I have a TX200SR in immaculate condition.
It has a small problem with consistency..
It shoots AA 8.4gr at 770-775 fps and every 4-8 shots one or 2 shots are slow [in the 740 to 730fps region]
The recoil also feels different for the slow shots..
I have changed the main spring and guide to a custom Maccari kit, piston seal and breech seals.
I have relubed everything correctly but it still does the same.
I have tried JSB Express pellets and the same thing happens...a slow shot every now and then..
Accuracy is very good but the consistency worries me...any ideas?