I have a set on one scope and like them. Yes, pricey, but they are a clean look. I had an objective cover stop "locking" back and Leupold replaced it under warranty. I have a couple sets of Butler Creek caps but they can...and I have had them come off in the field.
My brother is expert at losing Butler Creek caps. It’s fruitless for him to use them, he’s actually given up.
How many do you have to loose before you just tape them on?
In any case, the newer Element series seals up nice a dcwint slide off on thier own.
On some issues some people are slow learners. That being said, I believe he did try tape and still lost caps.
We mostly spot and stalk. He is one of those guys who can/will throw his pack on and sling his rifle over his shoulder and walk for miles and hours. It's the pack or vegetation that cause the Butler Creeks to come off.
He says he once read about elite soldiers running for a hundred steps and then walking for a hundred steps. This enables them to go pretty fast and have endurance. So he tried it and uses that technique when he wants to cover ground. I suspect the running with the rifle interacting against the pack pulls the caps off. Whatever, his choice. Still my best hunting partner.