Good idea to see what other people have tried and tested

My Steyr challenge likes JSB 8.4g 4.53 headsize
Daystate rosso Redwolf .177 likes Daystate heavies (although it shoots well with Air arms and JSB)
Air Arms TX200 .177 likes Air arms 8.4g 4.52 headsize
Air Arms Prosport .177 likes the same as the TX200
I have two TM1000 rifles and one likes JSB 8.4g 4.52 headsize and one likes air arms 8.4g 4.51 headsize