First thing, THANK YOU HARVESTER for the amazing crush rib sabot! I don't know why, but they've been the most accurate sabot for me, in quite a few rifles, over the years. I've used the 40/45s( wishing for a 357/45) , 44/50s and 45/50s. All gave the best results in the rifles I used them in. Today takes the cake though. I tried some Hornady .451 200 gr XTP's with 70 grains of Swiss 3f. 5 with regular Harvesters and 5 with crush ribs. The regulars hit + 2 3/4 at 100 and grouped 5x 4 1/4. 3 of those went into 2 3/16. The load tension was very light, so I thought these results rather good. The crush ribs went to the powder with 1 finger! I figured shotgun pattern. Nope! Hit + 3 1/4, 5 x 3 1/4 and 3 of those were in 1 1/4! I don't get why the crush ribs do this. Being a looser load, they shouldn't be the more accurate. Nevertheless they are. Both groups had 2 flyers. I think because the sabot petals are too long for such a short bullet and it may effect separation. So. Hail to the Crush Rib! Btw, the rifle was my 22 inch stainless TC Thunderhawk, with a bead and aperture sight set. Bore diameter .500.