Help identify shell casing

[Helka]

Found a few of these cases at my range.

From what I could research it was made by Dominion Arms (Quebec) in 79 Berdan Primed but I looked through my reloading manual and I couldn’t find what cartridge this is.

Measurements are approximate.

Base- .495
Coal- 2.178
Length to shoulder 1.760
Case mouth inside is .305
Case mouth outside is .341

Would like to add it to my collection but need to identify it.

Thanks

 

[zuke]

8mm mauser

 

[vagrantviking]

8mm mauser

The lengths should tell the real story but it's unlikely a fired 8mm has an inside neck diameter less than around 0.320".
Miss print for 7mm?

 

[Helka]

I just looked up the measurements for the 8mm Mauser book states it has a .473 base while mine measure .495. COAL is 2.244 while mine is 2.178. To me those are significant differences. Even to the shoulder the difference is .059.

 

[oldrodder]

7.62X51 (308 Win)

 

[Helka]

7.62X51 (308 Win)

Here it is next to a 308

 

[kawicrash]

7.5x55 Swiss

 

[Helka]

7.5x55 Swiss

I think your right! Thanks

 

[diopter]

Found a few of these cases at my range.

From what I could research it was made by Dominion Arms (Quebec) in 79 Berdan Primed but I looked through my reloading manual and I couldn’t find what cartridge this is.

Measurements are approximate.

Base- .495
Coal- 2.178
Length to shoulder 1.760
Case mouth inside is .305
Case mouth outside is .341

Would like to add it to my collection but need to identify it.

Thanks

View attachment 552181

Left side: D= Dornach, brass supplier
Right side: A = Altdorf, ammo factory
Top: 7 = month of manufacture
Bottom: 79 = year

 

[Snider shooter]

7.5x55 Swiss. I have a few. Rifles and that ammunition.

 

[Helka]

Thanks Everyone!

 

[woodchopper]

7.5x55

I hate that stuff, gets mixed in with all the other brass.

 

[Ltbull01]

7.5×55mm Swiss? But I see the mystery has been solved!