DrAsus

I can only speak for myself, I have a new Triumph that when I first got it I did not think I was going to any sabot down it very well, including 'crush ribs' but today I can load most anything I want to. I use the thick Blue MMP 40/50, I use the MMP-HPH24, and the MMP Orange .458/50 sabot. I shoot 110/120 grain T7-2f loads from it and it is accurate gun.

For me to be able to load these thicker sabots - I did have to do some bore polishing with J-B Bore Paste.