Anyone know of a website where I might find this info? thanks in advance.

Note that cartridge dimensions are not the same as chamber dimensions.

I have a huge book of chamber reamer dimensions, give me a FAX number and a drawing will be yours.

"Handloading" by Davis and the NRA 1981 has the SAMMI drawings of 44 mag cartridge and chamber, but I only see them at gunshows, as they are always sold out on line.