jaybe
My experiance with "crush rib" sabots is limited to an A&H and one of my Remingtons. They do load easier than any sabot I have found with a .4525 Speer bullet packed inside.The regular sabots that I use the Nosler or MMP HPH-24 work really well for me in these tight bores, but from what I read the some of the Omegas are even tighter and really might need that "crush rib." I would love to experiment with an Omega 1st 2bd 3rd shots - but we do not see to many of them here in the Pacific Northwest because we can not shoot 209 primers during ML season.
Are you shooting an Omega?