Re: Slope-Shot ?
I prefer the ACI by sniper tools. They are around 100 bucks but are very compact and stay on the rifle. You can also get them engraved with either angle cosine numbers or actual angle in degrees.
Sniper Tools Design Company - angle cosine indicator
Long range shooting is a process that ends with a result. Once you start to focus on the result (how bad your last shot was, how big the group is going to be, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.