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What does this mean? Ammo question
phideaux4886
Member Posts: 1,470 ✭✭✭✭✭
7 x 57 mm, rimless ammunition
I have never heard of rimless ammo before and whould like to know what it is.
DSm
I have never heard of rimless ammo before and whould like to know what it is.
DSm
Comments
When the rim is the same diameter as the shell base (like .45 autos, 30-06, etc. there is a machined groove to allow extraction and these are considered "rimless". There are also "rebated" rims which are smaller than body diameter like the .284.
It is standard 7x57 Mauser. Rimless means that the "rim" doesn't extend out side the base or web of the case.
The rim of the so-called rimless case is approximately the same diameter as the rearmost edge of the case at the extractor groove such as the .270, .30-06, 7mm Mauser and many others. Compare an '06 case with the 30-30 case and you'll see the difference.
Cheers,
OleDuk[:)][:)]
DSM
From left to right:
Rimless..Semi-Rimmed..Rimmed..Rebated Rimmed..Belted
Crims40
Good information by all posters.
In the case of the 7x57 it was made in two versions both as a rimless version and a rimmed version. The rimmed version is not seen often in the US but is much more popular in Europe.
The rimless version was loaded in a limited number of Mauser 1892 rifles and later in Spanish Mausers which were responsible for most of casualties on San Juan Hill in Cuba. At one time it was also loaded in the Winchester Model 70.
I have seen the rimmed version used in drillings some of which were recently offered for sale by CDNN. These were, as my poor memory serves me, an over/under rifle chambered for the 7x57R or rimmed. They were also selling ammunition to accompany the rifle. In this case the rim would be useful for positive extraction.
Since the 7x57 exists in both a rimmed and rimless version, the cartridge is sometimes referred to as a the 7x57 rimless to distinguish it from the 7x57R or rimmed version of essentially the same cartridge. Each cartridge has the essentially the same ballistics.
Regards,
Heavyiron
I caught mention of rimless on a Mauser site and made a note to ask some questions. I've never shot the Mauser, but I'd want to at some time and I would hate to damage it by putting the wrong round in it.
Thanks for the comments.
DSM
My questioning is regarding an old Mauser that I have. I'd like to own a few old Mausers since I have a wife from Germany.
German guns go with german wives? Does this mean that I can buy a Polish SKS for my polish wife?