Yesterday I loaded up my first 20 of these 150g SMK for my 6.5CM. I know alot of people have had trouble getting 1/8 twist to stabilize these. The ogive is very long making the jump to the lands very long despite my seating them to 2.891". My rifle has proven to shoot most things very well regardless of conditions. It has a 26" shillen 4 Grove ratcheted rifling barrel. I'll be going to the range here in the next two weeks to make some groups on paper. Let me know if you think they will group or fly catewompus!