1911Tuner
Moderator Emeritus
Carl...Correct again. See? That bullet is smart. It knows what to do...
And neither does it take thousands of pounds of force to cock a blowback pistol...but if the slide didn't have a mechanical limit, the county coroner would have to pull it outta your head before callin' anybody down to ID your body...
That "extra" force can't simply disappear,
Try to keep up;
all these "thousands of pounds" of pressure that you insist is produced by the act of firing a bullet down a barrel?
While I have never fired one of these that you talk about I can just about bet the farm that there is rearward recoil when fired. That would account for the effects of some of that pressure that is forcing the bullet down the barrel.
SD...Have ya ever heard of a little thing called an impact surface? It's what stops the recoiling slide in an autopistol. It's made up of the rear face of the slide's spring tunnel and the front face of the frame rails. The recoil guide rod flange is sandwiched between the two surfaces. The slide strikes it and comes to a stop. Thus, the unnecessary energy and momentum of the slide is absorbed and causes about half of the muzzle rise that we experience as recoil.
The oddball design that you're referring to would require one for the barrel as well. Otherwise, it would launch downrange for a pretty fair distance.
Firing a bullet down a bore certainly produces SOME "barrel drag...
But, he further claims that this is an immensely powerful force, so powerful that it can beat and pound the lugs of a 1911 to the point where they don't lock properly anymore.
Yet, all that this pistol requires to stop the forward movement of the barrel is a lightweight spring, an ounce or two of metal in that barrel,
SD...Have you tried to manually push a bullet through a barrel? Actually tried it?
Where did I say that? Do you have the first clue how the pistol works?
That's about all that it takes to stop the slide on a 1911...or haven't you noticed?
Yes, I have tried it, and it's impossible to do it without some sort of tool. This has NOTHING to do with the issue you're trying to convince me of, since the levels of force involved are vastly different between firing a bullet down a bore and manually pushing that bullet down that bore.
However, you claim that this "bullet-pulling force" is one of the things that makes the 1911 work the way it does, and there is no evidence at all for this idea.
The barrel slide combo is crawling with a peak velocity of 20 fps or so.
BTW, I think he's right. I'm pretty sure if you give the breach face a good whack, while never touching the barrel the gun will cycle just fine
Using the momentum equations allows you to ignore all the other forces.
We can take an actual pistol, with a specific lot of ammunition, and take some measurements. We can get a pretty good pressure curve for the ammo, but if we do what Jim wants to do by boring out the rifling, that pressure curve is useless.
There's ample evidence. You simply refuse to believe what you're seeing.
I can see the impact/stop mechanism clearly. Can't you?
If you have to impose a thousand pounds per square inch of force to push the bullet in....would it also make sense to believe that the barrel itself is under a thousand pounds per square inch of force in the same direction?
Have you ever seen a barrel lug crack in the bottom corner... or even pull loose from the barrel, bringing a hunk of the barrel with it? I have...Many times.