I don't mean to kick any ones dog, but I did get to witness what a 7mm mag will do to a poor old Oklahoma whitetail of about 100 pounds give or take, from a measured 250yds this season, and well I'll just say that if you like venison, you may feel short changed. Dressing him out wasn't the most fun I ever had either.
From what I can see, none of the "magnums" of 30 cal and under, (or short magnums, or super short magnums, or sooper dooper ultra short magnums, ad nauseum,) will do anything that a hand-loader can't acomplish with a 30/06 with the exception of launching it from a shorter action rifle.
my2¢
DG
Oh, BTW, that old buck was hit broadside through both shoulders liquefying his heart and lungs, and he ran almost 50yds before going down.
That being said, If you are comfortable with the 7mm mag and have confidence in it , by all means! Use it and more power to you! I think the Handi will more than satify your needs.But I wouldn't sell that Ruger untill I was sure I had a handi that will shoot as well as I needed it to. then you can sell the ruger and buy a half dozen Handi's .