Russian Proof
A big thanks to Per for collecting this.
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Barrels are tested before they are joined with the following preliminary testloads:
|
Gauge
|
Pressure
(psi)
|
Load Oz
|
|
12
|
13667
|
1 1/4
|
|
16
|
14402
|
1,05
|
|
20
|
15210
|
0,88
|
|
For single barreled guns the following test is made:
|
Gauge
|
Pressure
(psi)
|
Load Oz
|
|
12
|
12198
|
1 1/4
|
|
16
|
12932
|
1,05
|
|
20
|
13667
|
0,88
|
|
28
|
14402
|
0,71
|
|
32
|
15207
|
0,53
|
|
Proof house marks
|
Mark
|
Proof house
|
Valid
|
Type of proof
|
|
 
|
Tuula
|
-> 1917
|
Proof house mark
|
|
 or  or 
|
Tuula
|
1950 ->
|
Proof house mark
|
|
|
Izhevsk
|
?
|
Tests of weapons and ammunition control ; laboratory Izhevsk
|
|
|
Klimovsk
|
?
|
Tests of weapons and ammunition control ; laboratory Klimovsk
|
|
|
Krasnozavodsk
|
?
|
Tests of weapons and ammunition control ; laboratory Krasnozavodsk
|
|
|
Klimovsk
|
2010 ->
|
Verification Keymark Klimovsk II .
( 26 January 2010)
|
|
|
|
|
|
|
 or  or  or 
|
Izhevsk
|
1950 ->
|
Proof house mark
|
|
Tuula and Izhevsk marks
|
Mark
|
Proof house
|
Valid
|
Type of proof
|
|
 
|
Tuula and Izhevsk
|
1950 ->
|
Temporary black powder proof
|
|
 
|
Tuula and Izhevsk
|
1950 ->
|
Final black Powder proof
|
|
  
|
Tuula and Izhevsk
|
1950 ->
|
Final proof with nitro powder and test shooting
|
|
or
 
|
Tuula and Izhevsk
|
1950 ->
|
Final nitro/smokless proof
|
|
|
Tuula and Izhevsk
|
1950 ->
|
Indicates test firing for aim and pattern
|
|
or
or
|
Tuula and Izhevsk
|
1950 ->
|
Max working pressure for cartridge
|
|
      
|
Tuula and Izhevsk
|
1950 ->
|
Gauge and chamber length, different stamps seems to have been in use in a rather odd way
|
|
|
Tuula and Izhevsk
|
1950 ->
|
Improved modified choke
|
|
|
Tuula and Izhevsk
|
1950 ->
|
Cylinder choke
|
|
|
Tuula and Izhevsk
|
1950 ->
|
Full choke
|
|
|
Tuula and Izhevsk
|
1950 ->
|
Modified
|
|
|
Tuula and Izhevsk
|
1950 ->
|
Full choke
|
|
|
Tuula and Izhevsk
|
1950 ->
|
Modified choke
|
|
|
Tuula and Izhevsk
|
1950 ->
|
Full choke
|
|
|
Tuula and Izhevsk
|
1950 ->
|
Full choke
|
|
|
Tuula and Izhevsk
|
1950 ->
|
For paper cartridges only
(But WHY????)
|
|
 or  or  or  or 
|
Tuula and Izhevsk
|
1950 ->
|
Quality marks, unknown what each stamp means
|
|
 or  or  or  or 
|
Tuula and Izhevsk
|
1950 ->
|
Steel quality or steel type
|
|
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Last update: 2015-03-05
|
