For my dillon I either use BL(C)-2 or CFE-223. TAC is another one I like but it's hard to find here. H-335 is another one that was good in both my 223 and 204 Ruger but it also became scarce.
With CFE-223 you need to use 55gr and heavier bullets. It's usually not a problem for blasting ammo since surplus 55gr and 62gr fmj bullets are cheap.
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