4 Bore 8 Bore 10 Bore .600NE .600NE .577 Rewa 20/.577 AH & Modern .585 Nyati Ammunition

Nice collection of heavy hitters. But what is 20/577 AH? A 20ga brass hull necked down to 577?

Thank you, yes the 20/577 AH was a Alex Henry Cartridge, which is a brass 20 Bore case necked to .577, I have only seen a couple of these by Alex Henry & I think the cartridges are rare as I have only found one ?

Now I suppose heaps of guys will have one lol !