Lol I have come up with a system for locating my lead glans i use a stationary chain saw file to put a groove in the mddle of my 6 ounce lead egg sinkers then I tie 12 inches of 1/4 inch yellow ribbon to sinker and wrapp it around the groove. I knot on end stick the un-knotted end though the hole in the sinker pull tight up to the knot tie another knot right at the end of the sinker. then wrap the remaining ten inhces around the glan. in flight te ribbn comes undone and become like a sling bullet tracer. Works
great for me. It also solved a mystery. I often find just the ribbon sticking out of the ground. with a tug out pops my bullet. A.K.A the mystery of the dispearing sling bullet. a lot of them were sinking into the soil

lol thats really cool, be funny to see a bunch of ribbons sticking out of the ground

awe I am loved down under (hmm some how that doesnt sound right. Good thing its platonic and all )
and the drag if there is any doesnt seem to affect my distance. It may be my imagination but I beleave I am more accurate with the ribbons
What can I say Tie a yellow ribbon around the old lead glan lol

Is that the mentality behind arrow fletching?

As soon as I read your post, Lobo, I ran out to the local Walmart and purchased two boxes of 2oz. bank sinkers and two boxes of 2oz. slip (egg) sinkers and a small spool of 1/2" wide, bright yellow, seam edging.  (Sorry, no pics).

The bank sinkers were 6 to a box @ $1.76 usd.
The slip (egg) sinkers were 4 to a box--same price.
Seam edging = $1.27 usd.

First blush:  A lot easier to find than golf balls in the rough.