Twist rate on stx liner

[Bigragu]

I have the chart that shows all the different twist rates saved. I’m asking about a slug A liner, in 30 caliber and 600mm in length. It isn’t on the chart. Anyone know the twist rate. I forgot to check it externally before I epoxy’d a carbon fiber sleeve over it.

if you have this info let me know, ok, and thank you.



BR

 

[biohazardman]

Thought I had it but I do NOT

 

[knifemaker]

Big, just do it with a cleaning rod with a very tight patch. . Push the rod all the way to the end. Put a piece of tape pointing straight up at 12 o:clock. Now draw it out 1 foot and do the math, or if you wish, all the way, until the tape is at 12 o:clock again. Measure the length between the two 12 o:cocks. This is your twist rate. . 

Mike 

 

[triggertreat]

I measured my Slug A 700mm in .30 cal and came up with 1:26.75 twist if that helps.

 

[Glem.Chally]

Yeah from fxusa the 700mm slug is 1-26, not sure about the 600.

 

[Bigragu]

Thnx, all. I knew of using the cleaning rod method, just being a lazy a$$ is all. I thought maybe someone already knew off hand. Weird that it’s not on that FX chart. I bought it recently from UAG. It was the last of their slug A liners, and I got lucky cause a 600mm was exactly what I needed for my hatsan bully barrel conversion project.

 

[Knightjustice]

According to their site pellet liner A 600mm is 1/40 twist rate