I have been shooting a long time and was taught to use a sling (GI style) by my ex-marine dad. it helps keep the gun steady for off hand shots. I have seen a lot of sporters with "barrel band" sling mounts and was thinking that a tight sling would tweak the barrel ever so slightly as to cause an errant shot. does anyone concour? just curious if there is a way use the sling to assist without putting pressure on the barrel?