How different weapons fling brass

[egd]

Wasn't sure where to put this, but I come here most so...
I shoot a 9mm pistol. Depending on the load my brass will fly varying distances, some only a couple of feet away.
I just bought a pistol caliber carbine. When I shoot the same bullets/loads in it the brass flies out into never-never land. WAY out! This got me to thinking.
The pcc is a blowback operated system. If I understand what that means, and I may not, wouldn't the pistol (a ppq striker fired) be a blowback operation also? And if that's the case and the same shells are used, why does one drop at your feet and the other fling them far away. There has to be more than loads involved. Strength of springs is what comes to my mind. IF that is the main reason, could/would changing the buffer spring in the pcc to a heavier one cause the cases to be less forcefully be ejected?
Not that I'm really wanting to, but I'm just curious. Thanks

 

[jmorris]

Any change you make can effect how brass is ejected. I have a few pistols that I simply changed the angle of the ejector to change the angle the case is ejected (so it would miss an optic on the way out).

If you really want to play "brass hunter" buy a mini 14.

 

[GBExpat]

... If you really want to play "brass hunter" buy a mini 14.

Or a CETME-C ...

 

[newfalguy101]

If you really want to play "brass hunter" buy a mini 14.

Or a Ruger p-90......



Your assumption about the pistol being blowback because the PCC is, is flawed thinking.

I don't know but seriously doubt the pistol is Blowback but more likely it is a locked breach and uses a tilting block lockup.

The carbine can easily "get away" with being blowback because the extra weight needed to keep the action shut is spread out over the entire gun, a blowback 9mm pistol on the other hand would be stupid heavy for a handgun.

 

[Reloadron]

The PPQ is a locked breech design. It is not a blowback design with the blowback design being the simplest, and cheapest to build. Most PPC rifles, the cheaper ones anyway use blowback. The link gives a few examples.

Where the spent cases land is a function of the individual gun and the mechanics of the gun. The extractor by name "extracts" the spent cartridge out of the chamber and the ejector "ejects" the spent case. They work together to extract and eject. How they are configured is totally a function of the gun. Yes, even the power of the load will change how extraction and ejection take place. Beyond blowback and locked breech there is also "gas operated".

Yes, some guns are harder on brass during ejection, many guns even have a reputation for being hard on the brass.

Ron

 

[egd]

OK, thanks. I did say IF I understood, and apparently I did not.
I learned something today.

 

[mdi]

OK, thanks. I did say IF I understood, and apparently I did not.
I learned something today

Cool, me too. I have found the load makes a big difference when a case is being ejected. My Garand will fling brass anywhere from 1:00 to the right to 3:00 or sometimes 4:00 depending on the load. Plus when the clip is ejected, the case travels only a couple feet. Same with my semi-auto handguns my 1911s are fairly straight forward at tossing cases somewhat close to each other, but my Ruger P90 will make brass hunting quite a task....

I guess I could "customize" the extractor/ejectors to toss empties to a certain spot, but I'm not too proud to pick up brass tossed hither and yon...

 

[Dudedog]

If you really want to play "brass hunter" buy a mini 14.

Yep.....

I would say my Mini 14 throws them 15-25', really not joking. (might even be 30' will have to measure sometime with a tape.)
With the same ammo my AR drops them about 6' away.

Different 9mm pistols I have, have a little different ejection patterns.

I would have to say my Mini 14 is the brass throwing camp of every semi auto I own or have owned.

 

[Walkalong]

My 9MM AR is a blow back design and it tosses the brass much further than my 9MM handguns. The handguns are locked breech designs and that delays the chamber opening. The velocity of the slide is less than that of the AR bolt carrier group. Brass doesn't hit the ejector as hard and doesn't go as far.

Playing with loads can affect the way your gun ejects brass. A high velocity load with a slow powder will usually fling brass further than a lighter load with a fast powder.

 

[Stewbaby]

...a AG-42 Ljungman has all those others beat. 25 to 30 feet easy and ever neck is typically dented. I've finally found a handload that shoots descent and doesn't damage too much brass...but it still flys 25'

 

[ColoradoShooter77]

I agree about the Mini-14, it goes 30 feet, easily. I use one of those big caldwell mesh brass catchers on the stand, to catch the brass.

My AR only throws it out 6 feet to the right.

I have a Hi-Point 40 caliber carbine and its not too bad, maybe 10 feet.

 

[Walkalong]

a AG-42 Ljungman has all those others beat

Saw one of those at the range once. I just had to go see what was tossing brass across the entire line of benches. He was on the wrong end for that thing. Very cool weapon.

 

[kcofohio]

I agree about the Mini-14, it goes 30 feet, easily. I use one of those big caldwell mesh brass catchers on the stand, to catch the brass.

My AR only throws it out 6 feet to the right.

I have a Hi-Point 40 caliber carbine and its not too bad, maybe 10 feet.

Mine, I have to go on a small scouting trip to find my brass.

 

[PCCUSNRET]

My Mini-14 throws the brass about 10 feet forward of the firing line. I don't bother shooting it when there are others shooting as I have to wait for the line to go cold to retrieve my brass. This is another reason I prefer a bolt action gun over a semi-auto.

 

[GBExpat]

The good news is that you can easily replace the ports on those typically-overgassed-from-the-factory Mini-14s.

No such easy fix for my CETME Cs ... except to always fire them from beside the netting.

 

[oldfortyfiveauto]

My FN49 throws 25 feet forward and my old HK93 35 feet forward

 

[splattergun]

yes, the powder charge affects ejection

one big reason that my favorite 9mm load in my P89 (4.3gn W231 under 124gn plated fn) is my favorite, in addition to accuracy and recoil, is because of where it throws the shell; about 2 ft behind and 3 feet to the right of me, all close together. Easy search and retrieve

But if I change that load upward, the brass goes farther out and farther back and into a wider area. If I decrease that load, the shell falls in closer to me, often hitting me, sometimes falling into my shirt pocket, or even down my shirt collar

 

[lauderdale]

Was not the ejection pattern of spent casings figured into throwing your enemy off in the 14? Like a chaggaret butt trail one might leave? Or did my older bro. bend the truth?

 

[highlander 5]

Had a CZ 52 in 7.62x25 that launched brass at least 30 ft. Put in a replacement heavier recoil spring from Wolff,cut the distance to 18 ft. Asked a friend to watch where my brass landed and all he saw was a blur flying out of the pistol.