If it is an older shotgun maybe the Hevishot Classic Doubles is the
ammo you need
Wingseeker, it's possible. However, after reading the article by Randy Wakeman that compares Hevishot Classic Doubles to Kent Tungsten Matrix, I'm skeptical it's the best no-tox option. I haven't patterned Hevishot Classic Doubles out of my BUL 20 gauge, but I have patterned Kent Tungsten Matrix. The Kent load looks like it's going to work well for me.