I plan on taking my recently purchased Remington 700 8mm magnum to Africa next year. The rifle came with a pre Monarch Nikon 4x scope. The rifle is a late 80s vintage and I'm assuming the scope is the same. It is clean, clear, doesn't fog and has held zero perfectly through my initial load development. I'm not looking for advice on fixed vs. variable, more power, etc. I've found that for deer sized game and larger, if I can't hit it with a 4x scope, I probably shouldn't be shooting at it. My concern is reliability. Am I risking failure with every shot? Should I replace it with something more modern?