I have a handi rifle made for modern rounds, and I have a 20 gauge barrel I could cut off and stub it. Thinking about making a rifle in either 40/65 or 30/30. I would imagine either one would work fine. Both of these rounds impressed me on a shooting outing, and I can see a set up on a handy being cheaper to make, than building on any other single shot action. I currently have a .357 magnum and maximum barrel for this rifle. Might be better off just putting some sight on the .357 max and see how it will do long range. The 30/30 did so well out to nearly 500 yds that I am thinking of getting one to 1000 yds, the 40/65 as well. What are your thoughts? John Taylor chime in here anytime.