I don’t have anything to add to the thread topic of what caliber Chub didn’t care for, but I did end up with his 6.5-280AI a few years back. As Mule deer said it is engraved blowhole express. It’s based on a Winchester model 70 action. I can’t remember off the top of my head what barrel is on it or stock manufacturer. I believe it might have been an MPI stock.
Every once in awhile I pull it out of the safe it lives in and imagine the things that rifle has seen. I listened to stories from my step dad of his adventures with chub and decided to purchase the rifle for sentimental reasons. I personally haven’t hunted with it but do plan on it one day. I have done some google searching on it and have found quite a bit of info on the rifle. Anyone interested can google it up and a few articles will pop up. His nephew came into my gun shop a few times and I told him I was the owner of that rifle. We had some fun conversations about Chub.