It very much varies on your area

I know nothing about American "hunter" showing but in Britain the only class you hog (roach) a horse for is a cob class (NOT Welsh Cobs - I mean show cob, working cob etc)

It would be unheard of to hog a hunter shown in the weight divisions (lightweight, middleweight, heavyweight etc.), but as I said before, I have no idea what goes on in America

I'm sure it would be fine for lower level schooling shows, but you would probably be marked down for it in any kind of serious showing