Dave Reid -- you said:
105 KIAS was the actual speed at the apex of the loop; 350 KIAS was the target speed at the entry to the loop (actual was 310 ± 15 KIAS).
How do we know what the IAS was? Was there a flight recorder or a cockpit camera? A problem with the pitot or static vent? A mechanical problem (e.g. stiction) due to the a/c being flown infrequently? As the pilot has no recollection (perfectly normal and understandable) how do we know what was 'indicated'?