Cooner: Those oversized vent picks are made that way so you can file them to the size you need for your vent hole. Since vent hole sizes also vary, there is not way you can make a pick that fits them all, unless you use a wire so small that it can hardly move any powder aside.
I make picks out of coat hangers. The metal is very soft, easy heated with a propane torch, and then hammered to a square profile so I can stick one end in the jaws of my bench vise, and twist the heated rod to make the twists. I usually make a round or heart shaped handle on the other end, heat welding the tip of the rod to the shaft where it touches.
When the piece cools, I file the point down with a real file, and then file it further to fit the particular gun I am making the pick to serve. I have seen similar picks for sale at Friendship on Commercial Row, and the makers leave the points " fat " so that the owner can file them to fit his particular vent. I leave a flat on at least one side of the point, to act like a shovel, so I can move powder around in the barrel by simply twisting the pick. If I didn't have so many coat hangers around, I probably would use a pipe cleaner to do much the same thing.
Most vent liners are stainless steel, and they won't spark worth a darn because of the high amount of chromium in the metal. The soft steel also won't spark, rarely giving off any sparks at all even when I use a grinder to shape them.