Greetings Fam,
I was scrounging on YouTube and ran across a couple of vids on cases etc...
Anyway, I found this one from years ago, and I decided to try this out, because I have many .50 cal ammo cans around.
This works perfect for me. I don't have to buy extra cases, just buy the foam insert and I'm ready to hit the range. I have the one that holds one pistol and several magazines, but I'm going to purchase one that holds two pistols and four magazines next- like what's in the vid. I used two-sided tape for the foam on the lid.
They have them on Amazon: "Case Club Ammo Can Foam Inserts"