I thought maybe there would be some talk about these new slugs Griffin is offering by now so I will go ahead. I am not affiliated with them but they are offering a slug with core insert called an ldc (low density core). It is supposed to aid in expansion and some fragmentation. They did some gel testing and it looks promising to me. Any way they now have a website for ordering and a Youtube video talking about these slugs. They are a little pricey but if you are like me and only shooting a few pigeons per outing it might be worth it for maybe some more knock down power. Bill
https://www.youtube.com/watch?v=4UNdRzsViU4&t=4s&ab_channel=Leadslinger
https://www.youtube.com/watch?v=4UNdRzsViU4&t=4s&ab_channel=Leadslinger