I've never used them. A friend did, and you could tell the expansion was rather quick. He said it was the first deer he didn't get full penetration with, and when he skinned it, the bloodshot meat was extensive.
I continue to use 170 grain Hornadys in mine, that's what the rifle prefers.
This is what I’ve seen when a couple of friends tried them. Dead is dead I guess. Very rapid expansion, more meat damage than traditional 30/30 bullets, and less penetration.
