I've been a 7mm Mag shooter since I've been 14. I'm 52 now. I have no idea how many heads of game have fallen to my rifle but I have taken 68 species total and at least 60 of those species fell to the 7mm. I've also used a 300 Win Mag a little, have shot some game with a 300 WSM, a 7x57 Mauser and a 270 Win. I have no experience with the .28 Nosler. I'm pretty confident there isn't enough difference in the 3 calibers the OP listed to make any arguments worthwhile. A bullet from any of the 3, placed properly will kill any deer or elk out to the stated range.