577/450 cartridge identification

[RCS]

My photo shows three cartridges, two 577/450 and the small 297/250 Rook in the center.

The 577/450 on the left, could it be a carbine loading ?Attachment 81123

Information

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[green]

Yes cordite carbine load ID by the green pp. Does it have KYNOCH 577/450 head stamp?

[RCS]

Yes, my cartridge headstamp is KYNOCH 577/450

Thank you for the information, RCS

[CINDERS]

The rolled round if it has the inspection window is also a Kynoch as there was no H/S
see att pic

[browningautorifle]

the inspection window

I'm guessing this is to examine the state of the paper inside?

[RCS]

CINDERS, I do not have the early inspection window in my early 577/450 cartridge. I have never seen one either.

While on the 577/450 cartridge, anyone remember a chamber insert that allowed you to shoot 45 Colt ?

[CINDERS]

I will try and find out from one of my collector friends its the only 577/450 one I have with the hole the other one does not have it and the next is a drawn case.

[green]

The coiled MH case was made with two reinforcing strips in the base. The hole (window) was so an inspector could see that the second strip was present. Eley contract ctgs were made with a single strip doubled over and lacked the window. This ammo was designated MkIIIE.

[CINDERS]

Thanks G I was going to have a look through my books but you saved me that chore cheers