Sounds like older guns you might not want to use heavier-than-lead in. TSS will score a barrel if it gets loose from the wad.

Originally Posted by prairie dog shooter
I shoot Federal premium loads with 1 1/8 ounce of copper plated #7&1/2 shot in an 870 full choke.
Got a link for that load?

Living in a world of G17s and 700s, wishing for P7s and 202s