Could anyone tell me if it is possible to have a .700 NE in a rimless belted version,built ?
Have it already been done ?

Per"can't get enough"

Per577...!

I think that the primers like federal 215 and similar dont burn all the powder in the case. Saeed put 5 grain bullseye or what it was on the bottom on his .700 NE case. So I think that it has to be 50 BMG primers to burn all the powder. That is why a .700 BMG IMPROVED would be good.
I think that the .600 Overkill has a MAX powder charge for standard or magnum primers. But Robgunbuilder knows more about this...!

The .700 N.E. cartridge from the German Manufactor W. Romey use .50 Browning primers since years, because of ingnition Problems with the large rifle magnums.
regards
Robert

Well, i appreciate your answers,but i still would like to know if this is a possibility(to make),and what ballistics one could expect ?!

Ok, I'll take a shot.

1200 grains at 2600 fps at 58,000 psi, using a 32 inch barrel.

I think Dave at C&H tool and die built a .700 belted magnum by swaging a belt onto a .50BMG case. I see no reason why you could not have such a case made with a belt or even solder on a belt. The .700 improved developed by Monte Kyser uses a .050 shoulder to headspace against. Both cartridges use .50BMG primers for ignition and I suspect you would need a .50 BMG action or some type of single shot to make either work. If memory serves, Monte got over 3000fps with a 1000 gr. DKT bullet and something like 2200fps with some custom 1900gr bullets. I think he started out with a 32 inch barrel and then cut it back to 26 inches. Recoil was stout!-Rob

Thank you Robgunbuilder and 500 grain.
The reason i mentioned .727 Rimless belted cartridge based on the .700 Nitro Express is that the case is for 'hunting' and not punch through tough material(Yes the .700 Improved could really serve as an anti-material gun pushing 1000 grainer to over 3000 fps,,and with the right bullet !.
Of course i would set at the .700 Imp, when it's talk about power,,but it seems unlikely to get one(just assumptions)since it would become bit of a problem to explain why i would want one,to the authorities,,then a more "traditional looking cartridge" would be of less concern. And it would fit just under the 'hunting' category.The .700 Imp is a military one ,,therefore,more difficulties. To end this dialog,,i'm really not sure what would be the best option between those monsters,and i would like some norwegians to say a couple of words about geting permission to buy such a thing !?

Robgunbuilder...!

What action will really take a .700 BMG IMPROVED cartridge...? The MC MILLAN repeater action will take it or what?? But how will the gun look like?? Like a big target 50 BMG???

OverKill,

The mcmillan action will take it since it is based on the 50 bmg case. But the mcmillan action is ugly, and the rifles based on it are unweildy and unsightly.

Let's see how folks stand up to the recoil of the .620 overkill before stepping up to a .700 rimless.

But if you want, you can build a .700 Nitro Express on a 50 BMG action and load it hot. Saeed has some video clips of a gentleman shooting one on this website. It looks like its really not bad at all.

Remember the .700NE is a rimmed case and it's not so simple to adapt a Mcmillan .50BMG Boltaction to a rimmed case. In fact it's not simple to get any rimmed case to feed through a bolt action as countless people who have tried to adapt Siamese Mausers to 45-70's have learned the hard way! Using a single shot action doesn't make these problems go away. The Mcmillan bolt rim would have to be nearly entirely removed( but leaving a small section intact for cartridge ejection control and the Sako type extractor would have to be extensively modified and the barrel cut for an extractor groove. I have thought long and hard about this and looked at a bunch of possible actions and options. While it can be done, IMHO it's far, far more complicated than building a .700 Improved on the .50BMG case using an action that will easily feed three down in the mag. It doesn't even have to be ugly if you make a stock that hides the magazine! There is also no comparison with respect to costs and power. .50BMG brass is cheap and .700NE is not! Depending on the burn rate of the powder you use, a .700 Improved can perform at the .700NE level or go way beyond it! if you have ever seen a .700 Improved case, it bares only a slight resemblence to a military cartridge. As others have noted, the .700 either needs a .50BMG primer for ignition ( It's not so simple to convert these cases either) or a priming dose of bullesye or it won't go bang reliably.
With that said, a scaled up single shot action designed like a Hall or even a beefed-up Sharps(I've seen a custom one and have given serious thought to building one myself) would be pretty neat in a .700 NE.
The use of a belt for headspace control probably reaches its practical limit with the .600 RGB/Overkill as anything larger than this needs a .50 BMG action and your way better off with a .50BMG based case at this point unless you have a hand-made one of a kind action built! Anyway that's my two cents worth. -Rob

[ 09-13-2002, 01:28: Message edited by: Robgunbuilder ]

Rob & 500,

I would like a .700 BMG improved if it can be made to like a rifle should look like. How much bigger would it be than my 602 based .585 ??

Could you get away with say a 14-15 pound rifle with really good break ??

PC,

No one makes a normal looking 50 BMG action, so you would have to scale up a mauser from scratch.

Fred Wells of the Wells Sport Store in Arizona has done it. If I remember correctly from 3 years ago, he got about $15K for the action alone. He displayed a 50 bmg bolt gun he had built on a scaled up mauser action. If I showed you a photo of it, you probably could not distinguish between it and a model 98 in 458 win mag. But in person, the gun was scaled to fit a 10 foot tall man. It was perfectly proportioned and truly ridiculous. It weighed more than 20 pounds.

I am sure he could chamber the same thing in 700 rimless.

PC- the .700 Improved is a super cartridge. No doubt about it! If you do the math it's flexibility is incredible. Why do you say a Tactical Mcmillan is ugly? I disagree! It's no more ugly to me than a savage 110. These actions hold three down and one in the pipe and are no worse looking than any of the other Tactical rifles around.
In terms of gun weight I doubt that you can reach less than 20lbs realistically and I would not want to fire one less than than weight anyway. The old .600 Ne's and .577NE doubles weighed this much and nobody complained.
The next step up beyond the 585 NYATI just has to be a .700 Improved. You won't rest till you have one.-Rob

Robgunbuider !
The .700 BMG Improved sure is the ultimate rifle !
And did you say this thing was capable of 2980 fps with a 1000 gr.bullet,,and that from a 26 "
barrel,,Lord is that impressive, or what !
I get water in my mouth getting what will certainly be Norways most powerful handheld weapon !The .460 Weatherby is toppled from it's throne( been for a long time ).
Could you get some pictures of .700 IMP.with mcmillan stock, action and case dimensions(even tough you don't have pictures)??
Now i'm really confusius;
.585 Nyati
.620 RGB & Overkill
.585 Wells Express,Improved or Gehringer( Have to talk to Karl about this one,when he's back)
.577 T-rex (Want this very much,,but .620 has come)
.600 BMG IMP.(Too big for the "moment")
.700 BMG IMP.(Too big for the "moment")
.475 A&M Magnum(To reach 2700+ fps safely,with 500 gr.bullets)
.500 A2,.505 Gibbs,.500 AHR.(Gibbs looks impressive and define myths,power,symbolize african big game hunting as modern cartridges never could do)
.460 Weatherby Magnum(with darth Vader look)
Longbob got 2685 fps with 113 gr. of imr-4320, and 500 gr.FMJ,,123gr. of imr-4350, and 2660 fps !
I think for the moment that .620 RGB is most facinating,,and the thought of 920 gr. bullets to 2400+ fps makes my shoulder crimp !!

Yeah your right Rob, the next step up for me has to be the .700 BMY improved. To be honest I do noy feel that my 13 pound .585 is that much of a hassle weight wise as it is well balanced.

I like to pick up my .416 after handling the Nyati and it feels like a toy it's so light. Funny thing is it used to feel really heavy.

500 I would love to have a scaled up mauser action !!! but 15K US is like 30 K Aus !!!

Rob it's not that tactical rifles are ugly it's just that a .700 improved will be fireing big woodleigh round noses and for me round nose bullets means traditional stocks & looks. I suppose my stock maker could just make me a giant weatherby style stock to match my .585.

I am thinking that my .700 improved will have a 1.3" barrel at the muzzle. Rob honestly regarding weight with a really good break surely you could get away with a 16-17 pound rifle ???

What actions did the Germans use in WW2 for their big anti tank rifles?? What action was the British Boys (sp?) anti tank rifle based on?

Per577...!

The .700 BMG IMPROVED is the biggest shoulder fired rifle I think???

If you have 28" Barrel you can load a 1000 grain woodleigh SP bullet at over 3000 fps... But that bullet will not have a good penetration but it will sure have a good splash effect. I think that Hawk bullets will make a special 1200 grain SP bullet in caliber .700 it will hold togheter much better and expand to a big diameter. I think you can load it to around 2500-2700 fps... www.hawkbullets.com/custom.htm

Robgunbuilder...!

I agree with you. I will not shoot a .700 BMG IMPROVED if it not have a weight at over 20 ibs. How would a .700 BMG IMPROVED look like? with the MC MILLAN action??