The FX STX Pellet Liner B is a barrel liner that will accommodate pellets
with a slightly larger head or skirt size. Some common pellets like the
H&N Barracuda’s & JSB Monsters have a slightly larger head size or skirt
size. These pellets perform better in the B liner compared to the A liner,
particularly at longer distances.

• .25 calibre
• 600mm length (Only fits 600mm Smooth Twixt X barrels)
• 1:16 twist rate

Below are some popular pellets the individual caliber B liners were
made for. They can also work with pellets with similar attributes.

.25 caliber = JSB Exact King Heavy MKI 33.95gr

.25 caliber = H&N Barracuda 30.86 gr