Hi,

Does anyone know any details about 10,75x63? Was there any specific gun made for this? A number of guns found their way to northern Sweden and I have a cartridge in my collection. Always believed it was 10,75x68 until I actually
measured it.

/Marax

Here's what Dixon has to say about the 10,75x63 in "European Sporting Cartridges":

"The 10,75x63G Mauser was listed in the 1911 Alfa catalog and RWS catalogs up until 1928. It appears identical to the calibre listed by DWM for Le Personne and Company of London and given case #515 (c1908). Also listed by Gecado in their 1930 catalog. Much rarer than the longer 10,75x68."

He shows dates from 1908 to 1932 for factory loaded ammo. He also mentions that the 10,75x68 was DWM case #515A.

From Cartridges of the World 4th Edition,

"Although generally reffered to in the literature as a Mauser cartridge, some authorities say this is a Mannlicher development. Introduced about 1910 and obsolete for many years. It is not listed in post WWII German or British catalogs. Except for length, it has practically the same dimensions as the 10.75x68. Most samples were made by RWS, but the old DWM case # 515 (listed as the 10,75x62) is probably the same cartridge. There was also a 10.75x62 straight case, whereas the one listed here is necked. It was loaded with a 347 or 350 gr bullet @ about 1200fps, but the exact ballistics are lacking. It is a little more powerful than the .405 Winchester, but not much. Standard ballistics and loading data not available."

Hope this helps.

I have come to the conclusion those old smiths just ran a reamer into the barrel and measured it, then named it...