.505 is their claimed and actual BC,though of course atmosphere and temp particulars,do change all BC's every day. The 155 Scenar's supeerklative BC is easy to glean from even a casual glimpse as it's length/profile readily concur. Set it next to 168 or 175SMK's,for conversation. It smokes the newly reconfigured 155 Palma SMK as well. I shoot the Scenar by the jazillion and my elevation erector's have no bias built in.

As an aside,Scenar terminal affects are far more reliable than the oft touted SMK,espoused by the Mall Ninja Faction. The Scenar's faux nosecone,is a simplistic and effective approach to increasing projectile length,while adding a favorable BC profiling to a given weight.

I much prefer V-Max and A-Max upon Critters,to the oft touted NBT. Prefer Scenar's to them as well.

Lapua BC's are spot on,as a minimum.........................