Myself..I like the harvester sabots over the MMP...i found the bottom cup sides are long and they fray ..finding them after been shoot shows lots of small tears in the cup where as the harvesters dont have any...Dave has a pic on Jon's forum showing the 2 side by side shots...the polymer plastic in the harvester seems like it has a lube built in it so they load tight and easy...I had to struggle a few time with the MMP...we were trying some .458 bullets that came with the orange MMP sabots and they were eratic on the target..when switched over to the Harv sabot the printed nice on the target...and they loaded way easier than the orange one..you had to stand on the rod to seat the bullet..