Help with 12.7 round

[flak18]

Hello. I know very little about small arms ammo. I regularly see .50 BMG cases for sale at car boot fairs as I'm sure we all do. Saw a case on Sunday and it looked a little long in the neck. Had a look at thew H/S and it is 12.7 C MR 2.51. OK, I assumed a French 12.7 BMG. Then I noticed it is rimmed !!! It measures, not the regulat 99mm but 102 mm. Any help please ? Sorry, can't post pictures on here yet. Thanks in advance

 

[TonyE]

Sounds like the penultimate stage of 12.7mm Browning manufacture before trimmimg and turning of the extractor groove.

Regards
TonyE

 

[flak18]

Hello Tony...yes, it does now you mention it. No primer has been in place either which also makes sense. I suppose it was someone in the factory who wanted a souvenir. Thanks for your help. Matt

 

[imaokie2000]

I have a simular round in WRA 55.

 

[smle2009]

Anybody got some info on the 12.7 ShVAK?,can't help but think of these rounds every time a rimmed 50 cal turns up,I know the 12.7mm ShVAK was rimmed and only used very briefly before being necked up to 20mm as the 20mm ShVAK,were they ever copied by other countries for trials ect? any idea of the case length of these rounds?

Also if these are unfinished 50 cal,why has a rimless cartridge got a rim with the leading edge machined off?(seen quite clearly in the above post photo).I have never seen on here or other places a unfinished rimless case with a rim on it?????

Tony

 

[Tmine35]

According to Christian Koll's "Soviet Cannon" 12,7x108R ShVAK ammo was made in Soviet Union only. Thus only Soviet headstamps should appear? Case shoulder seems to be much longer and slimmer than in .50 shown above.

 

[smle2009]

http://iaaforum.org/forum3/viewtopic.php?f=1&t=4999

 

[Tony Williams]

Here's a pic of limited service and experimental HMG rounds from my collection:

12.7x99 (for scale), 12.7x110 (.50 North or Colt-Kynoch), 13.2x92SR (the original German TuF Maxim HMG of 1918, of which c. 24 were built), 12.7x120SR (Vickers Class D HV, saw very limited use), 12.7X108R (ShVAK HMG: few were made before it was converted to 20mm), 13.9x99B (.55 Boys ATR round - proposed for Rolls-Royce aircraft MG), 15.2x114 (US .60" T17), 12.7x114 (US .50/60"), 12.7x120 (US .50" HV - from 20mm HS.404 case), 16x99 (US 16mm Vega exp), 13x64 (exp rimless version of MG 131), 7.92x82B (exp necked-down MG 131), 13x77B (replica exp HV MG 131), 15x69B case (exp necked-up MG 131), 13x92B (exp MG 215/13), 15x83B (exp MG 215/15), 15x115 (postwar FN BRG; early pattern based on HS.404 case), 15.5x106 (FN BRG late pattern - based on KPV case)​

 

[RNLMC]

unfinished 12.7 mm round

good morning gents.
here are a view pics of a 12.7 mm case i pickt up a view months ago at a jumble arount here.
first i was wondering if it was something special, but someone told me it was a unfinished 12.7 mm case from the EMZ factory here in town.
EMZ is euro-metaal zaandam the netherlands. factory closed years ago. must be someone`s souvenir as allready mentiond. still nice to see there are more around.

regards werner.

 

[Hoeksel]

Finally I found a 12,7 mm ShVAK! My round has a hole unfortnuately, is stamped 1938, and has dimensions 12,7x108SR25.

 

[Tmine35]

Congratulations, there are not many around.