I have never had a pierced Cheddite primer, but the reason I have to buy them is because they are greater in diameter than 209s and have to be used in Cheddite and Fiocchi hulls as 209s fall out. Only reason I use Cheddite and Fiocchi hulls is to feed my 28 ga, I have over 80 boxes of this factory European fodder to use up! I just think my 11-48 28 ga is one of the best-looking US made shotguns ever.
Mike