With the load I'm using, I don't think I really need a metal gas check. I tried shooting without a check on and got lots of leading. No leading with a check.
I was thinking of a flat gas check punched out of milk carton cardboard. I would stick it on with hot glue, dip lube like I do with metal checks, and size when I need to in the Lee sizer.
With the price of checks going the way it's going, if it would work, it seems like a cheap alternative.
Has anyone tried something like this?????