Would someone with a 1:66 twist .50 caliber do me a favor? Try the load discussed in the original post . . . I'm very interested as to whether it was the twist or the extra heat/pressure on the sabot. I'm even willing to mail a tester some sabots and .440 round balls. I can't close the page on this one until I know which issue caused theaccuracy to go south. Thanks. Roscoe.