You're right, jfischer. After awhile the weights feel and sound different. I recently bought a box of Pb ingots and clip-on ingots and I could tell by the way they rattled which was which.
I haven't found too many zinc weights, I think they're getting too expensive to be practical. They're very close to the density of regular clip-ons so I keep my good eye peeled looking for them.
Life Member NRA, TSRA
Smokeless powder is a passing fad! -Steve Garbe
I hate rude behavior in a man. I won't tolerate it. -Woodrow F. Call Lonesome Dove
My favorite recipes start out with a handful of used wheelweights.