[mehavey]

... the state (Iowa) that specified at least 0.357 minimum diameter (instead of 35 cal), was not paying attention
to the fine print when they wrote their rules. They wanted to allow the 357 magnum, but did not realize that
an ammo maker can ship "in spec" 3[57] magnum ammo as small as 0.355.

I think Winchester used this argument to get them to accept the 350L.

Ahem..... this number look familiar ?

(Aaaahh, eeeerrrr.... That's my 1894 Marlin 357 groove diameter slugged just now.)