How do you do it?

I've got a badlands ox, and I find that if I sling my rifle over my shoulder like I would with my daypack on, I get the 'clink clink clink' of barrel tapping the frame as I walk. I don't want to strap the rifle to the back of the pack, since I'd like to have it quick to hand. I ended up last week hooking the sling over the top of the frame, on the left side, with the rifle forward, between the frame and my body. That worked, kept the bolt from tapping the frame, but I still didn't love it.
Anyone have any tricks?