Paul,

My advice is to purchase a variety of sabots. I often buy from Graf & Son's as the have Harvester sabots for $5-7 per 50. I know many are fans of MMP and you can do the same with their products.

I then try different combos to fine the best load. I suggest the Harvester Crushed Rib, Smooth for less that 300 and smooth for more than 300.

If you call Harvester, they will probably send you samples of all.