Re: need a smith to build a rifle
Do you reload, can you perform minor modifications to brass such as neck turning or do you plan on using factory brass or loads?
Asking for a gunsmith recommendation will net you dozens of opinions about who, where and why. The best are all booked for 6 months at least, some upwards of 9 months to a year depending. Every shooting/hunting website has their favorites so visiting several sites will get you a broader selection of builders. Don't forget to check barrel makers either since some like Hart will build a very nice, accurate rifle using their barrels of course. Or maybe action makers such Kelbly's.
My suggestion for a cartridge is based on 3 years experience shooting the 6.5mm RSAUM for long range hunting, varmints and competition. There is some brass prep necessary for necking 7mm RSAUM brass down and turning the necks a little but once that's done, it's just a matter of standard reloading practices.
Using slower, cooler burning powders will yield high velocities as well as longer barrel and brass life. The case capacity allows you to use the heavier, longer, higher BC bullets for those shots where you need to stretch it out. I'm using DBM for most shooting, however you can select another aftermarket box for the hinged bottom metal to allow you to seat the bullets out a bit more.
Enjoy the research!