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I meant to emphasize that this was about .223/5.56 cases.

I guess what I'm saying is that the "nny" stuff stretches less and it's pretty cheap, the Lake City stretches most - it's cheap, too. The more expensive stuff stretches a moderate amount.

If I want to do less case prep, I think I would prefer the "nny" (or 'Monarch' brand from Academy, which I think is Russian or some other Eastern Bloc). But does anyone think it performs any different?

It may be overkill, but I've been trimming and deburring all my brass. It's all mixed and different brands from picking up at the range.
Anyway, I observed that of all the different brands, the Lake City (LC) takes the most trimming. The one that takes the least, as far as this experience goes, is what I think is Russian .223. It has a headstamp that looks like "nny". All the other brass, Remington, Winchester or whatever, was somewhere in between, Just curious - is there a reason for that? Are the pressures different, the brass different or just coincidence?