I've been playing with 200 pcs of Alpha brass and have been underwhelmed. Running 105s, I have a node at 2920 (31.6 IMR 4166 / 31.4 Varget). It won't shoot the heavy 6mms though. At 2810 with 112 Matchburners, I'm running slightly sticky bolt with 31.4 Varget (this is my low low node with Lapua) . Seems like it's ok for the 105s, but won't handle the 110+ bullets. Lapua is just the easy button. No issues, and you can find hydroformed brass for ~$150/100 vs Alpha at $115.
On another note - does anyone have experience with the Alpha Dasher reamer? I'm thinking about just buying that or the PTG Dasher reamer instead of waiting for my customer spec from JGS. Aside from freebore, the Alpha reamer is darn near identical to mine.