I've got the brother to this one, all cased up and with the Fraser (Davidson's??) telescope. I too believe Fraser used a 95 or 96 action for these, though I'm not 100% positive. What little research I've done leads me to believe that the .303 Fraser is NOT the 7.65ARG. It uses a Mauser case for sure (in order to feed from the mag) but I think Fraser loaded them himself with Brit 303 bullets (highly regarded at the time). There is a "Fraser's .303 Velox (or Veloplex??)" label in mine. I can't remember what marking the barrel has. I had a chamber cast made and the guys at G&H researched it some to come up with a different answer than 7.65ARG. Mine also came with a handful of fired brass however, it is all just commercial 8x57 so I'm sure it was resized. I haven't fired mine, yet. My advice is to do a chamber cast just to be safe. Hope this helps some.
I know. I know. Worthless without pics! Trust me, being away from my guns and having to rely on memories is even more maddening for me!
Sinner, I would be interested in any notes on Fraser as well. As I understand it the records were lost during the war.