I also found none of the others offered this contour to finish at 25".
You're pretty specific here for a "why not?" answer...but, whatever.....lol....
I don't believe I've ever had a barrel longer than 24" and thought maybe it would be more efficient with the larger powder load.
Dogcatcher 223. I love Shilens, but use others occasionally. Shilen would not make that contour at that length for me.