After reviewing some comments regarding stuck bolts and my only really hot load and what rifle it's used in. A useless thing happened, I had a thought. I have never experienced sticky bolt. I have loaded hot enough to make ejector marks. Not as bad as one posted today but they are there. Others reported sticky bolt but nothing else. We know all the metals involved in the firearm and ammo have elasticity characteristics. so Is 'sticky bolt' caused when the pressures of the firing process cause some elastic stretch in the chamber such that the brass goes beyond chamber dimensions and when the chamber contracts the brass is captured?