Is there a SAAMI 50 BMG spec?

Sporting Arms & Ammunition Manufacturers Institute (SAAMI)

The BMG isn't really a Sporting Arms cartridge, it's a military MG round.

Arguably, I find it a very sporting cartridge, just a bit expensive to shoot.
 
Hi,

I am pretty sure it has NEVER been a SAAMI listed cartridge, everyone has always used CIP for it when discussing "standard".

Sincerely,
Theis
That would make sense as to why there is no SAAMI drawing, the problem Im seeing is that the CIP and the Browning drawing are different, significantly enough to cause a chambering issue.
 
No matter what chamber spects you use there is going to be a problem. considering the cartridge wont handle pressure and was never designed to. its a 125 year old cartridge and is obsolete. but still impressive by volume, size and weight.