We use the Berger 70g in our 1-9's, a fellow F-Class shooter turned use onto them, there are amazing at 600 yards.
Sierra 69g MK BC= 0.301
Hornady 75g HPBT Match BC= 0.395
Berger 70g VLD BC= 0.371

As you can see the Berger BC is much better than the Sierra for being just one grain heavier and not far behind the Hornady for being 5g lighter. Would have to look at the load to be for sure of the charge ( my memeory is not as good as my forgeter), but we are using Varget powder and like I said the shoot great out of 1-9 barrels.