Well on my lite 375H& Sako I ran a low power bushnell on it, then for a lark I put a 1.5x4.5 Tasco world class on it, and have not failed it yet, so it stayed on and has been on for a quite a while and more than a few loads, from 235 grain bullets up to 300 grain Partition bullets, or 300 grain barnes.
So it works for me.
Haven't lost a bear or moose yet with it, most hunting up the Alaska Highway.
