What do you mean "snipers started shooting CM rather than HS?" Always been taught to go for CM in just about every situation! The only time HS is recommended is for armed/hostage situations where the target is to be "switched off" and that is 9 times out of 10 in a 40 yards or less target acquisition. And before you go spouting off what you read in some soldier of fortune magazine,my time in SSBC at Lejeune is why I hate Lejeune! So how's about you stick to what you might or might not know with bench guns and leave the SS training to those of use that have been through it!
Also for the record, there are many on here that shoot a hell of a lot more than "your average hunter". I usually send more rounds downrange in a week than a lot of "hunters" do in their lifetime. As does most of the guys who have posted right here on this thread. A lot of you "bench guys" crack me up because a lot of you seem to think you know all there is to know about shooting and the "other shooters" don't know their butts from a hole in the ground. Most of you wouldn't know what to do if you didn't have a 30 pound bulled barrel and a 20 pound stock! Just why is it you seem to think we don't know about barrel heat causing "stringing" or barrel fouling causing groups to open up? Part of when I test a new rifle out is seeing just when the barrel heats up to a point to cause stringing!
In ending, I'll say what's already been said, just because YOU can't do it in no way means others can't!