Fitting a barrel for Pierce and Stiller Predator actions

[SteveOak]

Headspace aside, are the threads, thread diameter and tenon length the same for a Pierce and Stiller Predator actions?

I am buying a barrel that was fitted for a Pierce action. I don't know which one, I can find out if that helps but the chambering is 6-6.5 X 47 Lapua.

Is there a chance that it will fit directly or perhaps with small fitting adjustments or is it going to be a cut it off and start over?

 

[JRS]

Are Pierce actions 18tpi, and the Predator 16tpi?

 

[Shooter264]

Yep Pierce are 18Tpi and Stiller are 16 TPI. Won't work without cutting threads and starting over.