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Chilltech, I know you didn't, but as the last guy known to touch your gun, I'm always concerned when a problem develops. I hope the new pin cures that for you. I try and be available to all of my customers on technical issues, related or not, to any work I do. Let us know how that works...

Hmm. Chilltech, sorry to hear of your frustration. The mainspring housing was replaced with a standard bar stock unit, along with a 20lb mainspring. You also have a standard power firing pin spring with the factory Ti pin. This is a standard combination we use with the optimized hammer and...

Im really interested in that 135 grn at 1450 fps? Quite a warm load as pointed out. Factory 9x23 is 124@1450 and quite brisk.

Double

You clearly agree with whats stated then. No bullet movement, no exit pressure=no recoil. Simple. Glad we could agree on something without petty insults. :)

That would be a good start, but you would also need to attain velocity to get a true measure. Thats where it would get tricky. Good thinking though. CW

Yep. It does and was widely covered in this thread. If the cartridge doesn't cause recoil, what does? Recoil is a result of cartridge ignition and the resultant chain of events.

I never stated the gas blowby initiates the slides movement. "Whatever it adds...and I know that everything means something...in this case, it would be so insignificant that it can be ignored. If there was zero gas escaping past the bullet, it wouldn't make a whit of difference in what the...

Ok, then we'll go back a little. Let's for the moment ignore the gas effect created when the bullet leaves the case and start immediately after the bullet obturates. You now have the bullet, case, barrel and slide locked together. In reality they are already moving due to the event Log...

I completely agree.

I think we are agreeing from two different directions. Gas blowby is limited and brief and simply aids what happens forward of the bullet. I agree with the hypothetical spring driven system. Once the bullet obturates, you now have an expanding pressure vessel contained by the slide...

...I never said it wouldn't. The escaping, compressed column of air, forward of the bullet, is what drives it even without the aid of escaping gas. Quite elementary when the videos are looked at I would suggest doing a little further studyin' yerself! Explain what the compressed air in...

There is heat, but not enough to anneal the barrel. Warm to the touch...maybe. An interesting aspect of that, is that in firing one projectile behind another, both will move, while moving closer together, until the barrel bulges and the pressure drops...leaving a bulge with two bullets, one on...

Ransom Rest no less, ....Priceless log!

Old technology, in a new way, supporting old slabsides... :) CW

I agree with that except for the heat annealing the metal. Even with a kinetec energy dump. Barrels have been sectioned after being subjected to this and found to have no heat effects other than that imparted when bulged(minor). It is that very thing that allows metals to reach a certain...

That will happen when you compress that little column of air...enough pressure to bulge a barrel..................... ;)

compressed air? :)

...Illustrating exactly the movement and the little amount of pressure, comparatively speaking, required to keep the slide assembly moving before bullet exit. CW The barrel being locked to the slide was a given.

Very well and clearly put Jenrick. Better yet, whack the bullet from the front with less pressure, and watch the slide move.