I bought this AIII in 1983 (I was 17 at the time) out of the Penny Saver in California. It was chambered in 280 Rem Imp at the time, but the throat was blown way, way out.
I still hunted with it until about 1990 then it went to the back of the safe for 30+ years.
I recently rebarreled it in 243 Catbird using a Hart blank.

Tony

[Linked Image from i.imgur.com]

Run it up, until you blow it up, then back it down a bit.