Jon something occured to me today - I don't do it but it makes sense.
Get a collimater and after (!!) you zreo your rifle, use the collimater to figure where your crosshairs are now. Record this info somewhere and you can use it to verify that your scope is still on. Note - you do not adjust your scope in any way, shape, or fashion - just check where the cross hairs are after zeroing.
I have covers (Butler Creek) on my scopes to ward off the rain. It usually works well. But a lot of us have rain rifles for wet days. Mine for years was a Marlin .30-30.
"I don't make enough money to buy cheap stuff" - Mark Manning