I have a 7mm RM and ordered a new Shilen 5.5 contour barrel which will be 28" finished. Should I take the opportunity to re-chamber to a 7mm RUM?? Why would you? and why wouldn't you? I've heard they are finicky barrel burners and all the rest. Just want to hear some opinions. I like the idea of an unbelted mag shooting the 180 gr over 3000 fps as long as it's accurate. I'm lucky to have a great gunsmith that really knows how to make em shoot. I will be using it for WY deer and UT Elk which usually means long range hunting and long range targets (1000 plus on targets). I don't mind re-barreling every few years. Thanks in advance for your help. I'm torn!