Gunner wrote:
On Thu, 10 Jan 2008 21:46:44 -0800, "SteveB"
wrote:


"Louis Ohland" wrote in message
...
Yes. There is a 57mm long case with a .473" diameter case head
common to the 6x57, 7x57, and 8x57 rounds.

SteveB wrote:
Is a 7 x 57 and a 7mm Mauser shell the same thing? It's mostly
metal .........

Steve

If I read you right, then I can shoot the shells labeled 7mm Mauser
in my Ruger?

Very much so Yes.


I'll be a little more specific. I inherited a Ruger M77 with the
identifying 7 x 57 on the side of the barrel indicating the caliber.
I have since read and learned NOT to use the old military ammo, and
for various reasons. Old powder, high acid contents, poor
ballistics on the round point ammo, lots of things. I also read not
to use the new shells in the old guns. I have Googled and Googled
and read and read. I come up with two definite matches on 7 x 57
shells being sold as that specific designation, and not as 7mm
Mauser. IIRC, Norma and a Japanese brand. Then I read a lot of the
standard 7mm Mauser ammo was intentionally lightly loaded because it
was being used in the old guns. So if you wanted higher power, you
had to hand load.

But, the 7mm Mauser are listed in the dimension charts I find as
7.214 mm bullet with a 57 mm case. In many sites, the 7 x 57 and
the 7mm Mauser are bunched together as one. I read in a Rifle
Shooter Magazine that there are 4 names for this shell ..... Spanish
Mauser, 7 mm Mauser, 7 x 57, and in England the .275 Rigby. They
were doing an article of the history of 7mm cartridges.

I was at the gun store today (not a gun shop, but a borg type store)
and the guy said the 7mm Mauser shells on the shelf would NOT fit
the Ruger.

I shall call Ruger tomorrow if they don't return the message I left
this evening.

Most of what I am finding would lead me to conclude this rifle will
safely shoot the 7mm Mauser cartridge, but I want to be 102% sure
before I buy a box, not to mention when I chamber one and squeeze it
off. I compared bullet and case dimensions on various sites, and
they vary by only .001" looking up 7 x 57 and 7mm Mauser cartridges.
As an example, I got .472" base diameter. (You stated .473") And I
find it a little odd that although the bullet diameter changes, the
case base diameter and length does not. Is the same amount of
powder used on all three rounds?

Just hoping someone in the group would have this metal related
knowledge. I know a bit about guns, but not this deep.

Steve


You have an excellent combination. Particularly if you handload.

The vast majority of 7 Mauser ammo, is loaded down to about 45,000
PSI, because of the numbers of small ring Mausers that it may be shot
in.
If you handload, you can modernize the ballistics up to 50-55k PSI (in
modern new cases) for significant ballistic improvement.

The 7 Mauser is a pretty damned good universal cartridge. Small game
up to the All American 5.

Now getting the 77 to shoot accurately...thats another story....

Gunner

I have a stainless 77 in .270 . Haven't noticed any problem with accuracy ,
but then I haven't shot it much . *******s have closed the only public rifle
range in this part of Tennessee .
--

Snag aka OSG #1
'90 Ultra , "Strider"
'39 WLDD "PopCycle"
The road goes on forever ...
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