They're not a replacement for good form and definitely not on par with a solid rest or a bipod. Way to much emphasis put on em.
I wouldn't bet on that. A good sling position is rock solid, it allows the rifle to fall back into position or your natural point of aim much better the shooting from the bipod or rest. You certainly don't get the "bipod hop".
I shoot better from the setting position w/sling then prone, but I shoot both much better then from a rest or bipod.
To say they aren't on par tells me somebody doesn't really know how to use a sling properly.
Gonna have a hard time convincing this guy that he puts too muc emphasis on the sling.