I keep some, like when I experimented with .400"x.400" pure lead balls in my .40 that had a .398" bore.
I also tried the other cavity that cast .400" x .394" balls.
I shot both bench, then offhand groups to display what an accurate load does to offhand shooting, compared to
a poor shooting load, bench and offhand. Folks had said accuracy doesn't matter because I'm shooting offhand.
My test shows otherwise. That was important to keep. Some are, most aren't.
Targets I do keep, are kept in a 3-ring binder with other test data for that particular rifle.
Here's a couple I kept - the first 5-shot group offhand from a VERY deeply grooved rifle. .028" rifling depth, all 8 of them.
This target only shows 3 actual ball impacts, actually a little smaller than a true cloverleaf.
It was only 25 yards and I was only about 26 years old & could see and hold a rifle fairly true.
Wasn't coned, but had a 1/4" deep cone shaped smooth concave muzzle crown to assist in loading
the .457" balls I was using in this .448" bore. With this rifle and loading .457|" balls and .022" denim patches
I once lost my short starter between the starting line and the first target. I had to load those balls without
as short starter by choking up on the 3/8" rod and shoving the patched ball into the muzzle. I once pulled
one out loading with a long strip of cloth and the ball was rounded on both ends, literally a slug.
The second, a picture of my wall of pride. My split cards which also have the gun used to shoot them.
Some are only 1/2 as both pieces could not be found in the snow, usually. There two I stapeled on to show
what happens if you are not in proper line with the cards - or the cards are wet. They didn't count as the card
was not cut all the way, into 2 pieces middle Ace od Hearts and 8 of diamonds. Note a lot of the cards were
cut with the Goodoien barrel on a flintlock rifle and some were cut with a .32 Flinter, squirrel rifle.
