Have tried 2 other scales only to find them inconsistent.
Have ordered a set of these, will post results
Air Arms S410F .177, AGS 4-16x50, AAF 4.52
Air Arms S400 MPR FT .177, MTC Viper 4-16x50, AAF 4.52, Cloverleaf service
BSA R10 .177, MTC Viper 10x44, JSB Exact 4.53, MWSS200 moderator, UKNeil adjustable cheek riser