So I have a bit of a puzzle here. I sighted in my .270 today at 100 yards. The first shot, cold bore, was dead on but 3.5in high. Subsequently, the next 4 shots were dead on and 1.5in high in a quarter sized grouping without any adjustment made to the scope. I know you're probably thinking I pulled the first shot up, but I have a pretty good bench rest setup and it felt exactly like the other four. My feeling is that my gun shoots high with a cold bore because on a bull and a buck I shot last year, I missed on my first shot on both animals, but my second shots were both perfect. Has any one heard of this or know what might cause it? I am planning to do more shooting to see if this is consistent. If it is, I'll just plan on aiming lower on my first shot. Thoughts?