Mounted the one I got on a M70 300wm and went to the range to sight it in today and do some load development.
I had a Vortex Diamond Back HP 3-12x42mm on this rifle previously and I just haven't been happy with the Vortex since the first time I looked threw it when mounted on a rifle. Anyway the Burris E1 is a step up in glass quality and I could see my shots clearly at 100yds on the target where I had to use a spotting scope to clearly see my groups since the groups looked fuzzy even with the side focus adjusted on the Vortex.