Questions concerning revolver

[bbson john]

Why most large, powerful rounds are implemented on revolver, but not semiauto pistol?

Why revolver is more accurate than semiauto pistol?


Thanks for answers in advance.

 

[lePobz]

I think the firing mechanisim in the semi auto pistol isnt capable of supporting the massively powerful rounds from revolvers.

 

[The Monkey]

 

[leib10]

Because a semi-auto handgun has more moving parts, and those parts are more prone to stress, wear, and breakage than a revolver, while also having to be made heavier.

Revolvers are not automatically more accurate than semi-autos, though.

The Desert Eagle can handle .44 Magnum and .50 AE, but is so big and heavy and cumbersome that few people can realistically carry them. As any LEO or soldier will tell you, 90% of the time it boils down to shot placement, not how big the bullet is.

 

[Beerdude26]

A FN Five-Seven has 20 rounds of 5.7x28mm and is able to pierce military-grade kevlar armor at ranges of 100m while only weighing 760g (including magazine).

Big rounds are usually used for game hunting methinks or for sniper rifles

 

[Dalamari]

Because The Beatles had just begun experimenting with drugs and other instruments in the studio, so they had to divide the songs over Rubber Soul and Revolver.

 

[leib10]

A FN Five-Seven has 20 rounds of 5.7x28mm and is able to pierce military-grade kevlar armor at ranges of 100m while only weighing 760g (including magazine).

Big rounds are usually used for game hunting methinks or for sniper rifles

True that the 5.7x28 has good armor piercing capabilities, but from what I've heard the terminal ballistics are something to be desired.

 

[Beerdude26]

True that the 5.7x28 has good armor piercing capabilities, but from what I've heard the terminal ballistics are something to be desired.

There are three basic classes of bullet:

* those designed for maximum accuracy at varying ranges
* those designed to maximize damage to a target by penetrating as deeply as possible
* those designed to maximize damage to a target by deforming to control the depth to which the bullet penetrates.

Which one do you mean?

 

[Terminator]

Why most large, powerful rounds are implemented on revolver, but not semiauto pistol?

Because automatics have to have a lock up system that reciprocates with every shot to chamber a new round, rounds over a certain size are not suitable for automatics unless a special lock up system is employed, such as a gas operated rotating bolt system in the desert eagle for .357 mag and .50 ae rounds which is bulky, there are a few autos chambered for larger rounds but most tend to be fairly impractical (a DE holds 7 x .50, a glock 17 holds 17x9mm)

Why revolver is more accurate than semiauto pistol?

The barrel is in a fixed position to the whole frame (where the sights are), as long as the chamber/barrel interface is manufactured to high tolerance revolvers give a very consistent force on the bullet, in certain automatics accuracy can be badly affected by changes in ammunition o/a length etc.
There isn't that much between a modern auto and a revolver however, it's mainly down to the ammunition and 'pointability' of the gun, which revolvers tend to be better especially with longer barrels.

 

[leib10]

Which one do you mean?

I'm saying that the bullet tends to lose a lot of energy when going through armor, which greatly lessens its lethality.

On the plus side, the round has about 30% less recoil than a 9mm, has a flatter trajectory, is generally more accurate, and against unarmored targets will usually dump some of its energy into the target, although it has little fragmenting tendencies like the 5.56x45.

The only thing I didn't like about the round was one of the weapons that used it. I fired a PS90 (civilan semi-auto only version of the P90) a couple months ago, and I must say I wasn't impressed with the overall design (the other weapon, the Five-Seven, is a sweet pistol).

 

[bbson john]

Because automatics have to have a lock up system that reciprocates with every shot to chamber a new round, rounds over a certain size are not suitable for automatics unless a special lock up system is employed

Is it that the bullet is too big so it takes more time for it to roll to the chamber?

in certain automatics accuracy can be badly affected by changes in ammunition o/a length etc.

?

 

[co05]

It's probably easier to fit larger rounds in a revolver since the ammo sits in the cylinder that lies atop the hand rather than automatics that hold all the rounds in a magazine in the grip.

I'm fairly certain that ergonomics play a big role in it.

 

[co05]

Big rounds are usually used for game hunting methinks or for sniper rifles

Ya can't have the round too small or else it won't provide enough stopping power.

 

[leib10]

Is it that the bullet is too big so it takes more time for it to roll to the chamber?



?

No, that's not it. It's the fact that the round has more powder in it, which releases higher amounts of energy and superheated gas when fired, which in turn requires a more powerful and secure locking system to keep the handgun from being blown apart.

I'll post more on this tomorrow, I'm too tired to do it now.

 

[Beerdude26]

The only thing I didn't like about the round was one of the weapons that used it. I fired a PS90 (civilan semi-auto only version of the P90) a couple months ago, and I must say I wasn't impressed with the overall design (the other weapon, the Five-Seven, is a sweet pistol).

Yeah the PS90 is so gimped it's not even funny

 

[leib10]

It's probably the single most uncomfortable shoulder-fired weapon I've ever shot. You have to crane your neck down in a most uncomfortable position to even line up the sights. And don't get me started on that little thumbhole that passes as a "grip". The magazine, while holding 50 rounds, will dump its contents if handled incorrectly. The trigger pull is not very good either.

Overall, the only advantage the P90 has over the MP5 is magazine capacity and a round that has better armor piercing capabilities. I've shot a FA MP5, and that thing is damned sweet. From my limited experience with the P90, and from my more extensive experience with the MP5, I'd take the MP5 over the P90 any day of the week. :cheese:

 

[Beerdude26]

They mainly needed a shorter version with more stopping power, which is what it's supposed to be used for. Of course, that doesn't stop people from using it for other stuff In fact, the P90 is often used by police agencies, SWAT teams and private companies, while it was designed for paramilitary use.

 

[leib10]

Actually, the P90 has not been as widely adopted as its main competitor, the MP5, for a number of reasons. It uses unique and expensive ammunition that is not widely available in a lot of configurations. This drives the logistics people crazy, and is probably the number one reason why it hasn't been more widely adopted. It's expensive, and most LE agencies and militaries are going the AR route anyway or already have MP5's, therefore negating the need for a new weapon to place a burden on the logistics situation. Most users are familiar with and prefer the MP5's basic design over the P90's. The P90's newest competitor, the MP7, is already taking off rapidly in the Bundeswehr and has already been adopted by several other forces, including the Norwegians.

Overall, I think that the MP7 is a more flexible weapon than the P90 because it can be fired as a large pistol in one hand, or it can be fired from the shoulder with the stock extended, thus greatly increasing its accuracy. The Bundeswehr has decided to replace the P8 (German military version of the USP) with this weapon in some roles. Its projectile also has all the body armor penetrating abilities of the P90, while reportedly having superior stopping power.