I had a UK Neil stripper on my steyr and he told me after testing on an Air Arms s400 he found the gap of 3.75mm from crown to rear of cone was best in .177
MAD for it.
Steyr LG 110 Gary Cane, Leupold 2.5-8x36 TMR
Member of the UYK, UYB, UYC, UYH & UYE club.
I would like to agree with you....but then we would both be wrong !!