Lee moulds are all aluminum are they not?
I'd have thought you might get 1 or 2 bullets like that at the start but once the mould was up to temp the problem should have gone away.
In order to have cast that many "boolits" that wrinkely you must have gone very,very slowly or those are all "first drops" from several seperate castings.
Throw em back in the pot and make some good ones.
Better too hot (frostly looking) than too cold.
I'd have thought you might get 1 or 2 bullets like that at the start but once the mould was up to temp the problem should have gone away.
In order to have cast that many "boolits" that wrinkely you must have gone very,very slowly or those are all "first drops" from several seperate castings.
Throw em back in the pot and make some good ones.
Better too hot (frostly looking) than too cold.