need ballistic coeficient

[44mag1]

anybody know what the BC of an RCBS 7mm 145 silhouette boolit is?

[MtGun44]

Only way to know is to shoot it at different ranges and see how it drops. Most of the old
BCs in books were estimates. A given bullet will give a different BC from different rifles, too,
altho usually a small difference.

Bill

[Ford SD]

from rcbs cast bullet book 7mm-145 sil BC=.272

from rcbs cast bullet book 7mm-168 sp BC=.306

[44mag1]

thanks