My socom762rc that just cleared last weekend is going to be used on my 20" .308 bolt action, 14.5" 5.56 AR, and 9" .300blk AR.
Didn't sound too bad on the 5.56 to me. Maybe next time I take it out I'll be able to get my buddy to come along who has a legacy can on his 10.3" 5.56 AR so we can compare.