i know what you mean as i have got 6 tins left of 4000011's (3) 4.52's but i have just brought off another forum 6 tins of 14006711 (1) 4.52s so i hope these are good too !.
sorry i can not help but i will be running out soon so i hope these ones will be ok for me..... but i am thinking about getting some 4.53s to test & maybe go to them in bulk if they shoot better.
My rifles are =
PCP: Steyr lg110 hft 2014, HW100 SK ( back up & rainy day rifle )
Springer's: HW77 ( 1980's version ), HW35 KLS.