I have only used the 178 ELDX version and shot them to 800+ but my dial ups were spot on using the advertised BC with every ELDX or ELDM bullet I used (refreshing after using mostly nosler the last 10 years). I am shooting the 178 ELDX at 3180 fps out of my 24" barrel. Worked really well on taking two bull moose this past fall.
Thanks a_l, it is good to know that the numbers are accurate. I presume you are shooting a 300 WSM? I think these probably sell a lot slower than 208s (might be wrong) with people chasing BC, but I am looking for a 'higer velocity' option and the 178s does have decent numbers for their weight. I got a new light palma brux barrel for my 300 wsm that will be finished at 28" and it should be ready to go within the next month.