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From what I've read, the slugs in an Autogun has a caliber of 8.25. The closest real life bullet I've found is this one.
The bullets go out the barrel (what's it called?) at 820 m/s, and it fires at 650 rpm. Any suggestions?

The closest I could think of the AK-47. It has a RoF of 600rpm and muzzle velocity of 715.

Caliber is 7.62x39mm

It's a bit hard to find a real life equivalent, as it's a fictional weapon. You can get close though.

Maybe the H&K G3?

NauticalKendall wrote:
Maybe the H&K G3?

Thanks!

Muzzle velocity is 800, so it's a closer fit, yes.

AK-47 or M14 would probably be the closest match, but in practical terms just about any modern day battle rifle or assault rifle would do.

The closest thing we have to them are some bolt action sniper rifles. They fire 8.25 long, which would be fething huge compared to 5.56, and noticeably larger then 7.62.

Also, given the word "long", it sounds like they fire magnum rounds.

The kick from an autogun must be insane.


Automatically Appended Next Post:

chaos0xomega wrote:
AK-47 or M14 would probably be the closest match, but in practical terms just about any modern day battle rifle or assault rifle would do.

Most western rifles besides the HK-17, M14, and SCAR-H fire 5.56. 8.25 is far larger, and it sounds like they're magnum rounds, so, quite a bit more powerful.

 Wyzilla wrote:
The closest thing we have to them are some bolt action sniper rifles. They fire 8.25 long, which would be fething huge compared to 5.56, and noticeably larger then 7.62.

Also, given the word "long", it sounds like they fire magnum rounds.

The kick from an autogun must be insane.

Well, Chaos is insane.

 Matthew wrote:

 Wyzilla wrote:
The closest thing we have to them are some bolt action sniper rifles. They fire 8.25 long, which would be fething huge compared to 5.56, and noticeably larger then 7.62.

Also, given the word "long", it sounds like they fire magnum rounds.

The kick from an autogun must be insane.

Well, Chaos is insane.

What the hell does Chaos have to do with the standard Imperial Auto-Guns?

 Wyzilla wrote:
The closest thing we have to them are some bolt action sniper rifles. They fire 8.25 long, which would be fething huge compared to 5.56, and noticeably larger then 7.62.

Also, given the word "long", it sounds like they fire magnum rounds.

The kick from an autogun must be insane.


Automatically Appended Next Post:

chaos0xomega wrote:
AK-47 or M14 would probably be the closest match, but in practical terms just about any modern day battle rifle or assault rifle would do.

Most western rifles besides the HK-17, M14, and SCAR-H fire 5.56. 8.25 is far larger, and it sounds like they're magnum rounds, so, quite a bit more powerful.

There are two dimensions that you have to concern yourself, length and width. A 9mm Beretta fires a 9x19mm round, which is far wider than the standard NATO 5.56x45mm round, but also far shorter and far less powerful. Without knowing the length on the 8.25 autogun round itd be hard to say how powerful it is relative to anything else.

Also, the key word is "in practical terms". There is a world of difference between a 5.56x45 and a 7.62x39, but unless youre truly a gun afficionado you will most likely never really notice it. Both will give whatever is on the receiving end of the shot a pretty bad day.

 Wyzilla wrote:

 Matthew wrote:

 Wyzilla wrote:
The closest thing we have to them are some bolt action sniper rifles. They fire 8.25 long, which would be fething huge compared to 5.56, and noticeably larger then 7.62.

Also, given the word "long", it sounds like they fire magnum rounds.

The kick from an autogun must be insane.

Well, Chaos is insane.

What the hell does Chaos have to do with the standard Imperial Auto-Guns?

Renegade Militia.
Awww yeah.

chaos0xomega wrote:

 Wyzilla wrote:
The closest thing we have to them are some bolt action sniper rifles. They fire 8.25 long, which would be fething huge compared to 5.56, and noticeably larger then 7.62.

Also, given the word "long", it sounds like they fire magnum rounds.

The kick from an autogun must be insane.


Automatically Appended Next Post:

chaos0xomega wrote:
AK-47 or M14 would probably be the closest match, but in practical terms just about any modern day battle rifle or assault rifle would do.

Most western rifles besides the HK-17, M14, and SCAR-H fire 5.56. 8.25 is far larger, and it sounds like they're magnum rounds, so, quite a bit more powerful.

There are two dimensions that you have to concern yourself, length and width. A 9mm Beretta fires a 9x19mm round, which is far wider than the standard NATO 5.56x45mm round, but also far shorter and far less powerful. Without knowing the length on the 8.25 autogun round itd be hard to say how powerful it is relative to anything else.

It's described as 8.25 long, not short. Given that the standard round of the world, 7.62, is 39mm long, the Imperium's 8.25 caliber is probably over that number getting into magnum territory.

Because in 38,000 years the concept of long and short will be the same as it is today. Yup, whatever.

As a side note, long and magnum are not unterchangable, magnum rounds tend to be more powerful. Long is also typically used to describe handgun rounds or handgun rounds designed for use in rifles, rather than actual rifle cartridges. I.E. they tend to be less powerful than a true rifle cartridge.

It is worth considering though that even today, there's some pretty funky recoil minimizing systems under production, not so much with standard infantry rifles, "Remember, your rifle was built by the lowest bidder" and all that, but there's all sorts of tricks one can do with gas blowback and whatnot to make firing a 7.62x39 as simple as a .22 sport pistol.

Now, granted, the Imperium isn't known for being "high-tech," but that's all relative to an environment where one has 65 million year old angry robots and starships which dwarf small continents grown into existence. I'm pretty sure these high calibre autoguns have decent recoil mitigation.

Where did you read this 8.25mm stuff?

All the old fluff about Autoguns just described it as a standin for any number of countless styles of small to intermediate caliber auto-fed rifles.

 MajorStoffer wrote:
It is worth considering though that even today, there's some pretty funky recoil minimizing systems under production, not so much with standard infantry rifles, "Remember, your rifle was built by the lowest bidder" and all that, but there's all sorts of tricks one can do with gas blowback and whatnot to make firing a 7.62x39 as simple as a .22 sport pistol.

Now, granted, the Imperium isn't known for being "high-tech," but that's all relative to an environment where one has 65 million year old angry robots and starships which dwarf small continents grown into existence. I'm pretty sure these high calibre autoguns have decent recoil mitigation.

IIRC there's an aussie company that made a 7.62 battle rifle that has zero recoil. I forget was it was called, but the video was incredibly impressive.

^What Veteran Sergeant said.

 Veteran Sergeant wrote:
Where did you read this 8.25mm stuff?

All the old fluff about Autoguns just described it as a standin for any number of countless styles of small to intermediate caliber auto-fed rifles.

Imperial Armor.

 Veteran Sergeant wrote:
Where did you read this 8.25mm stuff?

All the old fluff about Autoguns just described it as a standin for any number of countless styles of small to intermediate caliber auto-fed rifles.

HERE!

Calibre: long 8.25
Feed: 20 or 30 round box
Cyclic rate of fire: 650 rpm
Muzzle velocity: 820 m/sec

Going purely from 8.25 long doesn't describe length at all, if you look at it from a real world ammunition standpoint. 8.25 is the caliber, and long is a descriptive. Much like the .32 Long in handguns now. The cartridge isn't .32 long its .32 caliber diameter.
So basic math would give roughly around a 33 caliber, so perhaps something like .338 Win, or something like that. The "Long" descriptive is often used in handgun cartridges so I would assume this would be a fairly low recoil round, especially if muzzle velocity is only 800 m/s. That's relatively average muzzle velocity for a rifle round.

Going by these figures, somewhere between AK-47 7.62x54R and its big brother 7.62x54R, with a slight diameter increase.

I'm not entirely sure if there would be a modern equivalent for something like that, simply because it would be silly. The weight of the weapon and the ammo (assuming the round is basically a .338 winchester) alone would make it impracticable as a standard infantry weapon. Also, unless the gun has one heck of a recoil suppression system, that bad boy would kick like an angry bull.

If you wanted something close though, I would imagine an HCAR would get you into the ballpark. 30 round mags of 7.62x63mm, a hydraulic recoil suppression system and heavy enough you could probably beat a bear to death with it. Pretty sure it would put a fair few holes through some orks if you really needed it.

EDIT: As far as I can tell, it fits the muzzle velocity and rpm profile just about dead on. Gunna be a tad smaller though.

I would guess that with the long descriptive, it would be more like a .32 caliber handgun round. Weak and highly ineffective.

Here you go...
Beowulf http://i157.photobucket.com/albums/t77/porterj0117/50beowulfm4.jpg

even has a cooler name..I fired one before..not to bad..would not want to empty a magazine of them in a burst though

 Wyzilla wrote:

 Veteran Sergeant wrote:
Where did you read this 8.25mm stuff?

All the old fluff about Autoguns just described it as a standin for any number of countless styles of small to intermediate caliber auto-fed rifles.

Imperial Armor.

Ahh. so just one specific type of Autogun. Makes more sense.

This variant of auto-gun does have a passing resemblance to the HK.

 Soo'Vah'Cha wrote:
Here you go...
Beowulf http://i157.photobucket.com/albums/t77/porterj0117/50beowulfm4.jpg

even has a cooler name..I fired one before..not to bad..would not want to empty a magazine of them in a burst though

Though I'd imagine that beautiful thing would be somewhat iffy at range. lol

I'm not sure is being caseless changes the recoil, as at least in the old days some Autoguns were listed as being caseless.

 AegisGrimm wrote:
I'm not sure is being caseless changes the recoil, as at least in the old days some Autoguns were listed as being caseless.

Newton's Third Law: You push me, I push you. If an gun flings something than that gun has recoil, so unless the rounds only use kicker chargers to get out of the barrel and then rocket off to a higher velocity, the recoil should be exactly the same.

Depends on if you think of it as a caseless or cased ammunition based weapon.

As a cased weapon, I'd suggest the AK47-- functional, primitive, and outclassed by newer guns, it's useful for its ease of manufacture, durability, and ease of maintenance.

As a caseless weapon, there's no equivalent.


Automatically Appended Next Post:

 AegisGrimm wrote:
I'm not sure is being caseless changes the recoil, as at least in the old days some Autoguns were listed as being caseless.

Caseless simply means there's no need for an ejector port, so theoretically it can have a higher rate of fire.

I always thought of auto-guns as .30 cal rifles of various makes and models. Or some futuristic combination of an AR and AK platform that shoots a .30 cal round.