foregrip band on. Once that band is on and tightened properly, the foregrip becomes extremely rigid. I doubt you could break the grip mount when the band is in place. Unless you pried at it with a screwdriver. Did they use them on 1928A1s also? If so, I would put one on a 28A1 as well. BIG improvement.

you weigh each round? RCBS makes a nice powder checker die also, you can tape a light to your press and peek into each case before you seat the bullet. a visual inspection is as good as weighing the round

I tend to believe that the second bullet hitting the back of the first bullet is what causes the bulge, not an air pocket being compressed. Look at the way the lead squirted out of the barrel in this video. Lead is a weird metal, it has the property of flowing like liquid when under very high stress. I also don't think that a ruptured barrel is a big deal. the PRESSURE of combustion is an accelerant for the combustion rate. so anything that prevents the bullet from uncorking the barrel can drive the pressure way higher than normal. so when a bullet gets stuck or a cartridge is fired out of battery, the effect varies from no harm at all to the gun, to the gun blowing apart. It all depends on how much pressure builds before it's vented and how it's vented.

This is something I have thought about a lot: how much politeness is appropriate in a given situation. We all stand at the altar of stupidity and make a fool out of ourselves once in a while. But when someone acts this ridiculous and malicious, then all obligation to be polite to the guy is gone. Just give him the heave-ho and good riddance.

This is one of the best technical gun forums on the internet. It has been an invaluable source of information for me. If you can't get along with the people on this site, you have "issues".

Scrambles is pathetic and he doesn't belong on a technical forum like this one. I'm not saying that as an insult, it's a simple statement of fact.

maybe a Buffer made of "Flubber" or super ball material? If you really want to make a change in the force on the receiver, you need to make the buffer much thicker. The neoprene buffer that we use now only probably compresses by 1/100th of an inch. You want something that is thicker and squishier. The problem is that squishy elastic materials dampen out a lot of energy, turn it to heat. I would not make a real thick neoprene buffer, you'll just jam the bolt to a stop sooner and use the recoil spring less. The recoil spring is your friend. Why not denser ? what you're trying to do is lower the accelleration force on the bolt if you lower the force on the bolt, you lower the force on the receiver. the softer (or weaker) that the spring is, the more it will compress when the bolt hits it the more it compresses, the longer time it takes for the bolt to stop the longer time it takes for the bolt to stop, the lower the force is if you were bungee jumping, would you want to use a real stretchy bungee cord that took 30 seconds to slow you to a stop, or a real stiff one that jerked you to a stop in one second? same job, different amount of force used the weaker bungee might take 100 feet to stop you, but the stiff one only takes 2 feet. so if you want to stop the bolt with less force, you need a thicker buffer that's made from softer material. The ideal thing would be to use a stiffer recoil spring that stops the bolt 1mm away from the buffer because that way you have the whole length of the bolt retraction to stop the bolt, a nice smooth decelleration

The big mystery is what this means: "And please Buzz, . I see your unproductive posts across many of the boards, "oh that's not gonna happen, too bad etc". It's a reoccurring theme. Pessimism isn't going anywhere. Go radius the sharp cut on your K frame and shoot it forever. You are more of a detriment to this community than ANYthing else." This is the only forum where I use the username "Buzz", so if there is some guy named Buzz being a pain in the ass on some other forum, I can't claim credit. I did a google search on "posts by Buzz" and I found a whole giant bussload of Buzzes. Like this fancy pants guy: http://thebuzzblog.hercules-design.com/blog/author/admin/ I found this guy on a pinball website, seems like a nice sort of person, gives blood: https://pinside.com/pinball/forum/topic/saving-pinball-through-blood-donation So I'm not really seeing all the negative and pessimistic posts by the guys calling themselves "Buzz". Seems actually like an upbeat sort of crowd. Buzzes unite!

That story has a real "my granddad carried this AR15 in WWII in Stalingrad with the 101st airborn" feel to it.

that thing is a headache, in a way its ok it give a certain degree of protection, but if i show you a picture of the trigger frame interior, you will have some real nightmares, you could literally pick it with a spoon. meh, once a gun comes out of storage, I don't see any purpose served by leaving the cosmoline on try heating the gun with the hair dryer, just leave it on the gun for a half hour until the metal stings your skin a little, the cosmo will get nice and runny

maybe a Buffer made of "Flubber" or super ball material? sure, why not? The thing is, if you want to reduce the load on the receiver a lot, you need to increase the distance that the bolt is slowed down. If you brake to a stop in your car in 1000 feet, the braking force required is twice as high as if you come to a stop in 2000 feet. If you really want to make a change in the force on the receiver, you need to make the buffer much thicker. The neoprene buffer that we use now only probably compresses by 1/100th of an inch. You want something that is thicker and squishier. The problem is that squishy elastic materials dampen out a lot of energy, turn it to heat. I would not make a real thick neoprene buffer, you'll just jam the bolt to a stop sooner and use the recoil spring less. The recoil spring is your friend.

Not sure what you mean. There's no way to eliminate the "kick" of the firearm. picture if the gun was floating in outer space and nobody was touching it. when the round goes off, the bullet and the gunpowder go left and the gun itself goes right. the mass of the bullet and the mass of the powder times their velocity will equal the mass of the gun times velocity of the gun M bullet x V bullet + M powder x V powder = M gun x V gun the bullet will go about 850 fps, the powder will go about 4700 fps and the gun will only go about 20 fps because of the heavier weight of the gun. since a moving object has kinetic energy, the kinetic energy of the gun is called "the free recoil energy" and this number is used to compare how hard guns kick. no matter how many springs the gun has inside, the final rearward velocity of the gun and free recoil energy will be the same.

If you set a hair dryer with the hot air blowing on a gun, the metal will become hot enough after a while to liquify cosmoline and you can wipe it right off

I welcome any opinions on any topic, as long as people don't start screeching at me like an angry fishwife. If someone points out a mistake on my part, I figure they did me a big favor. I'm not too proud to take correction when it's offered. This is actually a real good topic, who knows, maybe someone will come up with a miracle buffer. The problem with this topic is there is no data and there are a lot of unknowns. The way the bolt jerks around in there makes it hard to even come up with a comparative or qualitative statement. The only thing i can come up with to say at this point is that the bolt has about 20 ft-lbs of energy and that's not a lot, it's practically nothing. The gunpowder has about 1000 ft lbs of chemical energy, about 400 gets used to propel the bullet, the bolt picks up around 20, the rest is lost to the air as heat. That's not very much energy, it's hardly anything. Your arm can deliver about 17 ft lbs of energy with a 1 lb hammer.

Every time I look at this thread I end up sitting and thinking for 20 minutes. I'm trying to puzzle this out qualitatively because I don't have any data. I found this slow-motion video of an M1A1 firing, you can see that the bolt has some decent amount of velocity when it thumps against the buffer. It looks like it's hitting the buffer fairly hard. But is it hard enough to care about? Think about it, the Garand operates with huge force, the op rod handle comes back so hard that it will split your hand open. If that doesn't bother the Garand receiver at all, would 1/10th or 1/20th of that amount of force bother a Thompson?