John,
I have to admit almost all of my X and TSX experience was 30cal and above but I'm wondering if your experience with the 257's might have been that the petals blew off? I've done that overdriving the 30cal X with a 300RUM on close shots. Ended up with a 30cal solid.

I am continually astounded at how quickly people make up their minds on little evidence or none at all.
Jack O'Connor