Hi as you can get 7x64 barrel in the Sauer 202, I was wondering how it compares to other 7mm calibers?

.280 Remington, they're ballistic twins.

As mentioned, it's as close to a 280 Rem as you can get. I've got a 7x64 and a 7x57, the Mauser is still my favorite hunting rifle but the 7x64 definately has more horsepower.

The 7x64 isn't similar to the 280Rem it IS the 280rem.

the differences in official dimensions are less than the production tolerances and in no dimension do the differences exceed 0.002".

The 280Rem has a lower maximum pressure in deference
to the semi-auto and pump action rifles for whcch the cartridge was originally designed.

If you handload the 280 to the higher pressure there really
is no difference.

I've been told that some domestic manufacturers chambers the 7x64 in rifles for export and that the chambers are cut
with the same reamer. the only difference is in how the barrels are marked.

AllanD

I know they're very close, but I cannot chamber 280 brass in my Sako 7x64. I do, however, use 280 load information with no problem.

Dr. Lou makes a good point. The 280 shoulder is a little forward of the 7X64, other wise the are ballistic equals!

Jerry

Balistically they are the same but they ARE NOT interchangeable. You might be able to make .280 brass work for the 7x64 but not the other way around.

Thanks for the answers.

While they won't interchange as they sit. They are about as close as you get. Looks to me like very little work would be required to form one to the other. Only issue I see would be a real tight 7X64 chamber and large based 280 cases.

quote:

The 7x64 isn't similar to the 280Rem it IS the 280rem.

Ah, no.

quote:

the differences in official dimensions are less than the production tolerances and in no dimension do the differences exceed 0.002".

Let's see here:

Difference in rim diameter: 0.003"

Difference in head diameter: 0.004"

Difference in case length: 0.021"

Difference in shoulder diameter: 0.016"

Difference in length to shoulder: 0.028"

Difference in shoulder angle: roughly 3 degrees

Difference in neck diameter: 0.002"

quote:

I've been told that some domestic manufacturers chambers the 7x64 in rifles for export and that the chambers are cut with the same reamer. the only difference is in how the barrels are marked.

False. I had a Ruger 77 in 7x64 (1999 production for export) that would not chamber 280 ammo. Moreover, if you ever held the two rounds side-by-side the differences are quite easy to see.

Perhaps you are thinking of the 280 and the 7mm Express, which are the same round.

quote:

Originally posted by 9.3x62:

quote:

The 7x64 isn't similar to the 280Rem it IS the 280rem.

Ah, no.

quote:

the differences in official dimensions are less than the production tolerances and in no dimension do the differences exceed 0.002".

Let's see here:

Difference in rim diameter: 0.003"

Difference in head diameter: 0.004"

Difference in case length: 0.021"

Difference in shoulder diameter: 0.016"

Difference in length to shoulder: 0.028"

Difference in shoulder angle: roughly 3 degrees

Difference in neck diameter: 0.002"

quote:

I've been told that some domestic manufacturers chambers the 7x64 in rifles for export and that the chambers are cut with the same reamer. the only difference is in how the barrels are marked.

False. I had a Ruger 77 in 7x64 (1999 production for export) that would not chamber 280 ammo. Moreover, if you ever held the two rounds side-by-side the differences are quite easy to see.

Perhaps you are thinking of the 280 and the 7mm Express, which are the same round.

that differs from the line drawings I received about 18months ago....

But then again I received those drawlings from someone who was trying to sell me a new takeoff barrel in 7x64....

Never trust someone trying to sell you something

I guess I should be glad I didn't buy the barrel

I stand corrected.

AllanD

So which of the 7x64 and 280Rem has the largest case capacity? (in grains of water for example)

quote:

Originally posted by Jerry Eden:
Dr. Lou makes a good point. The 280 shoulder is a little forward of the 7X64, other wise the are ballistic equals!

Jerry

Exactly! The .280 Rem. was made longer in head-to-shoulder length to prevent a person from indadvertently chambering a .280 round in a .270 Win. rifle and causing an exciting occurrance. Thus, the 7X64mm IS NOT the .280! Not exactly, anyway.

quote:

Originally posted by ErikD:
So which of the 7x64 and 280Rem has the largest case capacity? (in grains of water for example)

Guess!! The 280, maybe??

quote:

So which of the 7x64 and 280Rem has the largest case capacity? (in grains of water for example)

Loadtech calls the 7X64 66.8gr water and the 280 67.4. Part of the difference is the 280 is longer. Loaded to the same col the net will be basically the same. You will see more than .6 grs difference between different brands of the same brass.

quote:

Originally posted by ErikD:
So which of the 7x64 and 280Rem has the largest case capacity? (in grains of water for example)

ErikD,
7X64 Brenneke Difference in capacity between 7x64 Brenneke and 280 is very small.

Cheers
/JOHAN

Not really enough difference in case capacity to choose either one or the other caliber. Better choose according to availability and price of ammo, components, dies - and naturally guns...

- mike

P.S. Erik has been thinking hard about a 7x64, I guess that is what has his head spinning....

Sherpi,
The main difference for you regarding those two calibers is that ammunition for the 280 Rem is unavailable in your whereabouts. So there is nothing to gain from it for you since the 7x64 is readily available.

Besides, the 7x64 has a 40 year headstart on the 280, as well as being larger (though not by much as others have said). It is available all over Europe both in guns and ammunition.
I am just about certain that Brenneke´s round has even the advantage worldwide in terms of ammunition.

Regards

quote:

am just about certain that Brenneke´s round has even the advantage worldwide in terms of ammunition.

And as far as loads are concerned as well, if you are using factory ammo. The .280 Rem. has always been loaded to levels below its' potential, due to the need for the .280 to be usable in the Remington semi-auto family of rifles.

The 7x64mm is the European .270, cannot get much better than that, when you think about it!!!
LLS
Mannlicher Collector

Compared to the venerable and excellently balanced 7x57, it looks better on paper and performs worse in the field.

Carcano

I don't understand what you mean. The 7x64 is more powerful and shoots flatter than the 7x57. What can happen is that light, fragile bullets balanced to lower velocities, expand to quickly in the faster 7x64. This is a matter of choosing the right bullet.