.410 Mauser conversion?

For the discussion of Military German pre-WWI through post-WWII mauser bolt action rifles.

.410 Mauser conversion?

Rustybore
Veteran member
Joined: 01 Jan 2002, 12:19

01 Jun 2015, 22:28 #1

I have what was once a Vz-24 Mauser converted to, I think, a .410.  The barrel has been reamed smooth, stamped on barrel is 7.9mm, 2.244 in., 130 tons sq. in.  The work was done in England after WWII, I think.  At least it has the British proof marks for export.  Receiver is partially scrubbed, but I can make out the early Czech crest and the acceptance mark on side of receiver.  The bolt face has not been opened up to accept a standard .410 shotgun shell.  Any ideas of what I have?

Kevin in Or. 
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Doc AV
Veteran member
Joined: 06 Feb 2001, 14:19

05 Jun 2015, 12:38 #2

???130 Tons per sq.inch??? you mean 13.0 tons/sq. inch!!! NOT .410, but a British "shot-gunned" (Smoothbored)--ie, Rifling reamed out, but new bore about .330"...a round-about means of getting a "military" Rifle onto a much easier Shotgun Certificate, back in the 1950s and 60s in Britain....British commercial proof marks are for "Trade", (in UK), not necessarily for "Export" specifically, but all guns exported will have British commercial proofs.

If it was ".410," it would have ".410" on the barrel, and not "7,9mm"...so chamber is still for a 7,9x57 case ( 2,244" case length). One can fire Blanks and even a shot-sabot; (it is on a shotgun certificate) but NOT Ball.

Strange British Gun Laws ( this evasion no longer possible).

Doc AV
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Rustybore
Veteran member
Joined: 01 Jan 2002, 12:19

12 Jun 2015, 22:22 #3

Doc AV, thanks for the reply. I did check the bore and it was reamed out to 0.368 in. Shame to do this to a rifle. The parts do not match, though, I assume mixed up during the "rebuild". Stock is in great condition, and the metal was reblued, receiver scrubbed. Why would a Brit want to own such an abomination of a good rifle? At this point, about all I can do with it is to rebarrel and make a shooter, part it out at a gunshow, or sell it.

Kevin in Or.
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Doc AV
Veteran member
Joined: 06 Feb 2001, 14:19

17 Jun 2015, 10:43 #4

Barrel could be Reamed and rifled to .375" (ie, 9,5x57 Calibre, a "Mauser" Sporting calibre....good for Heavy deer and Moose.

Otherwise, a replacement ("take-off" Vz24 barrel) for a representative Vz24, or a Re-enactor. ( in shotgunned state or rebarrelled.)

Doc AV
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high speed cruise
Veteran member
Joined: 16 Nov 2004, 10:47

05 Jan 2017, 07:22 #5

That's pretty neat, that a Mauser barrel can be reamed out to .375 caliber. Maybe I should do that with this shot-out (rusted out) 8mm I have.
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dork av
new member
Joined: 22 Dec 2016, 14:47

05 Sep 2017, 21:41 #6

The cost of having a barrel line bored and re-rifled and chambered is about 3x the cost of just buying a barrel ready to go .
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