Are they aluminum, or steel? See if a magnet will stick to them. I have had the problem with Winchesters before, too. The promo loads at Wal-Mart have steel heads, as do the Federals, but the Federals usually extract fine, and I reload those same steel-head Fed. hulls for my low-pressure (damascus gun) target and hunting loads with few problems. Every now and then one will stick, but I know ahead of time that it will because the gun will be hard to close as well. I'm 99% certain that this is caused by a rim that is slightly oversized, and is sticking in the chamber rim recess on both closing, and opening after firing. But even then, they don't stick badly so I go ahead and shoot them, then toss that hull in the garbage when I extract it.
Jim
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