Broncoformudv;
Unfortunately, with a 54 cal your options are limited. As I mentioned in my PM, the Barnes MZs have proven best in accuracy in my Knight 54, howver the only sabot for the true 50 caliber bullets is the MMP purple and they are difficult to load as they are somewhat oversize at .546-7. As was suggested by others, use either the Harvester or MMP sabots sized to accept any of the .451-2 bullets. I suggest the Harvester as the MMPs are only rated to 90 grain charges (see the MMP website). I have tried both and the Harvester sabots held together with 110 grains of BH209. The MMP sabots completely failed with the same charge.
I am convinced, to obtain the maximum efficiency from a 54 cal, a true 50 caliber bullet in the MMP purple is the way to go. Just count on a Hoppes wet patch and two dry patches between shots. I believe this bullet, sabot and swab procedure will go "bang" in all weather conditions.
Hope this info helps.
Bill V
