I have seen so much worse, those about as good as it gets for a slug, the rest it cosmetic, might be a touch on the hot sideFor your first attempt I have got to say they look SUPERB.
If your was column is too short, try using bulkier powder or a nitro card under your slug. You should be doing that anyway for a more solid base.
Have you tried roll crimping? I've been reloading Lee Key slugs for a while. I roll crimp most of mine. I recently bought a hammerhead slug mold. They fit in SPW sabots made by SlugsRus. Accuracy has been super even with slower burning magnum powders. View attachment 10729
View attachment 10730
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BPI sells nitro cards pretty darn cheap. That would keep u from punching ur own.
You using a smooth or rifled barrel?
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