A friend of mine has a 7.65. I can't remember who he got it from or anything. We've tried looking a few different places for ammo, and I've tried to find some info on it for a while, but I haven't found anything.

Did yu mean the RIFLE CARTRIDGE?............(info borrowed from www.kimdutit.com)
In 1890, Argentina decided to adopt the Mauser for their main battle rifle, and ordered it in the then-unknown caliber of 7.65mm (actually, the 7.65x53mm, or 7.65mm Argentine). The Mausers thus chambered were known as the 1891 Argentine Mauser, and were made by Ludwig Loewe and DWM (Mauser).

The 1891 spec was later changed into the Gew 98 design, and called the Model 1909, made both in Germany and in the then-new Argentinian arms factories (FMAP) at Rosario and at Santa Fe.
Unlike the 1891, the Mod 1909 rifle saw no military action, and so they're typically in better condition than the 1891. Their actions are superbly made, and the 1909 action is often used as a "base" for customizing work. Unfortunately, the rifle is usually re-chambered into a more popular caliber, and that's a real pity.

Because the 7.65mm Argentine is a peach of a cartridge. It has low recoil, but nevertheless manages to get performance which rivals the .308 Win (according to the late Frank Barnes, Mr. Cartridge himself). It's flat-shooting, and the bullet arrives with authority, especially the larger 180gr variant -- which does have more recoil than the more-common 150gr weight, incidentally. Ammo is expensive (about $40 per 20 for the commercial stuff, made by Norma), but it's not difficult to find. However, there is a considerable amount of decent mil-surp stuff around, which sells for much less (around $40 per 100).


Or the PISTOL CARTIDGE?...........(which i borrowed from wwwphoenixcommand.com)..................Which was used in the Mauser Broomhandle pistol and also in a version of the Luger. Luger info follows here.........
7.65 mm DWM Luger 08/20 - This is the 7.65mm version of the excellent 9mm Parabellum P08 (model 1908) automatic pistol, commonly called the Luger, which was used by the German army in World War I. The Versailles peace treaty specified that German pistols had to be of a caliber smaller than 9mm and that their barrels could not be longer than 102 mm. Thus a modified version of the pistol was introduced, using the powerful 7.65mm Parabellum cartridge.

The gun achieved considerable export success in the Twenties and Thirties. Finland purchased 8000 such weapons (designated as the Parabellum m/23) and during the Winter War they were used by officers, NCOs, heavy weapon, tank and aircraft crews.

8mm/06 did a fine job of describing the Belgian Mauser....excellent!

If you like this gun and want to shoot it cheap, you should not rebarrel it to .308 Winchester. The strength just isn't there.

Personally, I'd buy 40 rounds of Norma ammo and either get someone to reload it or learn to reload myself.....it's a truly powerful round.

As a side note, to buy milsurp ammo for this you probably won't be able to reload unless you purchase special dies and cappers because of the berdan primers used, which have two flash holes instead of one and the anvil is part of the case not the primer.

25lieb
You don't say if you reload or not but if you do here is a suggestion.
I have done this for a few of my Military surplus rifles including my 7.65 Argentine Mauser as well as a Mas 7.5 French Semi.
Get ahold of some military surplus ammo in the caliber you need.
They make a little thing that looks like plastic hammer which is a bullet puller and is pretty cheap and easy to use, I think they still sell them at Mid-Way.
Junk the old powder and bullet. Now you have a primed case to load anyway you wish.
Here a few years back we got ahold of a huge lot of 30-06 surplus and did the exact same thing and are still shooting them today. Most of this surplus has FMJ which is not a good hunting bullet and should be discarded or melted for cast bullets.