bea175,
Yeah, the 155 Berger would be far better matched with a .308 Winchester than a .300 magnum. The 168's also very good in the .308--and .30-06.
Since we are so close to the answer for 300 win mag and a buddy is having one built... and doesn't want mono bullets likely...( 168ttsx if he would was my suggestion- shooting basically deer only) then I run 185 bergers in my 308 and moving to the 200ish hybrids... what would a normal person run in a 300 win mag? 185 or the 200 whatevers, to prevent old ballistic tip type damages?