If you get a good brake, you will be so amazed, that once you get used to it, you will likely end up seeing a full FOV or close to it on 20x or higher.
Part of it of course is much is the overall weight.
When my son was 9 or 10 (can't remember now:confused
he was shooting a lightweight 260 rem MOA maximum (LER scope though).
For the last two or three years he shoots every SP I have, and the majority of them have rifle scopes on them (Now 14 years old)-including the 7mm Dakota XP, and that was before Holland had made the new Radial Brake that is now on it. Kirby's New PK brake should be along the same lines as Holland's, but I just haven't had one for comparison, but there is good info out there on how effective they are on rifles.
Your wrists will likely take less abuse with your 6.5-284 than they do with light load 38 Specials in a model 66 or 686 S&W revolver.
Fear is a normal thing first time on in this area.
Just give yourself all kinds of room on your first shot, and then, after that-it wil be a cake walk in the concern about your wrists/face being hurt.
Recoil will be different depending on the type of grip and surface you are shooting off of.
I shoot both rear and center-grip SP's.