If your not pushing them in the 2900 fps realm stick to 175 SMK's... I have done some loads with 155 SMK's @ 2750 fps (give or take) and have decided to stick with 175's out of my OBR. I don't run hot loads under my semi's for fear of over gassing them.
I have run the numbers many times myself I cannot make any bullet beat the 155 scenar at any velocity. The 155 in Litz's program win at every velocity I run them at. Im not claiming to be ay expert but I'm not sure they can be beat. At least with Brians program. I will say maybe other 155s are slicker in the but in general it looks to me like the 155s win. I did not run any 208s or 230s or 190s for that matter. Thoughts?
I can't seem to find any of the scenars locally, but I did pick up 100 155 SMKs. I plan to use these to see what velocities I can get with this weight of bulllet from my 18" OBR. I'll report back.