I purchased a lot of Imperial brass in 38-55 (once fired) at a show over the weekend. Looks like decent brass, although a little high in copper content from the color. I plan to load it "when" I get a Uberti 1894 in.

How does this Imperial brass compare to Winchester or Starline? It looks to have a thin neck, I'm guessing similar to Starline?

I'd gamble it's older brass, and if so maybe closer to the specs of the Uberti chamber?

Any thoughts or imput on it?