First 2 pictures are from left to right, 500 nitro blaser,577 Searcy, 700 nitro Searcy, 8 bore underhammer blackpowder, 22 1/2" bl. right hand Ken Owen 4 bore, 24" bl. left hand Ken Owen 4 bore, King Kong 2 bore blackpowder by Steve Zihn

3rd picture is top to bottom 577, 4 bore, 4 bore, 700 nitro, 500 nitro

4th picture is the 2 bore and the 8 bore, both black powder

5th picture is left to right, 585 Wells magnum, 600 overkill, 600 overkill, 700 AHR, 700 AHR. the last 4 are all made by AHR's Wayne Taylor

last picture left to right 14.5mm by SSK, 500 A Square, 500 nitro ruger #1, 510 Kodiak express by Mic McPherson, 500 Jeffery ultralite by Bijou Creek

That is the entire 500 and above family. Enjoy!
Safarikid, thanks for posting the pics.