Stonecold,
I have been hunting whitetails here in Maine with a .243 for a few years now. (Switched from 30-06) I have shot five deer with the Winchester factory loads,(CXP2 100 grain bullets). All but one shot was a complete pass-through. Excellent blood trails, although two of them dropped where they were standing. I am getting less than 1" groups at 100 yards with this ammo.

Good luck, MH