Can anyone tell me the exact inner diameter of tge .25 cal stx liner, both lands and grooves. Its the liner that came stock with the gun so not the superior i dont think. Also, would like to know the twist rate of this liner.
Smooth twist x inner diameter
- Thread starter Stewy1412
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I would push a pellet through the liner and then measure it. Each liner could be a little different.
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One more point. Every barrel is different.......slightly. So if you really want to know the inside diameter, you need to use a set of pin gauges. Most machine shops will have a set. When doing this you need use the pins like go/no go gauges and you need to measure both ends of the barrel because most are choked. As these barrels are forged, you can use the depth difference between the lands and grooves on the OD and assume the reciprocal.
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My 380mm pellet A liner on my Crown is .210" at the muzzle. Absolute tack driver with most pellets.
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