cayuqad,
I've been using the Harvester Black crushed rib sabot with the .458 bullets so far . They are a pretty snug fit, in both my Genesis and Triumph especially after several shots. I'm thinking the orange mmp's will make for a better fit. Do they shoot accurately in you Genesis? I've got a few left over. I originally tried the oranges in my Savage but found them to be too loose. I think they measured .504 with a .458 bullet. The Black crushed ribs measure .507 with the same
Zen