mgdietrich said:copperhead is improved 40X action
2500X was built to compete against Turbo and Falcon
No doubt in my mind, I would get a 2500X of those two choices. Doesnt have the large barrel shank needed of the Copperhead.
Stiller makes great stuff! I would look at Killough Sports page, he carries all the major actions. I use a 10X action for smallbore prone, it is a hammer!