If the sabots are blown apart with the petals missing or you get flyers then the charge is too much for the sabot, there is an excellent sabot write up on "inspecting sabots for bulletperformance", here is a google of that:

http://tinyurl.com/6eyxlm

I believe this was the article I read: http://www.gunweek.com/2004/feature0610.html

In general most MMP and Harvestersabots seem to work pretty well, even in Savages shooting 2300+ fps. Chap Gleason