I have been using the Harvester yellow crush rib with great results on the Barnes Spit Fire MZ and TMX in both weights. I have also had very good results with MMP's 3 petal sabot on the Hornady SST in 250 and 300gr. Very easy to load and accurate. My most accurate load in both my Knight LRH and MH has been with Harvesters Scorpion PT Gold 300 gr, their black crush rib sabot and 110 grs. of Blackhorn 209 using CCI 209M primers. Best 3 shot group at 100 yds was .297 inches.