Excellent rifles - very accurate - and they understand hunting:
http://www.rbrosrifles.com/Also, Rick at
http://www.freudscustomrifles.com/Both R-Brothers and Rick Freuedenberg build very, very good rifles. Rick has done some work for me, and I've shot some R-Bros rifles.
The 7mm is a great cartridge. Recoil isn't bad at all (seems about like a .30-06 to me). Accuracy can be very good. Biggest game I ever took with mine was a good sized 6x6 bull elk. Used a handloaded 175 gr Nosler Partition, one shot drop. Complete penetration. Couldn't have asked for anything better.
I like a Krieger barrel, but there are many excellent choices avail these days.
Switch out the bolt? Not likely - depending on what your rifle is and what you want it to be... If it's already a magnum, and you're building a magnum - no. If it's not a magnum, say it's a .30-06, then the bolt face will need to be opened up. That's an easy operation for a competent gunsmith.
Regards, Guy