ORIGINAL: eatsleephunt
What does orange mmp stand for, and I assume by black crush rib you mean a sabot shroud? Not sure, see I don't know very much about this.
Dan
Allright, I'm looking in the Cabelas catalog and I'm seeing the mmp ballistic bridge sub base sabot, and what appears to be an orange one called "dead center"sabots. I also see TCshockwaves, barnes MZ's, Hornady sst, etc. So you feel the MMP's and perhaps the Barnes are the best?
Orange Sabots are available here:
http://www.mmpsabots.com/
Here is the sabot and what bullet diameters they fit:
Note that the orange sabot will fit .457 and .458 diameter bullets. Most ML 50 cal bullets are .452, the Orange sabots are thinner since the .458 bullet is .006" bigger. Chap Gleason