Can't find definitive but fairly confident was above the 3mm TP values below.
268 x 36 lb/inch PL 67 Hobby 7 gn 10.8 fpe , SD 8.3 gn 10.3, Exact 8.5 gn 10.8, Bisley 10.2 gn 9.8.
For info. 268 spring now cut to 250 rate 40.6 lb/inch. Energy still near 11 with exact/express/FTT 9+ with Bisley.
Gone to owner for appraisal. His first shot rang 3/8" bell at 20 yds. standing unsupported.
Can't say shooter or rifle but promising.
Will report back after a bit of bedding in and try to be more diligent with recording data.
Many thanks to everyone.