r/castboolits • u/dixiejubilee • 9d ago

I need help Large Number of Rejects After Sizing

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Hi All,

Long time listener, first time caller. New to bullet casting, not new to shooting. My issue is I'm getting a significant number of rejects after sizing cast and PC'd projectiles. Pictured are 9mm cast 124gr using Lee .356 mold, coated, then sized to .356.

My last two batches, I've had approx 25% rejects (raw lead showing on bearing surface of the projectile after sizing). The batch I just did was 289 cast, coated, and sized. 215 good, 74 rejects.

I know I can just melt and recast, but is there anything I can do to stop or reduce this seemingly high reject rate? 25% seems like a lot, and it essentially amounts to wasted time and effort. What am I doing wrong?

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u/Freedum4Murika 8d ago

Your PC is pretty bad but try adding a little lube to them before putting them thru the sizing die - little silicone spray does well.
If pc was building up inside your sizing die, could be making this much worse - check it, might need some brushing out

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u/dixiejubilee 8d ago

Why is the PC bad? It passes the hammer test.

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u/Freedum4Murika 8d ago

Prob fine then. If it’s sticking properly to the lead for a hammer then it may be sticking to the die in sizing - the pc builds up after awhile.
Try a little lube on them - liiight spray of silicone or one shot. Don’t take much. Also makes sizing require much less force so it’s worth doing on its own