Only if you are both careless, and moving too darn fast, Mark. I keep my eye on the muzzle of my gun's barrel, as a matter of safety. I don't want it pointed at anything I don't want to destroy, including ME! I don't seem to have any trouble keeping the extended jag from catching on anything.
As to Dan's comment about loading with one, I remove the ramrod when I reach a tree I am going to use as my ground stand, and stand the rod against the bark of the tree, jag end down. To reload my gun, if needed, All I do is back around out of sight of the game, lift the RR straight up, fit the jag into a cleaning patch on the muzzle, and hand over hand it down the barrel, stopping an inch before I hit the plug. OUt it comes, and gets flipped over. I run it down and this time take it to the plug. I check the gooeyness of the patch when it comes out. If its too wet, I use a second, dry patch to dry the barrel further. Then the powder goes in, then the PRB is seated and run down with the RR. the rod gets leaned again against the tree bark, and I prime the pan, then slowly move the barrel around the tree to find the deer again. Only my eye, forehead, and elbow appear around the tree where the deer could see them, with the muzzle of the gun.
The first deer I killed, I followed this exact routine, and I had a fine bead on the neck of a yearling that had been trailing the Doe I shot, when I came around the tree for the second shot. The Doe was not in sight, having staggered down the side of the ravine leaving two yearlings behind. I decided I had made a very good shot on the doe, and passed on shooting the last yearling. I followed the tracks and blood trails down to the bottom of the ravine, where the Doe was piled up, very dead.
So, I don't find leaving the jag on the ramrod an inconvenience in the least. How you handle your gear depends on your personal training and objectives. For instance, when I carry a semi-auto pistol in a case for self defense, I first grab a loaded magazine from the case, and then the pistol. The pistol stabilizes the soft case better than do the shorter magazines, and if I pick up the pistol first, I find half the time that the magazines are spilling out onto the ground below. Without a magazine of ammo in the gun, the gun is an expensive rock. So, I trained myself to grab a loaded magazine FIRST. The same with grabbing a cleaning patch before I take a ramrod out of the pipes after making a quick shot. :hmm: