What is the Bell 416 Rigby basic brass? Is it cylindrical Rigby brass or is it something else?

Is this the stuff that Mbogo makes his 470Mbogo brass from?

Yep, it's 416 Rigby with no taper, neck, or shoulder. I don't know what the headstamp is though.

Hi Thomas,
I was away for the last week and missed your post. The 416 Rigby cylindrical brass is just the 416 Rigby head and a straight brass without a headstamp and it is the one that I based the 470 Mbogo on.
Take care,
470 Mbogo

Thanks

So I guess it would allso be ok to make 450 Rigby cases from them. Or is using the Norma 416 Rigby brass better?

Just bought 100 416Rigby Norma cases but im curious to what is the best way to go.