there are some interesting videos by G.K. himself, showing what i consider good results with vers.3 mp mold slugs and in a later video also with the huben 'peanuts'. of course casting, even with sizing, is not as precise as (industrial) swaging. but at least in my k1 the cast slugs don't move a bit on their own in the mag, which an issue with many industrially manufactured ones:
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