42.9 H4350, 140 berger Hybrid 10-15 off the lands, that's the upper node, there will be another around 41.7. Problem with Creedmoor and high bc bullets like the 140 hybrid is they can be long if you are running box mag. Standard creed reamer is .199 fb and I went to the match fb of .170 and that helps a little but I still had to run Alpha type II mags in my chassis, as well as notch the feed ramp. I've since abandon the Creed and went to x47 for both of my comp rigs. No mag issues there with 140s.