Concept Rifle

[The6thMessenger]

Hello, i have an idea.

What if there is a rifle, with 40 inch smooth bore barrel. But fires teflon-coated 300 grain fin-stabilized slugs that imposes spin only after leaving the barrel, with 205 grain of propellant.

What will be it's speed, would it reach 6000 feet per second muzzle velocity?

 

[rcmodel]

No.

If it were a conventional size rifle, using 1/3 pound of powder behind a 300 grain bullet?
Assuming all the powder could burn fast enough in a 40" barrel?
It would blow up.

Plus if it didn't blow up?
The recoil of a 10 pound rifle would be deadly on both ends, at nearly 180 FPS rearward recoil velocity, and over 5,000 ft/lb of energy at the butt plate.

The other thing is, spin stabilization fins can only work if there is laminar air-flow past the fins.
At the speed of sound, or nearly six times that as you propose?
The supersonic shock wave coming off the projectile nose would prevent any laminar air flow past the fins to cause any spin.

BTW: Congratulations on your first post.

rc

 

[alfon99]

5,000 ft/lb of energy at the butt plate.

A good quality recoil pad will do the job

 

[EchoM70]

205 grains of powder isn't 1/3 of a pound considering there is 7,000 grains in a pound.


Everything else RC mentioned is pretty spot on, just too unrealistic.

 

[rcmodel]

Thats not what it said before he edited his post 10 minutes after he posted the question.

It said 2,700 grains or something like that when I did the rough math in my head.

I know how many grains are in a pound.

rc

 

[back40]

It did say 2700 grains of propellant

 

[The6thMessenger]

There was this issue with the reentry of space shuttles, that pointed nose would burn the wings because of the air friction in the wings. So they made the nose balled.

So, does an extremely pointed nose would work?

And yeah, only 205 grain propellant. I miscalculated the first time.

 

[Sibir]

Sounds like a scaled down M-1 tank main gun. It wouldn't be a rifle since it is a smoothbore.

 

[HoosierQ]

Well...at least it was a change from the "What would be a better rifle for the troops than the AR-15 pattern?" thread that we've seen so often.

 

[HOOfan_1]

Sounds like a scaled down M-1 tank main gun. It wouldn't be a rifle since it is a smoothbore.

The M256 gun on the M1A1/A2 shoots kinetic energy rounds at around 5,500 FPS. Smooth bore creates a good seal and doesn't spin the projectile because apparently the kinetic energy rounds are too long for a realistic spin stabilization.

They are fin stabilized, but I do not believe they spin.

Supposedly barrel life is under 500 rounds though.

 

[yzguy87]

Welcome to THR.

Out of curiosity, what concept do you have in mind for this type of info?

 

[The6thMessenger]

I don't know, spur of the moment.

I was thinking of single-shoot breech loading rifle like this: http://img2.wikia.nocookie.net/__cb20090606224415/half-life/en/images/5/5e/Sniperw.png

but then i'm just really in the theoretical concepts.

 

[Panzerschwein]

I don't think it will go that fast. Unless it's some very specialized propellant.

 

[alfon99]

I don't know, spur of the moment.

I was thinking of single-shoot breech loading rifle like this: http://img2.wikia.nocookie.net/__cb20090606224415/half-life/en/images/5/5e/Sniperw.png

but then i'm just really in the theoretical concepts.

Is that from a videogame of some sort?

 

[armoredman]

Build it and see what happens. The world of the weird wildcat is where new ideas are born and tested.

 

[HOOfan_1]

Is that from a videogame of some sort?

Half-Life is in the url. I don't recognize that from Half-Life though

 

[John C]

The M256 gun on the M1A1/A2 shoots kinetic energy rounds at around 5,500 FPS. Smooth bore creates a good seal and doesn't spin the projectile because apparently the kinetic energy rounds are too long for a realistic spin stabilization.

They are fin stabilized, but I do not believe they spin.

Supposedly barrel life is under 500 rounds though.

It's been a few decades, but as I recall, each type of round had a "round equivalent" value to it. I distinctly remember that TPT (target practice training) rounds were like 1/10 of a full warhead. HEAT rounds were less than APFSDS-DU rounds.

Perhaps, in this theoretical rifle, the rounds would be more like TPT than APFSDS-DU rounds.