Yes, I have the same problem with my latest batch of ACME. I can load 124 gr from Extreme and all are fine, plunk test and gauge, but the ACME's failing both tests. I measured the sizes of both and found the Extreme to be .356, and the ACME to be 0.3565-0.357, just a few thousands, but the effect is quite drastic. I checked everything, and followed all recommendations I could find here, but the only difference was the bullet size.
Maybe I should talk to ACME, too.