Jordan, including the M version?
What I'm wondering, too. Probably academic at this point. The 175 X has the thicker base jacket but a much bigger cavity in the nose. Where the 180 M doesn't have the thicker copper at the base but has a smaller cavity. And, I guess if you're shooting factory loads the 180 M Hornady at 2,812fps is going 64fps slower than the 175 X Hornady load and 115fps slower than the 175 X Federal load if you're getting the same numbers I am. Maybe the ELD M at factory speed is the best of both worlds - fantastic way out there and perfectly adequate up close. Thank goodness they didn't load it too fast!
