A 95% 320 is in my squirrel rifle rotation. 36g HP Mini Mags are about as accurate as anything out of it. Shoots good enough to be treated to a new 3-9x33 Leupold scope.
Passed on a 99% 320 missing the bolt and mag for $120 at a show last year.
Passed on a 50% 310 for $150 at a local shop earlier this year. I would like to get a 310 but this one was very rough.

I bought one five and one ten round mag at shows for $40 each.

Funny... there is a listing for two 320 "bolt carriers" listed on ebay right now. shocked I don't think I'm interested.