Can someone please help me with the twist rate of standard (factory) 600mm STX barrel liner in 5.5mm?
Depending how old is that rifle, i think the 1st ones had pellet liner A. The newer ones will have pellet liner B
They all come with the pellet A liner.
B liner is separate for 25gr jsb in 5.5mm.
Slug liner shoots the 25gr well enough that the B seems to be pretty much pointless
Last edited by Macros; 18-08-19 at 07:35.
Thanks so much!!