I'm in the process of ordering a new Krieger barrel, for a Savage switch barrel. So far, I've decided on a 375-06 imp with a 15" twist, a .366 bore and .376 grooves, a #4 contour (.670 at the muzzle) 25" long. Is there anything special that I should request about the throating, or can I deal with what they send me. Also, if you can see anything wrong with the direction I'm headed in, I'd appreciate your input. This is my first project so I'm doing the best I can with the info I have. This will be a cast boolit dedicated gun. Thanks in advance for any help you can offer. Ron.D