How much powder does the .577 Nitro Express case take? I have read some were that the .585 NYATI is a short .577 NE

If the .577 NE take more powder than the .585 NYATI then it have more power. In a bolt action like the Heym Express rifle.

And how much powder does a .700 Nitro Express take? And the 50 BMG

Thanks...!

Overkill,
The 577 nitro was designed for low pressure loads in the old days for 2050fps with 750gn bullets.
The case can probably hold 10 or 20 more grains than the 585 nyati.Very rough guess.
Maybe 2600fps with 750gn max and 24" barrel.

Karl

Karl.

Do you think that the .577 NE is a better than the 585 Nyati? in a bolt action.

And what is your new big bore

You can send me a private message i want to know how big it is

I forget to ask one thing.

What action can take the .700 Nitro Express?

This question is not only for you Karl

A belive modified .50BMG single action could be enought

Overkill,
at LOADED pressure, not at maximum case, the 577 is loaded to like 135 gr of a certain powder, with 750gr bullets. The nyati uses that for a load. It's a question of pressure, as the nyati is (in essence) a shortened, derimmed 577, but the 577 is 3" and the 585 is 2.81". but, in a bolt gun, the 585 is loaded to 50k (or more) while the 577 should be more like 37k.
in practice, the 585 USES more powder.
jeffe

Overkill,

According to A2 manual

for the .557 NE with a 750 gr bullet in a 26" barrel

H4831 163 gr (max load) velocity 2128 fps
IMR 7828 167 gr (max load) velocity 2071 fps
RL 15 135 gr (max load) velocity 2081 fps

Hope this can help you.

:
How much powder does the .577 Nitro Express case take? I have read some were that the .585 NYATI is a short .577 NE

If the .577 NE take more powder than the .585 NYATI then it have more power. In a bolt action like the Heym Express rifle.

And how much powder does a .700 Nitro Express take? And the 50 BMG

Thanks...![/QUOTE]

Then the .585 Nyati have more power. If it can handle a higer pressure.

But I am still thinking about the .700 NE does the case take more powder than the 50 BMG case?

My point with that is...

Can a opened 50 BMG case to caliber .700 shoot a 1000 grainer faster than a .700 NE..

Thanks....!

Overkill,
Then the .585 Nyati have more power. If it can handle a higer pressure.
[/QUOTE]

Don't know about pressure for the .585 Nyati but pressure for .577 NE are :

between 27600 PSI and 34600 PSI

Yes a .700 rimmed case can be used with .50 BMG action although the boltface will need to be modified. There have been a few built and I'm told that there have been big problems with ign ition. Guess why a .50 BMG uses a special primer? A federal 215 just doesn't have the poop to ignite over 200 grs powder. The .700 BMG Improved, obviously can eliminate these problems and can hit over 3000fps with a 1000 gr bullet.-Rob

Robgunbuilder...!

Were do you find cases and primers to a 700 BMG And what action will take a cartridge like that a 50 BMG action or what. And how many rounds can the magazine take in a rifle like that...?

Thanks...

Robgunbuilder...!

Please give me all info you have on the 700 BMG.

You would need to fireform standard .50 BMG cases to the .700 BMG Improved. This means you will need a rifle chambered for the cartridge first. I believe all the data on this cartridge is available at the FCSA web site. Any action capable of taking a .50 BMG would work. Mcmillan repeater actions hold 2 or 3 down. Standard CCI .50 BMG or RWS primers will work. Are .700's legal in Sweden? That is a problem here.-Rob

The 577 nitro on a bolt action can operate at the same pressure as the 585 nyati which is the same as maximums for other calibres these days.

Overkill, i would prefer not to send you any private messages or emails since the last time I wasn't fast enough in answering a young scandinavians questions, I found my hotmail account broken into and flooded with shit.

I'm sure you and per577 know nothing about that...but I won't take any chances, no offence.

In answer to your question I would prefer the 577 nitro of course since it is a classic cartridge if not classic in a bolt action. But it is not designed for boltactions due to its rim.

Karl.

Robgunbuilder...!

Do you know the adress to FSCA web site and to Mcmillan...?

I dont know how big calibers we can have for hunting here in sweden. I know one man that was trying to get a 50 BMG for hunting but he did not get it for hunting.

And I am just thinking about a .700 BMG and 600 NE and .585 NYATI I am not going to buy one before I have enough money ��� ��� maybe in year 2005 or some thing.

Overkill, if you want powerfull ".700", look at 14.5x114 Russian. Nice round, "modern" construction, over 30 000J muzzle energy. If 20mm is minimum, go for 20x139 - 119g bullet at 1100 m/s, so about 70000J muzzle energy. When 30mm, so 30x210 Czech AAA, 435g bullet at 997m/s muzzle, so over 210 000J, but real big bore is only 35x228, 550g bulelt at 1175m/s, it over 370 000J muzzle energy. I belive it could be max what you can handle


From left to right: 25mm Soviet 2-M3 (25x218), 30mm Soviet NN-30 (30x210), 20mm Vulcan (Phalanx) (20x102), 25mm
Oerlikon KBB (25x184), 30mm Russian AO-18 (30x165), 30mm GAU-8/A Goalkeeper MPDS (30x173), 35mm Oerlikon
(35x228), 40mm Bofors L/70 (40x364)

Jiri

[ 07-02-2002, 15:42: Message edited by: Jiri ]

Jiri...!

That is a little to big for me...

Overkill !
I think you'd never go further, when shooting the .505 Gibbs loaded at it's max in modern cases, then you don't want the .585 ,.600 ,.700 rifles anymore.570 grain bullet at 2600+ fps in a rifle of reasonable hunting weight would change your mind in a minute !!!!

OOOHH !! i FORGOT TO TELL THAT I'M PLANNING TO GET A .505 GIBBS IN THE HEYM BOLT ACTION.IT'S HALF THE PRIZE THE .577 NE AND THE .600 HEYM BOLT RIFLE, THE BARREL WILL BE 25 INCHES LONG.

Per577..!

Trust me I know what recoil is every time I shoot my .460 Wby

The Heym Express rifle is a fine rifle. A 505 GIBBS will beat my .460 A 570 grain bullet at 2600 f/s is a hard hit.

Do you know what a Heym Express in caliber .600 NE costs...?

At SCI, Heym said that their bolt rifle in 600 NE cost US$12,000.

Overkill another rifle you might be interested in is the Boyes .55 caliber anti tank rifle. Take a look on the military forum they sell for around 3-4000 Aus$ second hand. I have no idea how they shoot however.

Jeffeso surely someone who was good on a lathe could make a set. That price seems crazy, .50 BMG dies would be around the same size and there not that dear.

Why don't you get a copy of the book "Shooting The British Double Rifle" it contains all the information on how to load the big cartridges and over coming the ignition problems the auther is Gaeme Wright.

Jeffeso I saw one at a gunshow in Melbourne earlier in the year, they were asking 3500Aus$ for it and there was a bloke who makes a living selling reloaded ammo who was selling ammo for it at $7.00 a pop If I remember correctly, the only downside is the mag is on top and the sights set of to the side. There a primitive looking thing but they would be a little bit of fun.