My original post was prompted from what could be direct observation of POI shift with tempertature. Certainly the POI was shifted but was it temperature or perhaps my hand was getting tired and my aim was getting sloppy. I was shooting a SRH in 454 Casull with a 7.5" barrel. If I had a vise I could lock it up in and try it that way, I would know - maybe someone else has done this?
