So I took my newly finished .308 on a pretty good boar hunt this weekend. The last thing I did to this rifle was to take my TAB Gear Sling off my other rifle and throw it on here, since I love shooting with it. Problem is, those slings are made from such slippery webbing that the thing absolutely sucks as a true shoulder sling--it just slides up, down, etc. all over your shoulder. Anyone had any successful mods to it, all la sewing some material on to friction points, etc?