Are you absolutely certain of that "6.5mm" designation?
I believe that it might be a misprint for "7.65mm," or .32 ACP.
If it's a true 6.5mm, it's some sort of unusual .25 cartridge. That would be very strange, since it then would be a woefully underpowered gun.

Gee that takes all the fun out of it. I was thinking some really weird pistol that took the 6.5 x 47 Lapua.

It sold before I could find out if the 6.5mm was a typo

Billy

As mentioned, 7.65mm is .32 ACP and in my opinion it wouldn't be my first, second, third, fourth or fifth choice, but it's way better than nothing. Actually, on reflection, it's right down there at the bottom. .25 ACP would be lower as are some of the really esoteric calibers such as the Kolibri (sp) and the Velo Dog.

Originally Posted by Sgt45

...[R]ight down there at the bottom...are some of the really esoteric calibers such as the Kolibri (sp) and the Velo Dog. [emphasis added]

...Oh, I dunno.
There are some dogs I could throw that would deliver a pretty good defense.