I have been using my 20 ga. for grouse hunting. I normally use the Winchester Super X which are cheap but effective. Last year I bought an $11 box of Remington " high brass" . I started using them and ended up missing quite a few shots. Well, I went back to the cheap ones and used those for the rest of the season. This year I started using the high brass ones just to use them up. I noticed that they seem to hold a tighter pattern and reach farther, but it was harder to hit anything with them up close. I was using #6 shot for both types.

Can someone explain the term " high brass" and what exactly it means as far as shooting performance?