I'm using alpha i my Creedmoor. Haven't done extensive load development yet. I have observed that it takes 2.5 - 3.0 grains less powder to get the equivalent velocities predicted by QuickLoad. You will definitely want to back off of your normal starting loads ad be cautious when you work up.
That said, Alpha bras has no equal. Amazingly consistent. I weighed all 100 pcs that I bought. The max case weight weighed 0.8 grains more than the min case weight.
How uniform were the neck walls?
