I didn't have a proper cutting head for a mill.
So, I resorted to a sanding drum with the flappers on a dremel.
It took some time and frequent checking with a mike.
But, I got an excellent tight fit.
The underside of trunnion needed some fitting for the larger
7.62 mag. The rivets in the magwell do have a longer way to go,
I used some longer 74 rivets I had for this. Also had to grind down the
mashed heads a little bit so the mag would clear. It's a tighter fit.
The feed ramp also needs taken down for the larger cartridge diameter.
More dremel and drum work.