Billy Goat
WKR
Just taking a guess looking at trail cam pictures from different distances and angles. Looking at the last picture of number 4 cant see that bull not being a ways over 300. Thinking its all the same bull and different parts of the horns look bigger and smaller in some of the pics. Thats what made me think 325ish . I can usually guess within 10 inches or so in person. not the best guessing with trail cam pics, or looking through spotter 2 miles away. With trail cam pics or long range glassing I can ussually just tell if its something I would be happy with.
Pictures can be difficult. Hands on I can normally be really close, can be hard to judge without solid references.
I'd be happy with any of them.
Like wrench said a 280 is a nice mature animal in a lot of places.