The Drop Zone will have enough left adjustment on the Allegiance,I know a couple guy's who are shooting them on an Allegiance,and Old Glory with No problem.
I have one on my Allegiance as well and I have plenty room to spare. I also use Blazers and have no clearance issues. As far as whether or not to go with the hunter or not, that's up to you. My view is if you buy the rest and like it you might as well spend the money and make sure you get what you want.