To some degree it depends on just what you mean by butchering, as noted splitting a pelvis or a brisket is a different task to removing a cape properly. I personally have never gotten two wound up about actual edge angles, I truly think we can greatly over think sharpening when it comes to PRACTICAL applications for a knife on the field. There are three important things to the task... sharp...duh you say, but I really just mean basic SHARP, the knife cuts, cuts easily and without forcing it through things it should cut, just about any good edge will do this. It also needs to be resilient as field dressing is very different to butchering on a timber bench or cutting boards, there will be muddy and thick hides to deal with, rocks that appear the moment you push a blade through, a joint you just can't find no matter how much you twist, saw, turn and jam that blade around. And finally it needs to be able to be renewed in the field EASILY as no way in hell do you want any task beyond a quick lap on a small steel or field strop if required.
I have had GREAT success with simple "shaving sharp" V Edges applied with a Lansky at home and renewed on a small steel. As I have grown more refined in my old age, a nice convex edge applied by the means you are most comfortable with (in my case my Worksharp KO) and maintained with a ceramic stick and strop in the field, is my choice.
My personal thinking is that we do tend to greatly overcomplicate practical sharpening. I of course LOVE mirror polished edges that you can use to split and ear hair lengthwise with...I just don't think it is required at all for most field dressing/butchering applications.
I did also spend a period of time in my youth (hated every moment of it) working in an abattoir and saw just how the people who used their knives day in and out to make a living sharpened them...and it was as simple and uncomplicated as it was a "job" not a thing they enjoyed. And yes, on a simple two sided no name stone and a quality steel they had screaming sharp edges (none could tell you what angle) that cut meat all day. Or boned or skinned or cut throats, just depending on where they worked on the line.
But I will now go sit on the lounge and strop my BATAC for an hour....just because I can...