For those who asked/wondered: John's old Serengeti weighs 8lbs, 0.5 oz, including M8 4x in Talley LWs, on my postal scale. The barrel length is 21 inches, as he's mentioned before. I didn't measure the twist but he's mentioned as well that it is 1:9. I put an inverted Hornady Interlock FB in a Hornady modified case and measured the OAL: 2.290 inches. Below is a picture. If standard case length is 2.235 and the SAAMI chamber length is 2.255, then the throat is either .055 or .035 inches, depending on which measurement one uses. That's considerably than the .250 inch throat in my Featherweight or the almost .5 inch throat in my M98.

Serengeti weight:
[Linked Image from i.imgur.com]

OAL w/Interlock FB:
[Linked Image from i.imgur.com]

Inverted Interlock w/case:
[Linked Image from i.imgur.com]

"An archer sees how far he can be from a target and still hit it, a bowhunter sees how close he can get before he shoots." It is certainly easy to use that same line of thinking with firearms. -- Unknown