How much of a difference is there between a kreiger ss#7 contour and a ss#8 contour barrel? I want to have Kreiger rebarrel an action I have in the safe. I want go with a 24" length with a 1-10twist chambered in .308. I do not know anything about Kreiger barrel contours except what I read from there site. Thought some of you guys with more shooting time than I could educate me on which would do better and why. Are these contours heavy enough to shoot,say a 10 shot string of fire and stay tight? Sorry up front if this is not that big of a deal either way in choices. There isn't a difference in price but would like to get the most for the money in weight without damaging accuracy. I like to target shoot the most from 100 to around 600yds or so. Hard to get much more distance here in south Ga. Thanks for any help.