The shoulder of the bullet is hitting the edge of the chamber on the EGW guage. If you load it shorter, you should be able to get it to seat properly in that guage. I have found that the EGW guage is tighter than every barrel I own. I have overcrimped in the past due to this. This is why I, along with others, switched to the hundo guage. Sent from my SM-G970U using Tapatalk