I just shot all three with an identical charge, bullet, rifle. The results arent surprising.
43.1gr H4831SC, 115 DTAC .020" jump
Alpha
AVE - 2858fps, no pressure
Lapua - 2880fps, pressure signs, shiny headstamp, ejector slot marks, no hard bolt lift, 1 round crunched when seating the bullet.
Peterson- 2908fps, pressure signs, shiny headstamp, ejector slot marks, hard bolt lift, all three rds crunched when seating bullets.
The Alpha looks very promising. Might get the quality and capacity. Looks like you have some room to work up there.