Ok, here is a little more info. I can take a fully prepped case that fits perfectly into the case gauge and chamber it. It ejects with ease. As soon and I load it, it becomes super hard to eject. Something is happeneing during the seating stage, but I can’t figure it out. I’ve measure the case for overall length, diameter at the mouth, diameter right before the shoulder, right after the shoulder and then again back by the rim and all of these measure within spec. It’s so weird!