I use GC’s in heavier loads.
There’s many different factors in getting good shooting cast loads. Some say it’s an art not a science, IDK. GC bullets almost always work for me as well as plain base. But I use plain base in many cartridges, mainly because the extra cost of the gas check isn’t worth it in mild loads.

I prefer classic.
Semper Fi
I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally