I've had a lot of luck with Pelican cases. I buy all of mine from these guys because I can get them with Kaizen foam. Makes customizing it a breeze. Just takes a little patience.
https://www.thecasestore.com/shop
I have multiple cases now, but at first I just ordered some extra Kaizen foam off of Amazon and cut it based on my needs. That way I had different pieces of foam depending on what guns I was taking with me. Ex: I have a five stand setup so if it's off season I'll shoot a bunch of clays. But at night I want my AR-15 so I can chase after pigs. So, I need my sporting over/under and an AR. Might look like this:
View attachment 7238417
That's the Pelican Vault v700 case. I like it because it's pretty compact (compared to some), but can still hold a good amount. For reference, the barrels on that shotgun are 30". You may need one of the larger cases depending on what you're transporting.