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 7 mm french revolver? 
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Joined: Wed Dec 31, 1969 8:00 pm
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Post 7 mm french revolver?
Hi,
I would like to know if this cartridge is a 7 mm french revolver or something else.
Its dimensional data:
Rim diam:8.98 mm
Base diam:7.55 mm
neck diam:7.50 mm
bullet diam:7.46 mm
case L:12.97 mm
OAL:20.94 mm

Image

Image

Thanks
Pivi


Mon Jan 14, 2008 5:45 am
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.30 short rimfire ?


Mon Jan 14, 2008 8:22 am
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That's because I have post my question,I can't actually even say if this is a CF or a RF cartridge.The rim is almost thick....
However 30 short dimensional data are very similar to those of my sample

Pivi


Mon Jan 14, 2008 8:35 am
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This case is also very similar to the 7mm Dumonthier Sarbacane which was produced as Internally primed CF. The bullet also has a "French" look about it.


Mon Jan 14, 2008 1:44 pm
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Thanks,
I haven't got the 7 mm dumonthier cartridge in my files.Could you post some dimensional data and a picture of it please?However on 9 mm dumonthier cartridges there was a "D" in the headstamp that tells it from other cartridges.I think that a similar hds should be also on the 7 mm version

Pivi[/quote]


Mon Jan 14, 2008 2:32 pm
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The dimensions are close to a 30 Short RF. The case is slightly shorter than most 30 short. Looking at the picture it appears to be a brass case. All the 30 shorts I have (US manufactured) have copper case. It could be a .297 rimfire. I don't know if they were ever made using brass cases. Again all the ones I have are copper (but I don't have that many). The rim looks thicker than any of the .297 RF I have. I would guess inside primed.

Paul


Mon Jan 14, 2008 7:21 pm
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Yes,it has a brass case.However rim thickness is:1,27 mm

Pivi


Tue Jan 15, 2008 8:38 am
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Pivi wrote:
Yes,it has a brass case.However rim thickness is:1,27 mm

Pivi

Hi Pivi
1) are you sure of your bullet diameter ?
2) could you put a view seing the rim profil ?

jp


Tue Jan 15, 2008 3:16 pm
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Hi JP,
bullet diameter ranges from 7.46 to 7.47 mm
The neck of the case is heavy crimped,however the first cylyndrical portion besides the crimp measures 7.50 to 7.51 mm
I will post the required picture later

Pivi


Tue Jan 15, 2008 4:12 pm
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[
your measurements are excatly the ones of a 30 Sharps RF except the bullet diameter which is a little bite too important.
I would like to see the rim profile to be sure
jp


Tue Jan 15, 2008 5:51 pm
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Here you have some pictures of the rim

Image

Image


Wed Jan 16, 2008 10:58 am
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it is not a 30 sharps made by SFM.(the top of the rim is flat)
Sorry


Wed Jan 16, 2008 2:22 pm
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If it really is an inside primed round I'd list it as "7 mm french revolver".

Pivi


Thu Jan 17, 2008 8:34 am
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Here is a comparison of similar case types:

7mm French Rev
(CF or IP)
bullet: 7.23-7.7 mm
neck : 7.5-8.0 mm
Base : 7.7- 8.1 mm
Rim : 8.62-9.3 mm
case : 14.7-16.65 mm
rim th: 1.0-1.2 mm

7mm Dumonthier
(IP)
bullet: 7.3-7.53 mm
neck : 7.6-7.72 mm
Base : 7.7-7.8 mm
Rim : 8.85-9.0 mm
case : 11.35-11.5 mm
rim th: 1.1-1.2 mm

7mm Canne
(CF)
bullet: 7.3-7.65 mm
neck : 7.6-7.75 mm
Base : 7.7-7.75 mm
Rim : 8.65-8.9 mm
case : 11.2-12.6mm
rim th: 1.05-1.15 mm

Yours
(IP ?)
bullet: 7.46 mm
neck : 7.50 mm
Base : 7.55 mm
Rim : 8.98 mm
case : 12.97 mm
rim th: 1.27 mm

Your example doesn't exactly fit in either of these. However, E&B gives the case length of the 7mm French Revolver as 14.7-16.65mm, the ECRADBV gives 14.6-16.65mm which is significantly longer than your case.

I still believe that the 7mm Dumonthier is a better candidate but we can never be sure. The Dumonthier is known with a variety of hs. No hs examples are not known but are quite possible - your hs looks like it may have had lettering which has been worn/polished off ??


Thu Jan 17, 2008 12:35 pm
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No,the base seems to have never had any hds.It isn't worn or polished off.However consider that this case has a heavy crimp.According to me the real case lenght is about 13.5 mm or so due to the neck portion folded to the bullet


Thu Jan 17, 2008 12:49 pm
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