Do you understand what we are talking about when we talk about wood grain? Those are the dark lines in the ramrod between the light lines, and represent winter growth rings in a tree while the wider lighter lines represent summer growth in threes.
When we talk about run out, we are literally talking about following a line of wood grain to see if it comes out the side OR " Runs out " the side of the stick! That is " run out".
Run out is no good in ramrods. It represents a shear line in the wood and weakens the stick.
If you can visit a well stocked dealer's shop, where they have huge boxes of hickory stock to make ramrods, you can pick out one that is 1> Straight for as long as you need your rod to be, and 2. one that has straight grain that does not run out. The cost is minimal, but we all learn to take the time to find good wood before buying. Then take it home, cut it to length, put the ferrules you need on each end, glueing and pinning them, and taper the end of the rod that goes into the stock, if needed to pass the front lock plate screw. Some shooters cut a series of grooves in the non-working end of the stick, to help them grab hold of the stick easier. Just don't make them so deep they compromise the wood. They don't have to be too deep to give you purchase with your hands and fingers.
I leave my cleaning jag on the working ferrule end of my rod, so that the end of the jag sticks out beyond the muzzle of my rifle. Its get blackened with powder residue, as soon as the first shot is fired, and the oily residue will get on your bare hands, but in the woods , when hunting, that is a minor problem and I want my jag on that rod so that I can clean the barrel of all the residue, and dry it before reloading the gun for my next shot.