Looking for the length of 1930's 175 gr 7mm Mauser cartridge. I know rifles of that era were "long throated" to accommodate ammunition of that era.

Thank you,
JDG

3.068 inches
Not 175 gr but 173 gr
the 175 gr is a "american thing"
The bullet is also not a .284 but a .285

The throat is standard for the caliber and not long for caliber ! "Short" throats are a american thing.

There is a difference between the "americanized"
7x57 and the original 7x57 The problem lies with SAAMI Spec shell holders and dies and euro CIP derived cases.

That's pretty much the point of my question. Trying to recreate a load for a pre-war Griffin and Howe 7mm.

For years Ive copied the chamber/throat and magazine length of the Brno mod 21 and 22, 30-06 length magazine, and I seat the 175 gr. Nosler .284 (one caliber) deep in the case..With H414 I can get an easy 2700 FPS without much pressure. Also it defies the old wives tale about bullet jump as all my 7x57 and the Brnos Ive owned would shoot the 120 and 130 gr. Sierra and Speer as accurately as they do the 175 gr. bullet..and they all were very accurate with any bullet..I love the caliber so set up.

You can keep life simple if you make a dummy round with the 175 or 160 gr. bullet, set bullet depth in the case to fit in any 30-06 length magazine, they send the dummy and gun to your gun smith, of ream your chamber to fit the magazine...

Its a pain to me how many factory rifles have long magazines and short throats..Its criminal.

Ray,

I get what you are saying but I'm curious about the ammo at the time my G&H was built. I know the round was originally designed for 174-175gr bullets loaded to obtain a velocity of about 2300fps. These bullets were relatively long and so I am told that the throats were longer to accommodate them. What I am trying to determine as closely as possible the overall length of the cartridge so that I can determine how deep to seat the bullets.

I have an example of the old 173gr round nose loading in my collection. The OAL is within a few thou of the measurement posted by ALF.

Go to a local Hobby shop & get 2 wheel collars that will slip onto your ramrod.

Slip both collars onto the ramrod, then insert the ramrod into the barrel with a closed, flat end against the bolt face. (with the striker cocked) Slide both collars against the muzzle & secure the one closest to the ramrod handle with the set screw.

Now, put a stiff spring into a fired case & the bullet of choice on top.. Close the bolt on your spring loaded dummy round.

Push lightly on the ramrod until you feel it contact the bullet. You should be able to feel the spring tension. Slide the inner collar against the muzzle & secure it with the set screw.

Measure the gap between the wheel collars. That is your maximum COAL with the ogive touching the lands. Back off for the amount of freebore that you want.

The info on your G&H rifle is available from the current G&H
They have a service at a fee where they will access the ledgers in their possession, make copies and send you the details

They hold the ledgers from Abercrombie and Fitch, G&H and the importers Von Lengerke and Detmold. The latter was a important source of euro rifles and components.

G&H used both Euro and local barrels
Complete guns were imported and remarked so your rifles detailes should be available.

The main source of ammo around that time (1930) was Remington Cleanbore in the two traditional weights for the 7mm as well as DWM ammo imported by Von Lengerke and Detmold also in the two weights. ( 140 gr and 173 gr) Evidence of this can be found in the catalogs of Abercrombie and Fitch and Von Lengerke and Detmold of 1930

ALF,

Thank you for the suggestion. I'll reach out to G&H for the records for my rifle.

JDG

My approach to this subject has never been from a historic point of view, but to make more room for more powder and get higher velocity at equal pressure. Basically my approach will give you the same velocity as the 7x57 Ackley in every rifle, and more than a 280 Rem factory round, and much to my surprise it will outperform the 140 gr 7 mag. factory ammo, albeit that ammo is underloaded greatly..It will not compete with a handloaded 7 mag. The one that holds the most powder will most likely win every time.

So, what velocities are you getting with your "approach" ? What powder/s ?

I dislike quoting max loads, as someone may attempt to that load in a standard chamber and that's probably a bad idea, but send me your email and I will send you my load data for a long throated 7x57. All loads are with increased loads of H414 powder.

quote:

Originally posted by Atkinson:
I dislike quoting max loads, as someone may attempt to that load in a standard chamber and that's probably a bad idea, but send me your email and I will send you my load data for a long throated 7x57. All loads are with increased loads of H414 powder.

Agree. For my purposes, I don't need anything over 2300fps. Wonder what velocity Bell used to kill elephants.

quote:

Originally posted by Atkinson:
I dislike quoting max loads, as someone may attempt to that load in a standard chamber and that's probably a bad idea, but send me your email and I will send you my load data for a long throated 7x57. All loads are with increased loads of H414 powder.

PM sent, thanks!