Dominick, The sabot fitting right is very important to accuracy, and safty, to loose and it woll not only be inaccurate but can move up the barrel and create a barrel obstruction, the MMP12 and the MMP HPH 12 usually fit over size barrels like on the Knight and the White the MMP HPH 24is made to fit .451 and .452 in a .500 barrel and usally fits TC barrelthough I often us a crush ribuntill they are broke in [ first 100 to 200 shots].
I keep several different sabot available and when I purchase a new gun I take out the breach plug scrub and brush the barrel real good [ In case there are any burrs] andpush different combinations through, a tighter fit than most people like is what has always shot good groups for me; but don't get me wrong because if they are totight to load smooth then they are not going to shoot good they have to be just on the tight side of a happy medium; the exception to this is conicals like the Real bullets, Sabor Tooth, power belt and maxie ball They load and shoot different and some people are stuck with them because of the laws. Some people try to say that the TC inlines wont shoot them but I experimented with them for a while and I dont knpw why they say that I have quite a few TC gun several being inlines and I have no problem getting them to shoot 3 or 4 different conicals each, so I think that likly just a rumor the compitition started. Lee