MakeMineA10mm:
You may have already found out by now, Western Powders ballistics engineer has been busy working up BPCR load data for Blakchorn 209.
Go to Blackhorn site load data:
http://www.blackhorn209.com/loaddata/
and click on "view all load data as printable pdf file" to get copy of load sheet. Pay attention to notes at bottom of chart.
Of course this product isn't for the Holy Black purist. But, I admit-I've tried it in my .45-110 rifle. If you like the other BP substitutes, the you going to love this stuff. It really does do everything Western Powders claims.
It doesn't say so on his load sheet, but Blackhorn engineer advised to use solid crimp on case to get most consistant velocities.
Arctosman