Semisane

I can offer a partial explanation... The polymere formulas for the harvester and the MMP are different. It is my belief that MMP sabot is more pliable than the Harvester. Because of this the MMP molds itself to the lands and the grooves tighter than does the Harvester. Because of that I believe the MMP holds the compression a bit better.

The problem comes with HEAT... the Harvester polymere is less affected by heat than is the MMP and because of that appears to stand up to powder hot loads or warmer barrel better than the the MMP.

I made these same statement to Del Ramsey - he question my belief that the Harvesters could handle more heat, both heat of the load and the heat of the barrel and wanted to see pictures.



I sent hime these pictures because I felt that the MMP was on the verge of failure - he disagreed about the failure but did agree that the cups were showing signs of stress. These sabots were shot using 130 grains of T7.

Semi in my velocity comparisons I found pretty much the same velocity differences you are indicating.

Del did indicate that he was test a new formulation of MMP polymere as soon as time would become available. It has not happened as of yet.

I can not stand on a box and tell you that I got noticeably better accuracy from one sabot or the other - but I use the MMP 90% of the time.