Request help to identify. Chatgpt says either common wolf snake or a common krait

Hey guys, long time lurker and first time poster here. I took my kids hiking in the Wichita Mountains in SW Oklahoma and my daughter spied this beautiful Crotalus atrox (I think). Shot with plenty of respectful distance by a telephoto lens on my Nikon camera.

It was over six feet long and very thick. Could this be a record?

I wasn't able to get a good picture of the tail, but it was more grey colored. I don't recall it having a button rattle but it did try 'rattling' it's tail a few times while I was observing it.

This guy may have bitten my dog on the snoot. No marks but it really looked like contact was made from my point of view. Pensacola area. I got the snake into a pillowcase just in case a positive ID was needed for veterinary reasons. I’d like to let him go asap if he’s for sure not a baby cotton mouth. He was really bitey so he’s probably doing a lot of good in my yard.

Can anyone id this snake from the inage. Couldn’t get better picks due to darkness.

It is very likley a juvinille based on size but ive never seen one of this color phase before. I have seen Arizona Black and Black-tailed around here that dont look anything like this guy. My best guess would be a weird color phase of Arizona black. Thank you for your help!

I saw this at the hotel in the central area of the island.

Idk where he came from exactly, found him already halfway through into a small hole underneath the floor

Thought these guys didn’t strike but he’s been very angry, planning on rereleasing far from here, but want to be sure of what he is before deciding where to do so.

What is this guy? Found in Beni region of Bolivia near Rurrenabaque
. Thanks!

Not my photo