9,3 Schauman Magnum
As a result of
The good old 7,62 Mosin Nagant cartridge has been necked down to 5,7mm,
6,3mm and 7mm and necked up to 8mm, .338, 9,3mm, .458 and maybe some more. Many
of these rounds were commercially manufactured for some decades and some cases
for them can still be bought.
Examples:
Necking up a cartridge gives new life for an old shot out barrel and sometimes
improved ballistics, too. At a certain time these conversions were often made by
local gunsmiths in
Sporterized Winchester 95 Military Rifles
Sporterized WIN95 & Mosin Nagant
Rifles
For improving a 9,3x53R Mosin Nagant rifle a case with more powder space is
needed. ‘Improving’ the Mosin Nagant type case could be one way but a new basic
case is a bigger step forward. When the first ideas for this cartridge came up
the 350RemMag was not in mind. The magazine of the Mosin Nagant rifle dictates
maximum cartridge length and so a case length similar to the 350RemMag is
logical. Another point to consider when you are determined to change the case is
bolt head and extractor. Surprisingly some Mosin Nagant bolts can handle the
common belted case head without any problems but some bolt heads need a
treatment like this private solution:
The original 350RemMag ‘suffers’ a little under its COL. In a Mosin Nagant type rifle heavier bullets can be seated so far out that the whole inside volume is usable for powder.
There is a tendency in several countries to ban lead containing bullets for
hunting. Lead free bullets of a certain weight are longer than lead containing
ones. Regarding this development a larger
The 9,3 Schauman Magnum is an inside volume twin of the 9,3x62. That made of
course load development rather simple. It is using the barrel lead of the
9,3x53R. Actual measurements have shown that loads for the 9,3x66 Sako are more
appropriate due to the superior strength of the magnum case head.
This picture shows a Mosin Nagant barrel rechambered for the
9,3SchaumanMagnum and a 9,3x53R case placed inside. The increase in powder
space is obvious.
If you like to know more about the 9,3 Schauman Magnum write to
Caj
Schauman.