No- the 7x57 was developed separately, in 1892 by Paul Mauser. The 8mm Mauser (actually the 7.92 Mauser, but every calls it the 8mm) was developed by a government board.
i have a very old mauser which is not an 8mm, i have alot of those. i is markerd berlin and ser number 1909. i can not find a marking of what cal it may be but a 8mm will almost fit but not close. can you help me find the cal. maybe 7mm ( how hard to find that?) mikkel.mikkelson@comcast.com
Numerous commercial and custom makers have made 8mm Mauser rifles in the last 100 years
What about it?
No
The 8mm Mauser is a good black bear round. American 8mm is kind of underpowered but with handloading or European ammo its in the same class as 30-06..
The "British"- meaning the British government- did not make an 8mm Mauser rifle. Some private gun makers in England have- but without more information, there is no way to answer. Please repost your question with some identifying information, and we can try to help. Let's start with all markings on your rifle.
$450
Yes....
10000.00
"No, 7.92 is German military caliber for WW 2 and earlier Mauser rifles." Actually, 7.92x57 is the same thing as the 8MM Mauser, if that's what the person was asking.
7.92x57mm, better known as 8mm Mauser. Same caliber as the German military's Mausers.