Thanks all for commenting .
I agree that consistency is important , it develops muscle memory . Thats why CptCurl is "hard wired " to shoot the way he does . I dont think I am "hard-wired" yet , although in my limited hunting situations I have seemed to find the front trigger first . One of the reasons I asked this question is because I dont feel my follow up shot is as fast as it could be , after I fire the first shot I have to think to move my finger for second shot . I think I could learn to shoot rear first "if" it offered any advantage for quicker second shot. So far I read nothing to convince me to try and change what I've been doing , probaly just need more practice to develop that " hard-wired" muscle memory . Maybe a trip to West Texas to hunt Jackalope would help the matter .

As for the talk of the rifles doubling , are you talking about the shooters finger slipping off the front trigger and catching the rear trigger during recoil ? I dont think the recoil from my 9.3 is enough to cause that to happen . But if it is a common problem with heavier doubles , then I suppose that could be a reason to try and learn a different way .