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-   -   Strange question for you all (http://www.firearmstalk.com/forums/f14/strange-question-you-all-86060/)

12fretter 03-08-2013 01:51 PM

Strange question for you all
 
Handgun:

On a DAO, you pull the trigger, the hammer cocks, then the hammer falls, explosion, rack, reload...and you're off to the next round. Right?

Revolver:

You pull the trigger, the hammer cocks, then the hammer falls, explosion, cylinder rotates - effectively reloading...and you're off to the next round. Right?

So why is the handgun considered a semi-auto but the revolver isn't?

GeneralPatton 03-08-2013 01:58 PM

I may be wrong in this, but I believe that the revolver works on mechanical motion, whereas the semi-auto use the recoil from the expended gasses to cycle the action and chamber the next round. Again, I could be wrong.

JonM 03-08-2013 02:18 PM

Quote:

Originally Posted by GeneralPatton (Post 1168505)
I may be wrong in this, but I believe that the revolver works on mechanical motion, whereas the semi-auto use the recoil from the expended gasses to cycle the action and chamber the next round. Again, I could be wrong.

correct.

semi auto means the firing of the round cycles a new one into the chamber and cocks the hammer/striker at the same time.

StainlessSteel215 03-08-2013 02:22 PM

I always thought you could consider a modern day rotating cylinder revolver as a semi-auto. You pull the trigger and it goes bang, up to 8 times. But yeah its in the physical mechanics of the gas pressure cycling of the semi pistol that makes it a true semi.

Not a world of difference to your index finger though ;)

eatmydust 03-08-2013 02:30 PM

I could be wrong here also, but I believe John Brownings original semi-auto pistol was DA/SA, the action of the slide not only ejected the spent round and chambered the next round, but also cocked the hammer to make follow-up shots SA.

I don't know the evolution of DAO semi-autos but since they use the same operation as Brownings original, they are lumped together in the semi-auto category.

c3shooter 03-08-2013 02:35 PM

Yep. And with a revolver, the cylinder rotates BEFORE firing, not after, and for a single action pistol (1911A1) firing the first shot causes the hammer to be recocked. This does not happen with a revolver- Except in the case of the Webley-Fosberry AUTOMATIC REVOLVER.

And a semi-auto would perhaps be more accurately described as auto loading or self loading (which was the term used in Germany long ago)

therewolf 03-08-2013 02:40 PM

What we seem to be glossing over here is the revolver

requires the DA every shot. As opposed to the semi,

which is SA after the first DA action on the first round.

eatmydust 03-08-2013 02:49 PM

Not to hijack the thread but does anyone know the evolution of the DAO semi-auto?

c3shooter 03-08-2013 04:26 PM

Evolution? Law enforcement agencies with poorly trained shooters. When you have a very light trigger pull, they shoot without meaning to. The DAO pistols generally have a much heavier trigger pull.

Makes it harder to shoot yourself in the ass when returning pistol to holster.

:p

Trez 03-08-2013 04:27 PM

Quote:

Originally Posted by c3shooter (Post 1168534)
Yep. And with a revolver, the cylinder rotates BEFORE firing, not after, and for a single action pistol (1911A1) firing the first shot causes the hammer to be recocked. This does not happen with a revolver- Except in the case of the Webley-Fosberry AUTOMATIC REVOLVER.


........ And the Mateba auto-revolvers. ;)


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