sounds like a good plan with the 2x7. I highly recommend IT&D for barrel work, quick and good value. the last one the installed for me was under $400, stainless to boot. douglas barrel. I have a half dozen or more douglas barrels and they all shoot well.
I will be selling a FW mod 70 at a gunshow this upcoming weekend chambered in 7x57.Not mine, belongs to the gun shop I am working for.Cant remember the price right now, but if anyone interested, call me.