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Shooting & Reloading - Mausers, Big Bores and others >> Rifles

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dotchicco
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Re: 7x66 Vom Hofe Super Express. [Re: sbs470]
      #319518 - 01/09/18 02:29 AM

After all... its accuracy is superb.




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dotchicco
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Re: 7x66 Vom Hofe Super Express. [Re: dotchicco]
      #320098 - 27/09/18 02:41 AM

After few weeks of experiments: obtaining brasses from .28 nosler is an hard way. It's a long work that includes working on the rim diameter to reduce it, shortening the total lenght and moving down the shoulder. My council is to try to find original brasses until it's possible. I have made 3 brasses in total from 28 nosler, with an high dispersion of time. After all this could be the last way to use your gun without original brasses. Go for Gehmann brasses if you can.
Doc


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rigbymauser
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Re: 7x66 Vom Hofe Super Express. [Re: dotchicco]
      #320249 - 01/10/18 10:05 PM

Thanks Dotchicco.

I have long claimed the .28Nosler was a direct copy of the 7x66VH.

The 7x66 is a powerhouse when loaded to its full potential. 160grain 3280 ft/sec...


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dotchicco
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Re: 7x66 Vom Hofe Super Express. [Re: rigbymauser]
      #320265 - 02/10/18 03:35 AM

HERE WE GO!

7x66 Vom Hofe (on the left) VS .26 Nosler









Doc


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dotchicco
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Re: 7x66 Vom Hofe Super Express. [Re: dotchicco]
      #321832 - 25/11/18 09:39 AM



A good group of 3 bullets, 100 meters.
Rws kegelspitz bullet, MRP powder.
I'll try these on fallow deers this winter.
Doc


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tinker
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Re: 7x66 Vom Hofe Super Express. [Re: dotchicco]
      #321833 - 25/11/18 11:05 AM

Very nice!

--------------------
--Self-Appointed Colonel, DRSS--



"It IS a dangerous game, and so named for a reason, and you can't play from the keyboard. " --Some Old Texan...


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Waidmannsheil
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Re: 7x66 Vom Hofe Super Express. [Re: tinker]
      #321835 - 25/11/18 12:49 PM

Can't complain with that group. A friend of mine has used the 127 grain RWS Cone Points for years from a 6.5x55 and has never needed more than one shot on dozens of Fallow deer that he has taken. Make sure you let us know how you go. Good hunting.

Matt.

--------------------
There is nothing wrong with vegetarian food, so long as there is meat with it.


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DarylS
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Re: 7x66 Vom Hofe Super Express. [Re: Waidmannsheil]
      #321844 - 26/11/18 12:37 AM

That's wonderful accuracy from a huge cased 7mm. Thanks for posting.
I wish my heavy barreled .22-250 shot that well.

--------------------
Daryl


"a gun without hammers is like a Spaniel without ears" King George V


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93x64mm
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Re: 7x66 Vom Hofe Super Express. [Re: DarylS]
      #321856 - 26/11/18 07:20 AM

Top stuff Doc!
Good load there mate - could you let all know it's details please?
Cheers
93x64mm


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dotchicco
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Reged: 16/11/16
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Loc: ITALY
Re: 7x66 Vom Hofe Super Express. [Re: 93x64mm]
      #321874 - 26/11/18 09:16 PM

SURELY I CAN!

I have used RWS Kegelspitz bullet (162grains) propelled by 75,5 grains of MRP powder, Original Vom Hofe brasses.
COAL 85mm, 960ms of velocity, 4860 joule of energy.
Estimated pressure is 4300 bar. So this is a good load for winter hunting, not to use in summer or in hot temperatures.
Doc

Edited by dotchicco (26/11/18 09:18 PM)


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93x64mm
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Re: 7x66 Vom Hofe Super Express. [Re: dotchicco]
      #321893 - 27/11/18 07:16 AM

Yeah I wouldn't want to get it much hotter, 4300 bar = 62366 PSI
She's a hot load Doc!
And in both sense of the word, a 160gn pill at 3150fps......smokin'!
Ripp must be drooling everywhere by now!


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Rule303
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Posts: 4896
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Re: 7x66 Vom Hofe Super Express. [Re: 93x64mm]
      #321897 - 27/11/18 09:17 AM

Quote:

Yeah I wouldn't want to get it much hotter, 4300 bar = 62366 PSI
She's a hot load Doc!
And in both sense of the word, a 160gn pill at 3150fps......smokin'!
Ripp must be drooling everywhere by now!




Agree. Especially about Ripp.

Doc that is a very good rifle and cartridge. Shoots like stink, whats not to like.


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dotchicco
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Reged: 16/11/16
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Re: 7x66 Vom Hofe Super Express. [Re: Rule303]
      #321912 - 27/11/18 10:27 PM

It's really a powerhouse! Using the N560, slower powder than the MRP, is possible to obtain a velocity around 990 ms with the KS bullets with an energy around 5100/5200 joule, 4300 bar of pressure,
(Something less with boat tail bonded bullets).
But in my opinion there is no reason to reach this velocity with a soft point bullets (the ks bullet is a cup/core bullet ) unless you have to shot a Gam at 400 meters. For my hunting territory it's more than enough. I can shot roe deer, fallow deer and wild boars up to 350 meters just aiming at the top of the shoulder... And the sectional density of 7mm 160 bullet is outstanding.
Doc


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dotchicco
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Re: 7x66 Vom Hofe Super Express. [Re: dotchicco]
      #323718 - 24/01/19 05:20 AM

[image][/image]

This load Works Superbly.
This Roeder was shot at 170/180 meters, just jumped and falled down.
Few meat damaged, really impressive terminal effect.
Doc


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DarylS
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Re: 7x66 Vom Hofe Super Express. [Re: dotchicco]
      #323719 - 24/01/19 05:31 AM

Well done, Doc.
Further, was thinking about your problems with altering the Norma brass.
If you had access to a .300 H&H FL sizer die, you could use that to push the shoulder back - only as far as needed for proper headspace. - AFTER annealing the case.
Then, when fireformed they would form perfectly.
The .300 has such a long taper in body and neck, this should be quite easy with this die and zero case loss in the process.
After getting the shoulder roughly where you need it with the .300 die, use your 7mm VomHoff FL die to neck for the 7mm bullet for a crush fit.
Your die will give you the shoulder necessary for proper headspace.
That is how I would approach the case making process without pain or extra expense.


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dotchicco
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Re: 7x66 Vom Hofe Super Express. [Re: DarylS]
      #323765 - 24/01/19 09:48 PM

It's a good Idea Daryl.
Thank you for suggesting.
I don't have 300 dies but a friend of mine should have.
I'll try this way.
Doc


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dotchicco
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Re: 7x66 Vom Hofe Super Express. [Re: dotchicco]
      #332396 - 16/09/19 02:16 AM

Good afternoon gentlemen,
Yesterday i had a good chance.
190 meters, Young fallowdeer, the only male between six females.
Hitted near the last left rib, bullet recovered under the skin of the right shoulder.

Ks bullet. This cartridge is outstanding...
Doc.

[image]

[/image]

[image]

[/image]

[image]


[/image]


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DarylS
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Re: 7x66 Vom Hofe Super Express. [Re: dotchicco]
      #332399 - 16/09/19 03:54 AM

Not much left of the bullet, but appears to have done the job.

--------------------
Daryl


"a gun without hammers is like a Spaniel without ears" King George V


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Louis
.375 member


Reged: 13/05/15
Posts: 977
Loc: France
Re: 7x66 Vom Hofe Super Express. [Re: DarylS]
      #332405 - 16/09/19 05:09 AM

Congratulations Doc, nice rifle, perfect shot and good fallow deer for the freezer.
Louis

--------------------
"Everything that doesn't kill me makes me stronger"


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Waidmannsheil
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Reged: 19/04/13
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Re: 7x66 Vom Hofe Super Express. [Re: Louis]
      #332411 - 16/09/19 06:54 AM

Well done, nice rifle and a nice shot.

Matt.

--------------------
There is nothing wrong with vegetarian food, so long as there is meat with it.


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NitroXAdministrator
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Reged: 25/12/02
Posts: 39059
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Re: 7x66 Vom Hofe Super Express. [Re: DarylS]
      #332418 - 16/09/19 01:24 PM

Quote:

That's wonderful accuracy from a huge cased 7mm. Thanks for posting.
I wish my heavy barreled .22-250 shot that well.




Daryl, my .375 H&H using RWS 300gr KS (conepoint) ammo shot like that. Good velocity as well. Unfortunately the bullets are crap on game IMO, so accuracy is not an issue. I did take some photos of the groups way back when, but never posted them. They might even have been on video.

--------------------
John aka NitroX

...
Govt get out of our lives NOW!
"I love the smell of cordite in the morning."
"A Sharp spear needs no polish"


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NitroXAdministrator
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Reged: 25/12/02
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Re: 7x66 Vom Hofe Super Express. [Re: NitroX]
      #332419 - 16/09/19 01:26 PM

I love the thought of the 7mm Vom Hofe Super Express.

Good to see one being used and posted about here on NE.

Well done, Dotchicco.

love the roe bucks as well.

--------------------
John aka NitroX

...
Govt get out of our lives NOW!
"I love the smell of cordite in the morning."
"A Sharp spear needs no polish"


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DarylS
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Reged: 10/08/05
Posts: 26413
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Re: 7x66 Vom Hofe Super Express. [Re: dotchicco]
      #332422 - 17/09/19 02:05 AM

Quote:

SURELY I CAN!

I have used RWS Kegelspitz bullet (162grains) propelled by 75,5 grains of MRP powder, Original Vom Hofe brasses.
COAL 85mm, 960ms of velocity, 4860 joule of energy.
Estimated pressure is 4300 bar. So this is a good load for winter hunting, not to use in summer or in hot temperatures.
Doc




dotchicco - please reduce your load. You do not need that much speed or energy to shoot deer or hogs for that matter.
4,860bar is 70,488.34pounds per square inch.
This is not necessary for any purpose.

--------------------
Daryl


"a gun without hammers is like a Spaniel without ears" King George V


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Rule303
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Reged: 05/07/09
Posts: 4896
Loc: Woodford Qld
Re: 7x66 Vom Hofe Super Express. [Re: DarylS]
      #332439 - 17/09/19 07:54 AM

Quote:

Quote:

SURELY I CAN!

I have used RWS Kegelspitz bullet (162grains) propelled by 75,5 grains of MRP powder, Original Vom Hofe brasses.
COAL 85mm, 960ms of velocity, 4860 joule of energy.
Estimated pressure is 4300 bar. So this is a good load for winter hunting, not to use in summer or in hot temperatures.
Doc




dotchicco - please reduce your load. You do not need that much speed or energy to shoot deer or hogs for that matter.
4,860bar is 70,488.34pounds per square inch.
This is not necessary for any purpose.




Daryl I think you have the muzzle energy (joule) and the chamber pressure (Bar) mixed up.


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dotchicco
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Reged: 16/11/16
Posts: 135
Loc: ITALY
Re: 7x66 Vom Hofe Super Express. [Re: Rule303]
      #332457 - 17/09/19 08:30 PM

The pressure of this load is 4250 bar, 150 bar below the max.
From the last time i have changed powder. Now with the N570 i can reach 980 ms with 4250 bar. So it's safer and faster. This load was developed for gams, the Fallowdeer was an accidentally tester.
Doc

Edited by dotchicco (17/09/19 08:32 PM)


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