Okay, a standard hunting barrel is ‘light’ for walking around the woods, but it warms up and whips around more affecting accuracy. Not an issue for a few hunting shots. A heavy barrel doesn’t whip as much, holds accuracy better, but is best for lots repetitive shooting from a stationary position. Don’t even heavy barrels warm up and expand affecting the bullet/rifling contact? About fluting? Some sites say it is the increased surface area that promotes cooling. Some say it is the reduced barrel mass of the fluted areas between the inside and the outside that allow the barrel to cool faster. I looked at the Hart, Shillen, Krieger, McGowan, Lilja and Pac-Nor sites, but they don’t have a clear explanation of the pros & cons of all the various contours. Just that they can provide them. Can someone post a link to a comprehensive primer on the pros & cons of various barrel contours? All I find are sites with contradictory ‘facts’, ‘factoids’ and opinions, and I can’t tell which is which.