Depends on application... crap or inexpensive components can shoot well...not for serious competition, but field shooting, hunting, or plinking fun.
I agree. For many users and applications, ES and SD values are unimportant and all they care about is whether they can hit reasonably close to the aiming mark at short distances.
Years ago, I got interested in this when shooting pistol cartridge leverguns in a series of quarry ranges, and a police armed team was practicing next door with SIG 223 semi-auto military type rifles. My companion on the 50 metre range disappeared after the racket in the adjacent 100 yard facility ended and reappeared with a large bag full of fired 223 cases. He knew the officer in charge and this was a regular occurrence it seemed.
I had a look at them and was appalled. I wouldn't have put these through any rifle I owned. They were battered and some had really deep ejector peg impressions on the case-heads and rims, I wondered if the hammering they'd taken would have knocked case-heads out of true with the bore axis. Anyway, the guy says to me that his brother is a gamekeeper on a large sporting estate in the north of Scotland and he's always short of 223 brass for carrying out his endless task of fox and other predator control, ejected cases usually lost in the heather or grass. "He rejects the worst cases, but the rest shoot just fine - 150 yards is a long shot up there." he says.
Years on and the Marketing Director of a major UK distributor presents me with a couple of bubble packs of American 'Top Brass' cleaned, sized and primer pocket decrimped military brass for review, one each of 50-ct '223 Rem' and '308 Win' cases (5.56 and 7.62mm of course). They sat on my shelf for years until I started on a major exercise using a 223 F-Class rifle for testing H. VarGet and H4895 alternatives, these powders no longer available to us thanks to health & safety regulations. These used Lapua cases, all starting out new and most batched.
I decided to use the 'Top Brass' cases with a load from the powder tests in a standalone minor secondary test using the bullet, primer, and a powder and charge weight from the main (Lapua case) series. The 223 Top Brass examples were overwhelmingly LCs with a variety of headstamp years, but included 5 x TAA (Taiwan - a new one to me); 1 x WCC; 1 x IVI (Canadian). I should say that although I know LC 5.56 brass is widely used in the US even by some match shooters, it is a rarity in the UK and we have no experience of using it. There was a near 10gn weight difference between typical LC and the heaviest of the 'minority' group and 0.8gn water capacity variation once fireformed.
The brass was used out of the pack apart from a slight shoulder-bump to suit my very short 223 chamber and a case-mouth rechamfer with a carbide 'VLD' profile tool. 30 odd were loaded up with my test load - Russian PMC SRM primers and batched 77gn SMKs loaded to a non-SAAMI COAL to suit my long-throat chamber as used in the powder tests, the powder charge 24.6gn Lovex S0-62 (Shooters World 'Precision' in the US), largely because that powder had been the subject of my most recent previous VarGet-alternative test and also because I had just enough left in the tin to do a couple of small exercises only.
Of the 30 fired as groups, half were all-LC; the other half as big a mix as the supply allowed. I forgot the chronograph on the day, but no matter as it was 100-yard groups I was interested in. Using Lapua brass, the same combination had averaged a shade over 0.3-inches over the final four S0-62 groups with the highest charges including that used in the 'Top Brass' brass test (24.0-24.9gn). These were 4-round groups and the 'Top Brass' groups were now three each of five shots, plus some same-load 'foulers' having been fired beforehand to condition the bore.
Shot in a full F / BR set-up off the bench using a heavy front-rest and three-inch width forend, the three by LC groups were remarkably consistent at 0.401-0.403" C-to-C. The mixed brass trio more variable with 0.325-0.425". On the three-group averages, the mixed brass group 'won' out at 0.371" v the all-LCs' 0.403".
Yes, I know - redo the tests and results would most likely be reversed and it would take a 10 (or more) -series run to meet Bryan Litz's findings on group size variabilities as shown in Modern Advancements in Long Range Shooting Vol 3. Nevertheless, I felt this collection would have worked just fine mixed up as they came for the aforementioned Scottish gamekeeper's 50-150 yard predator shots.
Naturally, I wouldn't use this brass, segregated or not, in an F-Class match, but it's back to distance, application, and for many shooters cost - horses for courses as the old folk-saying has it.

