I've never owned a 320 but I did have a 310 for a short while. I bought it in the mid 80's for $60.00. It was in virtually brand new condition but someone had put on a Lyman globe sight and an aperture on the rear. I took the sights off, put on a cheap 3/4" rimfire scope and sold it. I might have kept it but I didn't like the pressed checkering.
I'm not so big a snob now and wish I had it back.
