BSA Ultra

[BigTinBoat]

Ok so I opened it up and put a HI Flow Transfer Port and added a spring guide THERE WAS NO VALVE RESTRICTOR in the rifle so somebody was in it before me I'm shooting Hades 26.59gr at 496 FPS with 13.9 FPE guess I'll live with that I started with 380 FPS with 8 FPE

Next time you have it apart take a pic of it. I can pretty much guarantee it has one in it. You will see a "circle" just looking at the valve. Also put a drill bit inside the tp (biggest one you have that will fit) and see what it's diameter really is.

Edit to add - that 14fpe is just about EXACTLY what the gun with a drilled TP and the Restrictor in place will put out.

 

[BigTinBoat]

Also measure the ID of the valve. If it's 14mm there is no restrictor, if it's 11mm the restrictor is still in there.