Originally Posted by PeteM
This batch of Express are not flat inside, but the Mozzie's I have, are flat in the back.
My Steyr 110 loves these as long as I clean the barrel every 100 or so. 6 to 9mm groups at 55 yards.
found in mozzies with the flat were pants,i got give some jsb express with flates i could not get them group to as tight,and as good on groups,i woz just wondering if its still happening with jsb express,this is running a lg100 barley twist which only clean every 300 pellets or so with felts which dont really clean the barrel propaly