I have had two different 7mm Rem Mags have one shot high on the cold bore shot and then put a nice 4 shot group together 1 MOA low. It was consistent and predictable, wether i had been shooting it first or shooting other guns first, hot days, cold days... very consistent and no other rifles i have owned (20 or so savages plus another 10 center fire remington, browning, TC, Ruger) have ever done this. in spite of what some think, it can happen.