I like the older Leupolds. I thought and maybe I’m wrong that the old M8 line of Leupolds were the toughest of the lot. I have some old variables too. But ever since I was a teenager I had the belief that variables were weaker. I think I have a M8 4x on my 375 H&H AI - I have not shot that other than at paper, but that’s held up so far.