Why don't more cartridges have plastic casings?

>>33552639
Because plastic casings held under spring pressure against the metal of a magazine isnt incredibly reliable

>>33552639
>Not an expert
I'm pretty sure it's because they tend to deform when stacked under pressure in stack-magazines, leading to feeding issues.
Just guessing from the problems shotgun shells have

>>33552672
That makes sense. Thanks for the reply that doesn't call me a retarded muppet for asking a question.

Only poor niggers use NON reloadable steel


Plastic doesn't replace brass because plastic can't absorb heat without melting

Cannot be reloaded more than three times on average

And cannot contain the pressure of anything higher than 22lr


Brass shells are by far better, theres just not enough profit margin to justify increasing the per round count by 50¢

>>33552682
Retard.

>>33552639
troll but w/e.

People are already working on this, as the price of brass increases and the strength of polymer cases and ease of manufacturing them increases they will become more common.

>>33552672
what is saiga?
stacked plastic shells in a metal magazine under spring pressure?

>>33554826
A shotgun, now think if it were 30 of them in much thinner plastic in the form of 5.56. You think the thinner plastic wont bend? The force of the bullet in the chamber won't accidentally bend the neck every so often due to the casing having to be thin?

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>>33553761

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Just you wait.

>>33552639
cannot withstand high pressures, shotguns use low pressure rounds

>>33554826
saiga shotguns have issues with shell deformation if you leave them loaded

>>33552639
They can only handle low pressure.

>>33554859
Whatevs. Nobody needs 30 rounds.

>>33556115
a friend who has one said the spring is so strong you can never really load the magazine to full capacity, 5-6 shells at most, and if you try to load more it'll cause feeding issues
but maybe it just takes time to break in

>>33556670
Fuck off back to California.

>>33556670
THEN WHATS THE POINT IN LIGHTER AMMO?

>>33556681
My vepr 12 never had this problem with the 5 or 10 mag or the 25 round drum

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>>33556701
maybe they just sell shitty magazines on the domestic market

>>33556713
Possibly. I've heard that quite a few aftermarket saiga 12 mags are of poor quality. I assumed he meant the stock mag though.

>>33552639

Plastic and polymers have issues with current cartridge formats. As one anon said, polymers can't take high pressure loadings without causing the accuracy to plummet. The strength to volume ratio isn't there. The LSAT/CTSAS cartridge tries to address that by telescoping the round and using very thick plastic, while the .264 USA uses a very slender shoulder angle to distribute the load more evenly. Both of those cartridges are still in the development phase.

>>33552699
>And cannot contain the pressure of anything higher than 22lr

That is objectively false as demonstrated by a shitload of totally plastic shotshells AND the LSAT program

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>>33557207
Per SAAMI
10 gauge 11,000
12 gauge 11,500 (except 3-1/2 in.)
12 gauge 3 1/2 in. 14,000
16 gauge 11,500
20 Gauge 12,000
28 gauge 12,500


22 short = 21000psi
22 LR =24000 PSI
22 mag =24000 PSI (no it is not a typo it is the same as the LR)
17hmr=26000psi
So please anon. blow it out your ass. next time do some fucking research.


The LSAT is experimental and really not in the same league being caseless....

>>33556700
To avoid exploding the deer of course.

>>33556693
Nuh-uh sweetie. You know you do not need firearms at all but a single shot shotgun for home defense.

>>33552639
>scratch your parts to hell like steel

Is your gun made of cheese?

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I fired off a cylinder of these in a Smith Model 10, way back in the day, and I still have one floating around somewhere. Surprised it hasn't gone anywhere.

>>33558770
And you do not need more than a toilet, bed, and stove, but the extras are nice to have, yes?

A shotgun is a low pressure weapon, and doesn't require a full brass shell.

Also of note, magazine fed shotguns are fairly new. A shell is just one step behind a casing, and one step closer to being a paper powder wad in a muzzleloader.

The first cartridge shotguns were break actions, and all the shell really needed to do was hold the shit in front of the powder. Paper was good enough for that. Then the magazine tube was invented.

Just the same as the lever action rifle, the shotguns all went tube fed. There were full brass shells as well, but paper held up just fine in magazine tubes, and even automatic shotguns.

When plastic became the thing, shells went from wax paper to plastic. We have not really gone much further than this, because it just kind of worked.

Now they make extra hard plastic and full brass shells designed for magazine fed shotguns, but they could take a while to catch on.

TL:DR, history of shotgun shell.

>>33556700
Even ten rounds in a lighter package would make it easier to wield and swing that gun to target a bit faster. When fractions of a second count.
Even with a plinky .22 or .380 shot placement counts.