Greetings,
I recently machined a mould to produce slugs for swaging. The reason for this is that you can experiment with different alloys.
My testing has shown that there is little difference in group size between Pure Lead, salvaged 22lr metal, and 20:1 alloy.
The slugs cast out at 101.5 grains. I then swage them down to 100 grains, if possible. The targets posted used as cast slugs weighed and swaged in a Core Seat die (no bleed hole). I have since made several die bodies of different diameters with bleed holes.
Here are some typical groups fired at 50 yards in a barrel tester.
"COZENS" is the name of the guy I bought the 22lr salvage from.
I use a Corbin Silver Press with home made dies.
The barrel is a Pardini HP with a 0.3135" groove diameter.
I lube the bullets lightly with Lee Liquid Alox. After firing 100 rounds, the barrel is remarkably clean with only the usual Lead/Carbon fouling in the leade.
Cheers,
Dave