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Lilja 1.00" X 21" CZ 457 22LR barrel Question

I've been reading up on failure to extract live rounds and in some cases, also failure to extract fired cases. Anyone have this specific barrel? Also have you had the mentioned problems? In this article, it states no guarantee to extract live rounds. I'm assuming, I'll be stuck with it now anyway. That's why I asked if anyone else had this exact same barrel. Thanks! (y) https://riflebarrels.com/shop/drop-in-barrels/cz-455/22-rf/cz-455-457-22lr-1-000-x-21/

Why do people load so hot?

PM me that recipe. Or post it here if you like. Not that I would run with right off the bat, but I'm curious. I leaned on my 20" 308 pretty good with hybrid cases and 178's. Sadly, it shot the best around the low 2700's with varget so I left it there.
I am using Alpha brass. I tried Fed, Win and even Starline SRPs. None could take it.