True BC of Sierra Bullet

[milo 2.0]

Anyone care to divulge the true bc of Sierra's 7mm 180gr smk. I can find .660 listed, but I think I remember it was posted on Berger's website sometime back.
Berger 180 hybrids are nowhere to be found, and I'm not certain I'll pay over 45.00 for a box of bullets.

 

[jbailey]

Why would Berger's website have the BC for Sierra's 7mm 180gr MK?

0.660 G1 was the number I was given by a knowledge shooters who was using them in F-class. Don't know if that is a good number or not because I couldn't get the 180gr SMKs to chamber in my 7 SAUM chamber (it was cut to 180gr Berger Hybrid). The ogive profile is radically different between the two bullets.