Lawdog,
Interesting. I just looked through Roger Rule's book on the pre-64 Model 70 and the only cataloged featherweights he lists are in the following calibers: .243, .264, .308, .358, .270, .30/06. However, there could have been custom shop featherweights produced in any caliber.
Do you have the symbol numbers of the calibers you listed in your last post? For example, the symbol number for a .243 featherweight was G7062. The calibers you list should have similar symbol numbers, i.e. the letter G followed by four numbers. I'd like to pass this info along to Mr. Rule.