i used the 'tupperware' analogy mainly because people would instantly know the inference. I might have used 'milk jug' instead

That would work. We had Tupperware when I was a kid, some of it lasted 40 years. A few pieces on and off since, all first class.

Sort of like saying you stock is a McMillion!

My take is that the lighter calibers do better in the low cost stocks.

Big case 6.5, 270, 280, 308 etc not so good and change to a higher quality stock.